link之家
链接快照平台
- 输入网页链接，自动生成快照
- 标签化管理网页链接
相关文章推荐
|
追风的铁链 · 拉普拉斯方程式 Laplace's ...· 1 周前 · |
|
|
机灵的牛肉面 · 传统色刷屏背后是中式审美的共鸣 _中国经济网 ...· 3 周前 · |
|
|
沉稳的墨镜 · 《继园台七号》60年代香港的点点滴滴· 1 月前 · |
|
|
活泼的石榴 · 横跨日韩两国偶像圈的她，竟然是个从15岁就开 ...· 2 月前 · |
|
|
深情的伤疤 · 教育部办公厅关于进一步做好普通高校毕业生就业 ...· 2 月前 · |
static System::UInt32 ToUInt32(float value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (float value);[<System.CLSCompliant(false)>]
static member ToUInt32 : single -> uint32Public Shared Function ToUInt32 (value As Single) As UInteger以下示例尝试将值数组 Single 中的每个元素转换为无符号整数。
float[] values= { Single.MinValue, -1.38e10f, -1023.299f, -12.98f,
0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue };
uint result;
foreach (float value in values)
try {
result = Convert.ToUInt32(value);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
value.GetType().Name, value);
// The example displays the following output:
// The Single value -3.402823E+38 is outside the range of the UInt32 type.
// The Single value -1.38E+10 is outside the range of the UInt32 type.
// The Single value -1023.299 is outside the range of the UInt32 type.
// The Single value -12.98 is outside the range of the UInt32 type.
// Converted the Single value 0 to the UInt32 value 0.
// Converted the Single value 9.113E-16 to the UInt32 value 0.
// Converted the Single value 103.919 to the UInt32 value 104.
// Converted the Single value 17834.19 to the UInt32 value 17834.
// The Single value 3.402823E+38 is outside the range of the UInt32 type.
let numbers =
[| Single.MinValue; -1.38e10f; -1023.299f; -12.98f
0f; 9.113e-16f; 103.919f; 17834.191f; Single.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"{number} is outside the range of the UInt32 type."
// The example displays the following output:
// -3.402823E+38 is outside the range of the UInt32 type.
// -1.38E+10 is outside the range of the UInt32 type.
// -1023.299 is outside the range of the UInt32 type.
// -12.98 is outside the range of the UInt32 type.
// Converted the Single value '0' to the UInt32 value 0.
// Converted the Single value '9.113E-16' to the UInt32 value 0.
// Converted the Single value '103.919' to the UInt32 value 104.
// Converted the Single value '17834.19' to the UInt32 value 17834.
// 3.402823E+38 is outside the range of the UInt32 type.
Dim values() As Single = { Single.MinValue, -1.38e10, -1023.299, -12.98, _
0, 9.113e-16, 103.919, 17834.191, Single.MaxValue }
Dim result As UInteger
For Each value As Single In values
result = Convert.ToUInt32(value)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
value.GetType().Name, value, result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
value.GetType().Name, value)
End Try
' The example displays the following output:
' The Single value -3.402823E+38 is outside the range of the UInt32 type.
' The Single value -1.38E+10 is outside the range of the UInt32 type.
' The Single value -1023.299 is outside the range of the UInt32 type.
' The Single value -12.98 is outside the range of the UInt32 type.
' Converted the Single value 0 to the UInt32 value 0.
' Converted the Single value 9.113E-16 to the UInt32 value 0.
' Converted the Single value 103.919 to the UInt32 value 104.
' Converted the Single value 17834.19 to the UInt32 value 17834.
' The Single value 3.402823E+38 is outside the range of the UInt32 type.
public:
static System::UInt32 ToUInt32(System::String ^ value, IFormatProvider ^ provider);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string? value, IFormatProvider? provider);
[<System.CLSCompliant(false)>]
static member ToUInt32 : string * IFormatProvider -> uint32
Public Shared Function ToUInt32 (value As String, provider As IFormatProvider) As UInteger
以下示例定义一个自定义
NumberFormatInfo
对象，该对象将字符串“pos”识别为正号，将字符串“neg”识别为负号。 然后，它会尝试使用此提供程序和
NumberFormatInfo
固定区域性的提供程序将数值字符串数组的每个元素转换为整数。
using System;
using System.Globalization;
public class Class1
public static void Main()
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo provider = new NumberFormatInfo();
provider.PositiveSign = "pos ";
provider.NegativeSign = "neg ";
// Define an array of numeric strings.
string[] values = { "123456789", "+123456789", "pos 123456789",
"123456789.", "123,456,789", "4294967295",
"4294967296", "-1", "neg 1" };
foreach (string value in values)
Console.Write("{0,-20} -->", value);
try {
Console.WriteLine("{0,20}", Convert.ToUInt32(value, provider));
catch (FormatException) {
Console.WriteLine("{0,20}", "Bad Format");
catch (OverflowException) {
Console.WriteLine("{0,20}", "Numeric Overflow");
// The example displays the following output:
// 123456789 --> 123456789
// +123456789 --> Bad Format
// pos 123456789 --> 123456789
// 123456789. --> Bad Format
// 123,456,789 --> Bad Format
// 4294967295 --> 4294967295
// 4294967296 --> Numeric Overflow
// -1 --> Bad Format
// neg 1 --> Numeric Overflow
open System
open System.Globalization
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
let provider = NumberFormatInfo()
provider.PositiveSign <- "pos "
provider.NegativeSign <- "neg "
// Define an array of numeric strings.
let values =
[| "123456789"; "+123456789"; "pos 123456789"
"123456789."; "123,456,789"; "4294967295"
"4294967296"; "-1"; "neg 1" |]
for value in values do
printf $"{value,-20} -->"
printfn $"{Convert.ToUInt32(value, provider),20}"
| :? FormatException ->
printfn "%20s" "Bad Format"
| :? OverflowException ->
printfn "%20s" "Numeric Overflow"
// The example displays the following output:
// 123456789 --> 123456789
// +123456789 --> Bad Format
// pos 123456789 --> 123456789
// 123456789. --> Bad Format
// 123,456,789 --> Bad Format
// 4294967295 --> 4294967295
// 4294967296 --> Numeric Overflow
// -1 --> Bad Format
// neg 1 --> Numeric Overflow
Imports System.Globalization
Module Example
Public Sub Main()
' Create a NumberFormatInfo object and set several of its
' properties that apply to numbers.
Dim provider As New NumberFormatInfo()
provider.PositiveSign = "pos "
provider.NegativeSign = "neg "
' Define an array of numeric strings.
Dim values() As String = { "123456789", "+123456789", "pos 123456789", _
"123456789.", "123,456,789", "4294967295", _
"4294967296", "-1", "neg 1" }
For Each value As String In values
Console.Write("{0,-20} -->", value)
Console.WriteLine("{0,20}", Convert.ToUInt32(value, provider))
Catch e As FormatException
Console.WriteLine("{0,20}", "Bad Format")
Catch e As OverflowException
Console.WriteLine("{0,20}", "Numeric Overflow")
End Try
End Sub
End Module
' The example displays the following output:
' 123456789 --> 123456789
' +123456789 --> Bad Format
' pos 123456789 --> 123456789
' 123456789. --> Bad Format
' 123,456,789 --> Bad Format
' 4294967295 --> 4294967295
' 4294967296 --> Numeric Overflow
' -1 --> Bad Format
' neg 1 --> Numeric Overflow
返回值是在 上
value
调用
UInt32.Parse
的结果。
provider
是获取
IFormatProvider
NumberFormatInfo
对象的实例。 对象
NumberFormatInfo
提供有关 格式的
value
区域性特定信息。 如果
provider
为
null
，
NumberFormatInfo
则使用当前区域性的 。
如果不想在转换失败时处理异常，可以改为调用
UInt32.TryParse
方法。 它返回一个
Boolean
值，该值指示转换是成功还是失败。
public:
static System::UInt32 ToUInt32(System::String ^ value, int fromBase);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string value, int fromBase);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string? value, int fromBase);
[<System.CLSCompliant(false)>]
static member ToUInt32 : string * int -> uint32
Public Shared Function ToUInt32 (value As String, fromBase As Integer) As UInteger
public static void Main()
string[] hexStrings = { "80000000", "0FFFFFFF", "F0000000", "00A3000", "D",
"-13", "9AC61", "GAD", "FFFFFFFFFF" };
foreach (string hexString in hexStrings)
Console.Write("{0,-12} --> ", hexString);
try {
uint number = Convert.ToUInt32(hexString, 16);
Console.WriteLine("{0,18:N0}", number);
catch (FormatException) {
Console.WriteLine("{0,18}", "Bad Format");
catch (OverflowException)
Console.WriteLine("{0,18}", "Numeric Overflow");
catch (ArgumentException) {
Console.WriteLine("{0,18}", "Invalid in Base 16");
// The example displays the following output:
// 80000000 --> 2,147,483,648
// 0FFFFFFF --> 268,435,455
// F0000000 --> 4,026,531,840
// 00A3000 --> 667,648
// D --> 13
// -13 --> Invalid in Base 16
// 9AC61 --> 633,953
// GAD --> Bad Format
// FFFFFFFFFF --> Numeric Overflow
open System
let hexStrings =
[| "80000000"; "0FFFFFFF"; "F0000000"; "00A3000"
"D"; "-13"; "9AC61"; "GAD"; "FFFFFFFFFF" |]
for hexString in hexStrings do
printf $"{hexString,-12} --> "
let number = Convert.ToUInt32(hexString, 16)
printfn $"{number,18:N0}"
| :? FormatException ->
printfn "%18s" "Bad Format"
| :? OverflowException ->
printfn "%18s" "Numeric Overflow"
| :? ArgumentException ->
printfn "%18s" "Invalid in Base 16"
// The example displays the following output:
// 80000000 --> 2,147,483,648
// 0FFFFFFF --> 268,435,455
// F0000000 --> 4,026,531,840
// 00A3000 --> 667,648
// D --> 13
// -13 --> Invalid in Base 16
// 9AC61 --> 633,953
// GAD --> Bad Format
// FFFFFFFFFF --> Numeric Overflow
Module Example
Public Sub Main()
Dim hexStrings() As String = { "80000000", "0FFFFFFF", "F0000000", "00A3000", "D", _
"-13", "9AC61", "GAD", "FFFFFFFFFF" }
For Each hexString As String In hexStrings
Console.Write("{0,-12} --> ", hexString)
Dim number As UInteger = Convert.ToUInt32(hexString, 16)
Console.WriteLine("{0,18:N0}", number)
Catch e As FormatException
Console.WriteLine("{0,18}", "Bad Format")
Catch e As OverflowException
Console.WriteLine("{0,18}", "Numeric Overflow")
Catch e As ArgumentException
Console.WriteLine("{0,18}", "Invalid in Base 16")
End Try
End Sub
End Module
' ' The example displays the following output:
' 80000000 --> 2,147,483,648
' 0FFFFFFF --> 268,435,455
' F0000000 --> 4,026,531,840
' 00A3000 --> 667,648
' D --> 13
' -13 --> Invalid in Base 16
' 9AC61 --> 633,953
' GAD --> Bad Format
' FFFFFFFFFF --> Numeric Overflow
如果
fromBase
为 16，则可以在参数指定的
value
数字前面添加“0x”或“0X”。
UInt32
由于数据类型仅支持无符号值，因此 该方法
ToUInt32(String, Int32)
假定
value
使用无符号二进制表示形式表示。 换句话说，所有 32 位都用于表示数值，而符号位不存在。 因此，可以编写代码，在代码中，将数据类型范围
UInt32
外有符号整数值转换为
UInt32
值，而不会引发方法异常。 以下示例将 转换为
MinValue
其十六进制字符串表示形式，然后调用
ToUInt32(String, Int32)
方法。 方法显示消息“0x80000000转换为2147483648”，而不是引发异常。
// Create a hexadecimal value out of range of the UInt32 type.
string value = Convert.ToString(Int32.MinValue, 16);
// Convert it back to a number.
UInt32 number = Convert.ToUInt32(value, 16);
Console.WriteLine("0x{0} converts to {1}.", value, number);
catch (OverflowException)
Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.",
value);
// Create a hexadecimal value out of range of the UInt32 type.
let value = Convert.ToString(Int32.MinValue, 16)
// Convert it back to a number.
let number = Convert.ToUInt32(value, 16)
printfn $"0x{value} converts to {number}."
with :? OverflowException ->
printfn $"Unable to convert '0x{value}' to an unsigned integer."
' Create a hexadecimal value out of range of the UInt32 type.
Dim value As String = Convert.ToString(Integer.MinValue, 16)
' Convert it back to a number.
Dim number As UInt32 = Convert.ToUInt32(value, 16)
Console.WriteLine("0x{0} converts to {1}.", value, number)
Catch e As OverflowException
Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.", _
value)
End Try
在执行二进制运算或数值转换时，开发人员始终有责任验证方法或运算符是否使用适当的数值表示形式来解释特定值。 以下示例演示了一种确保方法不会不当使用二进制表示形式来解释在将十六进制字符串
UInt32
转换为值时使用二进制补补表示形式的值的方法。 该示例确定值在将该值转换为字符串表示形式时是表示有符号整数还是无符号整数。 当示例将值转换为值时
UInt32
，它会检查原始值是否为有符号整数。 如果是这样，并且其高阶位设置为 (指示原始值为负) ，则 该方法将引发异常。
// Create a negative hexadecimal value out of range of the UInt32 type.
int sourceNumber = Int32.MinValue;
bool isSigned = Math.Sign((int)sourceNumber.GetType().GetField("MinValue").GetValue(null)) == -1;
string value = Convert.ToString(sourceNumber, 16);
UInt32 targetNumber;
targetNumber = Convert.ToUInt32(value, 16);
if (isSigned && ((targetNumber & 0x80000000) != 0))
throw new OverflowException();
Console.WriteLine("0x{0} converts to {1}.", value, targetNumber);
catch (OverflowException)
Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.",
value);
// Displays the following to the console:
// Unable to convert '0x80000000' to an unsigned integer.
// Create a negative hexadecimal value out of range of the UInt32 type.
let sourceNumber = Int32.MinValue
let isSigned = sign (sourceNumber.GetType().GetField("MinValue").GetValue null :?> int) = -1
let value = Convert.ToString(sourceNumber, 16)
let targetNumber = Convert.ToUInt32(value, 16)
if isSigned && targetNumber &&& 0x80000000u <> 0u then
raise (OverflowException())
printfn $"0x{value} converts to {targetNumber}."
with :? OverflowException ->
printfn $"Unable to convert '0x{value}' to an unsigned integer."
// Displays the following to the console:
// Unable to convert '0x80000000' to an unsigned integer.
' Create a negative hexadecimal value out of range of the UInt32 type.
Dim sourceNumber As Integer = Integer.MinValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As UInt32
targetNumber = Convert.ToUInt32(value, 16)
If isSigned And ((targetNumber And &H80000000) <> 0) Then
Throw New OverflowException()
Console.WriteLine("0x{0} converts to {1}.", value, targetNumber)
End If
Catch e As OverflowException
Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.", _
value)
End Try
' Displays the following to the console:
' Unable to convert '0x80000000' to an unsigned integer.
public:
static System::UInt32 ToUInt32(System::Object ^ value, IFormatProvider ^ provider);
[System.CLSCompliant(false)]
public static uint ToUInt32 (object value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static uint ToUInt32 (object? value, IFormatProvider? provider);
[<System.CLSCompliant(false)>]
static member ToUInt32 : obj * IFormatProvider -> uint32
Public Shared Function ToUInt32 (value As Object, provider As IFormatProvider) As UInteger
以下示例定义了一个
HexString
实现 接口的类，该类
IConvertible
旨在保存 32 位有符号值和 32 位无符号值的字符串表示形式。 类包含一个
Sign
属性，该属性指示其十六进制值的符号。
using System;
using System.Globalization;
using System.Text.RegularExpressions;
public enum SignBit { Negative=-1, Zero=0, Positive=1 };
public struct HexString : IConvertible
private SignBit signBit;
private string hexString;
public SignBit Sign
set { signBit = value; }
get { return signBit; }
public string Value
set {
if (value.Trim().Length > 8)
throw new ArgumentException("The string representation of a 32-bit integer cannot have more than 8 characters.");
else if (! Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase))
throw new ArgumentException("The hexadecimal representation of a 32-bit integer contains invalid characters.");
hexString = value;
get { return hexString; }
// IConvertible implementations.
public TypeCode GetTypeCode()
return TypeCode.Object;
public bool ToBoolean(IFormatProvider provider)
return signBit != SignBit.Zero;
public byte ToByte(IFormatProvider provider)
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt32(hexString, 16)));
try {
return Byte.Parse(hexString, NumberStyles.HexNumber);
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToUInt32(hexString, 16)), e);
public char ToChar(IFormatProvider provider)
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt32(hexString, 16)));
try {
ushort codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber);
return Convert.ToChar(codePoint);
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt32(hexString, 16)), e);
public DateTime ToDateTime(IFormatProvider provider)
throw new InvalidCastException("Hexadecimal to DateTime conversion is not supported.");
public decimal ToDecimal(IFormatProvider provider)
if (signBit == SignBit.Negative)
int hexValue = Int32.Parse(hexString, NumberStyles.HexNumber);
return Convert.ToDecimal(hexValue);
uint hexValue = UInt32.Parse(hexString, NumberStyles.HexNumber);
return Convert.ToDecimal(hexValue);
public double ToDouble(IFormatProvider provider)
if (signBit == SignBit.Negative)
return Convert.ToDouble(Int32.Parse(hexString, NumberStyles.HexNumber));
return Convert.ToDouble(UInt32.Parse(hexString, NumberStyles.HexNumber));
public short ToInt16(IFormatProvider provider)
if (signBit == SignBit.Negative)
try {
return Convert.ToInt16(Int32.Parse(hexString, NumberStyles.HexNumber));
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt32(hexString, 16)), e);
try {
return Convert.ToInt16(UInt32.Parse(hexString, NumberStyles.HexNumber));
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt32(hexString, 16)), e);
public int ToInt32(IFormatProvider provider)
if (signBit == SignBit.Negative)
return Int32.Parse(hexString, NumberStyles.HexNumber);
try {
return Convert.ToInt32(UInt32.Parse(hexString, NumberStyles.HexNumber));
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt32(hexString, 16)), e);
public long ToInt64(IFormatProvider provider)
if (signBit == SignBit.Negative)
return Convert.ToInt64(Int32.Parse(hexString, NumberStyles.HexNumber));
return Int64.Parse(hexString, NumberStyles.HexNumber);
public sbyte ToSByte(IFormatProvider provider)
if (signBit == SignBit.Negative)
try {
return Convert.ToSByte(Int32.Parse(hexString, NumberStyles.HexNumber));
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
Int32.Parse(hexString, NumberStyles.HexNumber), e));
try {
return Convert.ToSByte(UInt32.Parse(hexString, NumberStyles.HexNumber));
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
UInt32.Parse(hexString, NumberStyles.HexNumber)), e);
public float ToSingle(IFormatProvider provider)
if (signBit == SignBit.Negative)
return Convert.ToSingle(Int32.Parse(hexString, NumberStyles.HexNumber));
return Convert.ToSingle(UInt32.Parse(hexString, NumberStyles.HexNumber));
public string ToString(IFormatProvider provider)
return "0x" + this.hexString;
public object ToType(Type conversionType, IFormatProvider provider)
switch (Type.GetTypeCode(conversionType))
case TypeCode.Boolean:
return this.ToBoolean(null);
case TypeCode.Byte:
return this.ToByte(null);
case TypeCode.Char:
return this.ToChar(null);
case TypeCode.DateTime:
return this.ToDateTime(null);
case TypeCode.Decimal:
return this.ToDecimal(null);
case TypeCode.Double:
return this.ToDouble(null);
case TypeCode.Int16:
return this.ToInt16(null);
case TypeCode.Int32:
return this.ToInt32(null);
case TypeCode.Int64:
return this.ToInt64(null);
case TypeCode.Object:
if (typeof(HexString).Equals(conversionType))
return this;
throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name));
case TypeCode.SByte:
return this.ToSByte(null);
case TypeCode.Single:
return this.ToSingle(null);
case TypeCode.String:
return this.ToString(null);
case TypeCode.UInt16:
return this.ToUInt16(null);
case TypeCode.UInt32:
return this.ToUInt32(null);
case TypeCode.UInt64:
return this.ToUInt64(null);
default:
throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name));
public ushort ToUInt16(IFormatProvider provider)
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
Int32.Parse(hexString, NumberStyles.HexNumber)));
try {
return Convert.ToUInt16(UInt32.Parse(hexString, NumberStyles.HexNumber));
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt32(hexString, 16)), e);
public uint ToUInt32(IFormatProvider provider)
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
Int32.Parse(hexString, NumberStyles.HexNumber)));
return Convert.ToUInt32(hexString, 16);
public ulong ToUInt64(IFormatProvider provider)
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
Int32.Parse(hexString, NumberStyles.HexNumber)));
return Convert.ToUInt64(hexString, 16);
open System
open System.Globalization
open System.Text.RegularExpressions
type SignBit =
| Negative = -1
| Zero = 0
| Positive = 1
[<Struct>]
type HexString =
val mutable private hexString: string
val mutable Sign: SignBit
member this.Value
with get () = this.hexString
and set (value: string) =
if value.Trim().Length > 8 then
invalidArg "value" "The string representation of a 32 bit integer cannot have more than eight characters."
elif Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) |> not then
invalidArg "value" "The hexadecimal representation of a 32-bit integer contains invalid characters."
this.hexString <- value
interface IConvertible with
// IConvertible implementations.
member _.GetTypeCode() =
TypeCode.Object
member this.ToBoolean(provider: IFormatProvider) =
this.Sign <> SignBit.Zero
member this.ToByte(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Convert.ToInt32(this.hexString, 16)} is out of range of the Byte type.")
Byte.Parse(this.hexString, NumberStyles.HexNumber)
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToInt32(this.hexString, 16)} is out of range of the Byte type.", e) )
member this.ToChar(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Convert.ToInt32(this.hexString, 16)} is out of range of the Char type.")
let codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToChar codePoint
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToInt32(this.hexString, 16)} is out of range of the Char type.", e) )
member _.ToDateTime(provider: IFormatProvider) =
raise (InvalidCastException "Hexadecimal to DateTime conversion is not supported.")
member this.ToDecimal(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
let hexValue = Int32.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToDecimal hexValue
let hexValue = UInt32.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToDecimal hexValue
member this.ToDouble(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToDouble(Int32.Parse(this.hexString, NumberStyles.HexNumber))
Convert.ToDouble(UInt32.Parse(this.hexString, NumberStyles.HexNumber))
member this.ToInt16(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToInt16(Int32.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToInt32(this.hexString, 16)} is out of range of the Int16 type.", e) )
Convert.ToInt16(UInt32.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToInt32(this.hexString, 16)} is out of range of the Int16 type.", e) )
member this.ToInt32(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Int32.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToInt32(UInt32.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToInt32(this.hexString, 16)} is out of range of the Int32 type.", e) )
member this.ToInt64(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToInt64(Int32.Parse(this.hexString, NumberStyles.HexNumber))
Int64.Parse(this.hexString, NumberStyles.HexNumber)
member this.ToSByte(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToSByte(Int32.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Int32.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )
Convert.ToSByte(UInt32.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{UInt32.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )
member this.ToSingle(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToSingle(Int32.Parse(this.hexString, NumberStyles.HexNumber))
Convert.ToSingle(UInt32.Parse(this.hexString, NumberStyles.HexNumber))
member this.ToString(provider: IFormatProvider) =
"0x" + this.hexString
member this.ToType(conversionType: Type, provider: IFormatProvider) =
let this = this :> IConvertible
match Type.GetTypeCode conversionType with
| TypeCode.Boolean ->
this.ToBoolean null
| TypeCode.Byte ->
this.ToByte null
| TypeCode.Char ->
this.ToChar null
| TypeCode.DateTime ->
this.ToDateTime null
| TypeCode.Decimal ->
this.ToDecimal null
| TypeCode.Double ->
this.ToDouble null
| TypeCode.Int16 ->
this.ToInt16 null
| TypeCode.Int32 ->
this.ToInt32 null
| TypeCode.Int64 ->
this.ToInt64 null
| TypeCode.Object ->
if typeof<HexString>.Equals conversionType then
raise (InvalidCastException $"Conversion to a {conversionType.Name} is not supported.")
| TypeCode.SByte ->
this.ToSByte null
| TypeCode.Single ->
this.ToSingle null
| TypeCode.String ->
this.ToString null
| TypeCode.UInt16 ->
this.ToUInt16 null
| TypeCode.UInt32 ->
this.ToUInt32 null
| TypeCode.UInt64 ->
this.ToUInt64 null
| _ ->
raise (InvalidCastException $"Conversion to {conversionType.Name} is not supported.")
member this.ToUInt16(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Int32.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt16 type.")
Convert.ToUInt16(UInt32.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToInt32(this.hexString, 16)} is out of range of the UInt16 type.", e) )
member this.ToUInt32(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Int32.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
Convert.ToUInt32(this.hexString, 16)
member this.ToUInt64(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Int32.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt64 type.")
Convert.ToUInt64(this.hexString, 16)
Imports System.Globalization
Imports System.Text.RegularExpressions
Public Enum SignBit As Integer
Positive = 1
Zero = 0
Negative = -1
End Enum
Public Structure HexString : Implements IConvertible
Private signBit As SignBit
Private hexString As String
Public Property Sign As SignBit
signBit = value
End Set
Return signBit
End Get
End Property
Public Property Value As String
If value.Trim().Length > 8 Then
Throw New ArgumentException("The string representation of a 32-bit integer cannot have more than 8 characters.")
Else If Not Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) Then
Throw New ArgumentException("The hexadecimal representation of a 32-bit integer contains invalid characters.")
hexString = value
End If
End Set
Return hexString
End Get
End Property
' IConvertible implementations.
Public Function GetTypeCode() As TypeCode _
Implements IConvertible.GetTypeCode
Return TypeCode.Object
End Function
Public Function ToBoolean(provider As IFormatProvider) As Boolean _
Implements IConvertible.ToBoolean
Return signBit <> SignBit.Zero
End Function
Public Function ToByte(provider As IFormatProvider) As Byte _
Implements IConvertible.ToByte
If signBit = SignBit.Negative Then
Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt32(hexString, 16)))
Return Byte.Parse(hexString, NumberStyles.HexNumber)
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToUInt32(hexString, 16)), e)
End Try
End If
End Function
Public Function ToChar(provider As IFormatProvider) As Char _
Implements IConvertible.ToChar
If signBit = SignBit.Negative Then
Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt32(hexString, 16)))
End If
Dim codePoint As UInt16 = UInt16.Parse(Me.hexString, NumberStyles.HexNumber)
Return Convert.ToChar(codePoint)
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt32(hexString, 16)))
End Try
End Function
Public Function ToDateTime(provider As IFormatProvider) As Date _
Implements IConvertible.ToDateTime
Throw New InvalidCastException("Hexadecimal to DateTime conversion is not supported.")
End Function
Public Function ToDecimal(provider As IFormatProvider) As Decimal _
Implements IConvertible.ToDecimal
If signBit = SignBit.Negative Then
Dim hexValue As Integer = Int32.Parse(hexString, NumberStyles.HexNumber)
Return Convert.ToDecimal(hexValue)
Dim hexValue As UInteger = UInt32.Parse(hexString, NumberStyles.HexNumber)
Return Convert.ToDecimal(hexValue)
End If
End Function
Public Function ToDouble(provider As IFormatProvider) As Double _
Implements IConvertible.ToDouble
If signBit = SignBit.Negative Then
Return Convert.ToDouble(Int32.Parse(hexString, NumberStyles.HexNumber))
Return Convert.ToDouble(UInt32.Parse(hexString, NumberStyles.HexNumber))
End If
End Function
Public Function ToInt16(provider As IFormatProvider) As Int16 _
Implements IConvertible.ToInt16
If signBit = SignBit.Negative Then
Return Convert.ToInt16(Int32.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt32(hexString, 16)), e)
End Try
Return Convert.ToInt16(UInt32.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt32(hexString, 16)), e)
End Try
End If
End Function
Public Function ToInt32(provider As IFormatProvider) As Int32 _
Implements IConvertible.ToInt32
If signBit = SignBit.Negative Then
Return Int32.Parse(hexString, NumberStyles.HexNumber)
Return Convert.ToInt32(UInt32.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt32(hexString, 16)), e)
End Try
End If
End Function
Public Function ToInt64(provider As IFormatProvider) As Int64 _
Implements IConvertible.ToInt64
If signBit = SignBit.Negative Then
Return Convert.ToInt64(Int32.Parse(hexString, NumberStyles.HexNumber))
Return Int64.Parse(hexString, NumberStyles.HexNumber)
End If
End Function
Public Function ToSByte(provider As IFormatProvider) As SByte _
Implements IConvertible.ToSByte
If signBit = SignBit.Negative Then
Return Convert.ToSByte(Int32.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
Int32.Parse(hexString, NumberStyles.HexNumber), e))
End Try
Return Convert.ToSByte(UInt32.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
UInt32.Parse(hexString, NumberStyles.HexNumber)), e)
End Try
End If
End Function
Public Function ToSingle(provider As IFormatProvider) As Single _
Implements IConvertible.ToSingle
If signBit = SignBit.Negative Then
Return Convert.ToSingle(Int32.Parse(hexString, NumberStyles.HexNumber))
Return Convert.ToSingle(UInt32.Parse(hexString, NumberStyles.HexNumber))
End If
End Function
Public Overloads Function ToString(provider As IFormatProvider) As String _
Implements IConvertible.ToString
Return "0x" & Me.hexString
End Function
Public Function ToType(conversionType As Type, provider As IFormatProvider) As Object _
Implements IConvertible.ToType
Select Case Type.GetTypeCode(conversionType)
Case TypeCode.Boolean
Return Me.ToBoolean(Nothing)
Case TypeCode.Byte
Return Me.ToByte(Nothing)
Case TypeCode.Char
Return Me.ToChar(Nothing)
Case TypeCode.DateTime
Return Me.ToDateTime(Nothing)
Case TypeCode.Decimal
Return Me.ToDecimal(Nothing)
Case TypeCode.Double
Return Me.ToDouble(Nothing)
Case TypeCode.Int16
Return Me.ToInt16(Nothing)
Case TypeCode.Int32
Return Me.ToInt32(Nothing)
Case TypeCode.Int64
Return Me.ToInt64(Nothing)
Case TypeCode.Object
If GetType(HexString).Equals(conversionType) Then
Return Me
Throw New InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name))
End If
Case TypeCode.SByte
Return Me.ToSByte(Nothing)
Case TypeCode.Single
Return Me.ToSingle(Nothing)
Case TypeCode.String
Return Me.ToString(Nothing)
Case TypeCode.UInt16
Return Me.ToUInt16(Nothing)
Case TypeCode.UInt32
Return Me.ToUInt32(Nothing)
Case TypeCode.UInt64
Return Me.ToUInt64(Nothing)
Case Else
Throw New InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name))
End Select
End Function
Public Function ToUInt16(provider As IFormatProvider) As UInt16 _
Implements IConvertible.ToUInt16
If signBit = SignBit.Negative Then
Throw New OverflowException(String.Format("{0} is outside the range of the UInt16 type.", _
Int32.Parse(hexString, NumberStyles.HexNumber)))
Return Convert.ToUInt16(UInt32.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt32(hexString, 16)), e)
End Try
End If
End Function
Public Function ToUInt32(provider As IFormatProvider) As UInt32 _
Implements IConvertible.ToUInt32
If signBit = SignBit.Negative Then
Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
Int32.Parse(hexString, NumberStyles.HexNumber)))
Return Convert.ToUInt32(hexString, 16)
End If
End Function
Public Function ToUInt64(provider As IFormatProvider) As UInt64 _
Implements IConvertible.ToUInt64
If signBit = SignBit.Negative Then
Throw New OverflowException(String.Format("{0} is outside the range of the UInt64 type.", _
Int32.Parse(hexString, NumberStyles.HexNumber)))
Return Convert.ToUInt64(hexString, 16)
End If
End Function
End Structure
以下示例显示，对
ToUInt32(Object, IFormatProvider)
将 对象作为参数传递
HexString
的方法的调用反过来又调用
IConvertible.ToUInt32
类的
HexString
实现。
public class Example
public static void Main()
uint positiveValue = 320000000;
int negativeValue = -1;
HexString positiveString = new HexString();
positiveString.Sign = (SignBit) Math.Sign(positiveValue);
positiveString.Value = positiveValue.ToString("X4");
HexString negativeString = new HexString();
negativeString.Sign = (SignBit) Math.Sign(negativeValue);
negativeString.Value = negativeValue.ToString("X4");
try {
Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt32(positiveString));
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the UInt32 type.",
Int32.Parse(positiveString.Value, NumberStyles.HexNumber));
try {
Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt32(negativeString));
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the UInt32 type.",
Int32.Parse(negativeString.Value, NumberStyles.HexNumber));
// The example dosplays the following output:
// 0x1312D000 converts to 320000000.
// -1 is outside the range of the UInt32 type.
let positiveValue = 320000000u
let negativeValue = -1
let mutable positiveString = HexString()
positiveString.Sign <- Math.Sign positiveValue |> enum
positiveString.Value <- positiveValue.ToString "X4"
let mutable negativeString = HexString()
negativeString.Sign <- sign negativeValue |> enum
negativeString.Value <- negativeValue.ToString "X4"
printfn $"0x{positiveString.Value} converts to {Convert.ToUInt32 positiveString}."
with :? OverflowException ->
printfn $"{Int32.Parse(positiveString.Value, NumberStyles.HexNumber)} is outside the range of the UInt32 type."
printfn $"0x{negativeString.Value} converts to {Convert.ToUInt32 negativeString}."
with :? OverflowException ->
printfn $"{Int32.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt32 type."
// The example dosplays the following output:
// 0x1312D000 converts to 320000000.
// -1 is outside the range of the UInt32 type.
Module Example
Public Sub Main()
Dim positiveValue As UInt32 = 320000000
Dim negativeValue As Int32 = -1
Dim positiveString As New HexString()
positiveString.Sign = CType(Math.Sign(positiveValue), SignBit)
positiveString.Value = positiveValue.ToString("X4")
Dim negativeString As New HexString()
negativeString.Sign = CType(Math.Sign(negativeValue), SignBit)
negativeString.Value = negativeValue.ToString("X4")
Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt32(positiveString))
Catch e As OverflowException
Console.WriteLine("{0} is outside the range of the UInt32 type.", _
Int32.Parse(positiveString.Value, NumberStyles.HexNumber))
End Try
Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt32(negativeString))
Catch e As OverflowException
Console.WriteLine("{0} is outside the range of the UInt32 type.", _
Int32.Parse(negativeString.Value, NumberStyles.HexNumber))
End Try
End Sub
End Module
' The example dosplays the following output:
' 0x1312D000 converts to 320000000.
' -1 is outside the range of the UInt32 type.
返回值是调用
IConvertible.ToUInt32
基础类型的
value
方法的结果。
provider
使用户能够指定有关 的内容
value
的区域性特定转换信息。 例如，如果
value
是
String
表示数字的 ，
provider
则可提供有关用于表示该数字的表示法的区域性特定信息。
基类型忽略
provider
;但是，如果
value
是实现
IConvertible
接口的用户定义类型，可以使用 参数。
static System::UInt32 ToUInt32(System::UInt64 value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (ulong value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : uint64 -> uint32
Public Shared Function ToUInt32 (value As ULong) As UInteger
以下示例尝试将无符号长整型数组中的每个元素转换为无符号整数值。
ulong[] numbers = { UInt64.MinValue, 121, 340, UInt64.MaxValue };
uint result;
foreach (ulong number in numbers)
try {
result = Convert.ToUInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
number.GetType().Name, number);
// The example displays the following output:
// Converted the UInt64 value 0 to the UInt32 value 0.
// Converted the UInt64 value 121 to the UInt32 value 121.
// Converted the UInt64 value 340 to the UInt32 value 340.
// The UInt64 value 18446744073709551615 is outside the range of the UInt32 type.
let numbers = [| UInt64.MinValue; 121uL; 340uL; UInt64.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt32 type."
// The example displays the following output:
// Converted the UInt64 value '0' to the UInt32 value 0.
// Converted the UInt64 value '121' to the UInt32 value 121.
// Converted the UInt64 value '340' to the UInt32 value 340.
// The UInt64 value 18446744073709551615 is outside the range of the UInt32 type.
Dim numbers() As ULong = { UInt64.MinValue, 121, 340, UInt64.MaxValue }
Dim result As UInteger
For Each number As ULong In numbers
result = Convert.ToUInt32(number)
Console.WriteLine("Converted the {0} value {1} to a {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
number.GetType().Name, number)
End Try
' The example displays the following output:
' Converted the UInt64 value 0 to a UInt32 value 0.
' Converted the UInt64 value 121 to a UInt32 value 121.
' Converted the UInt64 value 340 to a UInt32 value 340.
' The UInt64 value 18446744073709551615 is outside the range of the UInt32 type.
static System::UInt32 ToUInt32(System::UInt32 value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (uint value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : uint32 -> uint32
Public Shared Function ToUInt32 (value As UInteger) As UInteger
static System::UInt32 ToUInt32(System::UInt16 value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (ushort value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : uint16 -> uint32
Public Shared Function ToUInt32 (value As UShort) As UInteger
以下示例将无符号 16 位整数数组中的每个元素转换为无符号整数值。
ushort[] numbers = { UInt16.MinValue, 121, 340, UInt16.MaxValue };
uint result;
foreach (ushort number in numbers)
result = Convert.ToUInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
// The example displays the following output:
// Converted the UInt16 value 0 to the UInt32 value 0.
// Converted the UInt16 value 121 to the UInt32 value 121.
// Converted the UInt16 value 340 to the UInt32 value 340.
// Converted the UInt16 value 65535 to the UInt32 value 65535.
let numbers = [| UInt16.MinValue; 121us; 340us; UInt16.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt32 type."
// The example displays the following output:
// Converted the UInt16 value '0' to the UInt32 value 0.
// Converted the UInt16 value '121' to the UInt32 value 121.
// Converted the UInt16 value '340' to the UInt32 value 340.
// The UInt16 value 4294967295 is outside the range of the UInt32 type.
Dim numbers() As UShort = { UInt16.MinValue, 121, 340, UInt16.MaxValue }
Dim result As UInteger
For Each number As UShort In numbers
result = Convert.ToUInt32(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
' The example displays the following output:
' Converted the UInt16 value 0 to the UInt32 value 0.
' Converted the UInt16 value 121 to the UInt32 value 121.
' Converted the UInt16 value 340 to the UInt32 value 340.
' Converted the UInt16 value 65535 to the UInt32 value 65535.
public:
static System::UInt32 ToUInt32(System::String ^ value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string? value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : string -> uint32
Public Shared Function ToUInt32 (value As String) As UInteger
下面的示例将字符串数组中的元素解释为数字字符串，并尝试将它们转换为无符号整数。
string[] values = { "One", "1.34e28", "-26.87", "-18", "-6.00",
" 0", "137", "1601.9", Int32.MaxValue.ToString() };
uint result;
foreach (string value in values)
try {
result = Convert.ToUInt32(value);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value '{1}' is outside the range of the UInt32 type.",
value.GetType().Name, value);
catch (FormatException) {
Console.WriteLine("The {0} value '{1}' is not in a recognizable format.",
value.GetType().Name, value);
// The example displays the following output:
// The String value 'One' is not in a recognizable format.
// The String value '1.34e28' is not in a recognizable format.
// The String value '-26.87' is not in a recognizable format.
// The String value '-18' is outside the range of the UInt32 type.
// The String value '-6.00' is not in a recognizable format.
// Converted the String value ' 0' to the UInt32 value 0.
// Converted the String value '137' to the UInt32 value 137.
// The String value '1601.9' is not in a recognizable format.
// Converted the String value '2147483647' to the UInt32 value 2147483647.
let values =
[| "1603"; "1,603"; "one"; "1.6e03"
"1.2e-02"; "-1326"; "1074122" |]
for value in values do
let result = Convert.ToUInt16 value
printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
| :? FormatException ->
printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
| :? OverflowException ->
printfn $"{value} is outside the range of the UInt32 type."
// The example displays the following output:
// Converted the String value '1603' to the UInt32 value 1603.
// The String value 1,603 is not in a recognizable format.
// The String value one is not in a recognizable format.
// The String value 1.6e03 is not in a recognizable format.
// The String value 1.2e-02 is not in a recognizable format.
// -1326 is outside the range of the UInt32 type.
// 1074122 is outside the range of the UInt32 type.
Dim values() As String = { "One", "1.34e28", "-26.87", "-18", "-6.00", _
" 0", "137", "1601.9", Int32.MaxValue.ToString() }
Dim result As UInteger
For Each value As String In values
result = Convert.ToUInt32(value)
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
value.GetType().Name, value, result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
value.GetType().Name, value)
Catch e As FormatException
Console.WriteLine("The {0} value '{1}' is not in a recognizable format.", _
value.GetType().Name, value)
End Try
' The example displays the following output:
' The String value 'One' is not in a recognizable format.
' The String value '1.34e28' is not in a recognizable format.
' The String value '-26.87' is not in a recognizable format.
' The String value -18 is outside the range of the UInt32 type.
' The String value '-6.00' is not in a recognizable format.
' Converted the String value ' 0' to the UInt32 value 0.
' Converted the String value '137' to the UInt32 value 137.
' The String value '1601.9' is not in a recognizable format.
' Converted the String value '2147483647' to the UInt32 value 2147483647.
ToUInt32(String)
使用 方法等效于将 传递给
value
UInt32.Parse(String)
方法。
value
通过使用当前区域性的格式设置约定进行解释。
如果希望在转换失败时不处理异常，可以改为调用
UInt32.TryParse
方法。 它返回一个
Boolean
值，该值指示转换是成功还是失败。
static System::UInt32 ToUInt32(System::SByte value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (sbyte value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : sbyte -> uint32
Public Shared Function ToUInt32 (value As SByte) As UInteger
以下示例尝试将有符号字节数组中的每个元素转换为无符号整数。
sbyte[] numbers = { SByte.MinValue, -1, 0, 10, SByte.MaxValue };
uint result;
foreach (sbyte number in numbers)
try {
result = Convert.ToUInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
number.GetType().Name, number);
// The example displays the following output:
// The SByte value -128 is outside the range of the UInt32 type.
// The SByte value -1 is outside the range of the UInt32 type.
// Converted the SByte value 0 to the UInt32 value 0.
// Converted the SByte value 10 to the UInt32 value 10.
// Converted the SByte value 127 to the UInt32 value 127.
let numbers = [| SByte.MinValue; -1y; 0y; 10y; SByte.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"{number} is outside the range of the UInt32 type."
// The example displays the following output:
// -128 is outside the range of the UInt32 type.
// -1 is outside the range of the UInt32 type.
// Converted the SByte value '0' to the UInt32 value 0.
// Converted the SByte value '10' to the UInt32 value 10.
// Converted the SByte value '127' to the UInt32 value 127.
Dim numbers() As SByte = { SByte.MinValue, -1, 0, 10, SByte.MaxValue }
Dim result As UInteger
For Each number As SByte In numbers
result = Convert.ToUInt32(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
number.GetType().Name, number)
End Try
' The example displays the following output:
' The SByte value -128 is outside the range of the UInt32 type.
' The SByte value -1 is outside the range of the UInt32 type.
' Converted the SByte value 0 to the UInt32 value 0.
' Converted the SByte value 10 to the UInt32 value 10.
' Converted the SByte value 127 to the UInt32 value 127.
static System::UInt32 ToUInt32(System::Byte value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (byte value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : byte -> uint32
Public Shared Function ToUInt32 (value As Byte) As UInteger
result = Convert.ToUInt32(byteValue);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
byteValue.GetType().Name, byteValue,
result.GetType().Name, result);
// The example displays the following output:
// Converted the Byte value 0 to the UInt32 value 0.
// Converted the Byte value 14 to the UInt32 value 14.
// Converted the Byte value 122 to the UInt32 value 122.
// Converted the Byte value 255 to the UInt32 value 255.
let bytes = [| Byte.MinValue; 14uy; 122uy; Byte.MaxValue |]
for byteValue in bytes do
let result = Convert.ToUInt16 byteValue
printfn $"Converted the {byteValue.GetType().Name} value '{byteValue}' to the {result.GetType().Name} value {result}."
// The example displays the following output:
// Converted the Byte value '0' to the UInt32 value 0.
// Converted the Byte value '14' to the UInt32 value 14.
// Converted the Byte value '122' to the UInt32 value 122.
// Converted the Byte value '255' to the UInt32 value 255.
Dim bytes() As Byte = { Byte.MinValue, 14, 122, Byte.MaxValue}
Dim result As UInteger
For Each byteValue As Byte In bytes
result = Convert.ToUInt32(byteValue)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
byteValue.GetType().Name, byteValue, _
result.GetType().Name, result)
' The example displays the following output:
' Converted the Byte value 0 to the UInt32 value 0.
' Converted the Byte value 14 to the UInt32 value 14.
' Converted the Byte value 122 to the UInt32 value 122.
' Converted the Byte value 255 to the UInt32 value 255.
static System::UInt32 ToUInt32(long value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (long value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : int64 -> uint32
Public Shared Function ToUInt32 (value As Long) As UInteger
以下示例尝试将长整型数组中的每个元素转换为无符号整数。
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
uint result;
foreach (long number in numbers)
try {
result = Convert.ToUInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
number.GetType().Name, number);
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the UInt32 type.
// The Int64 value -1 is outside the range of the UInt32 type.
// Converted the Int64 value 0 to the UInt32 value 0.
// Converted the Int64 value 121 to the UInt32 value 121.
// Converted the Int64 value 340 to the UInt32 value 340.
// The Int64 value 9223372036854775807 is outside the range of the UInt32 type.
let numbers = [| Int64.MinValue; -1; 0; 121; 340; Int64.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn "The {number.GetType().Name} value {number} is outside the range of the UInt32 type."
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the UInt32 type.
// The Int64 value -1 is outside the range of the UInt32 type.
// Converted the Int64 value '0' to the UInt32 value 0.
// Converted the Int64 value '121' to the UInt32 value 121.
// Converted the Int64 value '340' to the UInt32 value 340.
// The Int64 value 9223372036854775807 is outside the range of the UInt32 type.
Dim numbers() As Long = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue }
Dim result As UInteger
For Each number As Long In numbers
result = Convert.ToUInt32(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
number.GetType().Name, number)
End Try
' The example displays the following output:
' The Int64 value -9223372036854775808 is outside the range of the UInt32 type.
' The Int64 value -1 is outside the range of the UInt32 type.
' Converted the Int64 value 0 to the UInt32 value 0.
' Converted the Int64 value 121 to the UInt32 value 121.
' Converted the Int64 value 340 to the UInt32 value 340.
' The Int64 value 9223372036854775807 is outside the range of the UInt32 type.
static System::UInt32 ToUInt32(int value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (int value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : int -> uint32
Public Shared Function ToUInt32 (value As Integer) As UInteger
以下示例尝试将整数数组中的每个元素转换为无符号整数。
int[] numbers = { Int32.MinValue, -1203, 0, 121, 1340, Int32.MaxValue };
uint result;
foreach (int number in numbers)
try {
result = Convert.ToUInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
number.GetType().Name, number);
// The example displays the following output:
// The Int32 value -2147483648 is outside the range of the UInt32 type.
// The Int32 value -1203 is outside the range of the UInt32 type.
// Converted the Int32 value 0 to the UInt32 value 0.
// Converted the Int32 value 121 to the UInt32 value 121.
// Converted the Int32 value 1340 to the UInt32 value 1340.
// Converted the Int32 value 2147483647 to the UInt32 value 2147483647.
let numbers = [| Int32.MinValue; -1; 0; 121; 340; Int32.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn "The {number.GetType().Name} value {number} is outside the range of the UInt32 type."
// The example displays the following output:
// The Int32 value -2147483648 is outside the range of the UInt32 type.
// The Int32 value -1 is outside the range of the UInt32 type.
// Converted the Int32 value '0' to the UInt32 value 0.
// Converted the Int32 value '121' to the UInt32 value 121.
// Converted the Int32 value '340' to the UInt32 value 340.
// The Int32 value 2147483647 is outside the range of the UInt32 type.
Dim numbers() As Integer = { Int32.MinValue, -1203, 0, 121, 1340, Int32.MaxValue }
Dim result As UInteger
For Each number As Integer In numbers
result = Convert.ToUInt32(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
number.GetType().Name, number)
End Try
' The example displays the following output:
' The Int32 value -2147483648 is outside the range of the UInt32 type.
' The Int32 value -1203 is outside the range of the UInt32 type.
' Converted the Int32 value 0 to the UInt32 value 0.
' Converted the Int32 value 121 to the UInt32 value 121.
' Converted the Int32 value 1340 to the UInt32 value 1340.
' Converted the Int32 value 2147483647 to the UInt32 value 2147483647.
static System::UInt32 ToUInt32(short value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (short value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : int16 -> uint32
Public Shared Function ToUInt32 (value As Short) As UInteger
以下示例尝试将 16 位整数数组中的每个元素转换为无符号整数。
short[] numbers= { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue };
uint result;
foreach (short number in numbers)
try {
result = Convert.ToUInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
number.GetType().Name, number);
// The example displays the following output:
// The Int16 value -32768 is outside the range of the UInt32 type.
// The Int16 value -1 is outside the range of the UInt32 type.
// Converted the Int16 value 0 to the UInt32 value 0.
// Converted the Int16 value 121 to the UInt32 value 121.
// Converted the Int16 value 340 to the UInt32 value 340.
// Converted the Int16 value 32767 to the UInt32 value 32767.
let numbers = [| Int16.MinValue; -132s; 0s; 121s; 16103s; Int16.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt32 type."
// The example displays the following output:
// The Int16 value -32768 is outside the range of the UInt32 type.
// The Int16 value -132 is outside the range of the UInt32 type.
// Converted the Int16 value '0' to the UInt32 value 0.
// Converted the Int16 value '121' to the UInt32 value 121.
// Converted the Int16 value '16103' to the UInt32 value 16103.
// Converted the Int16 value '32767' to the UInt32 value 32767.
Dim numbers() As Short = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue }
Dim result As UInteger
For Each number As Short In numbers
result = Convert.ToUInt32(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
number.GetType().Name, number)
End Try
' The example displays the following output:
' The Int16 value -32768 is outside the range of the UInt32 type.
' The Int16 value -1 is outside the range of the UInt32 type.
' Converted the Int16 value 0 to the UInt32 value 0.
' Converted the Int16 value 121 to the UInt32 value 121.
' Converted the Int16 value 340 to the UInt32 value 340.
' Converted the Int16 value 32767 to the UInt32 value 32767.
static System::UInt32 ToUInt32(double value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (double value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : double -> uint32
Public Shared Function ToUInt32 (value As Double) As UInteger
以下示例尝试将值数组
Double
中的每个元素转换为无符号整数。
double[] values= { Double.MinValue, -1.38e10, -1023.299, -12.98,
0, 9.113e-16, 103.919, 17834.191, Double.MaxValue };
uint result;
foreach (double value in values)
try {
result = Convert.ToUInt32(value);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
value.GetType().Name, value);
// The example displays the following output:
// The Double value -1.79769313486232E+308 is outside the range of the UInt32 type.
// The Double value -13800000000 is outside the range of the UInt32 type.
// The Double value -1023.299 is outside the range of the UInt32 type.
// The Double value -12.98 is outside the range of the UInt32 type.
// Converted the Double value '0' to the UInt32 value 0.
// Converted the Double value '9.113E-16' to the UInt32 value 0.
// Converted the Double value '103.919' to the UInt32 value 104.
// Converted the Double value '17834.191' to the UInt32 value 17834.
// The Double value 1.79769313486232E+308 is outside the range of the UInt32 type.
let numbers =
[| Double.MinValue; -1.38e10; -1023.299; -12.98
0; 9.113e-16; 103.919; 17834.191; Double.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"{number} is outside the range of the UInt32 type."
// The example displays the following output:
// -1.79769313486232E+308 is outside the range of the UInt32 type.
// -13800000000 is outside the range of the UInt32 type.
// -1023.299 is outside the range of the UInt32 type.
// -12.98 is outside the range of the UInt32 type.
// Converted the Double value '0' to the UInt32 value 0.
// Converted the Double value '9.113E-16' to the UInt32 value 0.
// Converted the Double value '103.919' to the UInt32 value 104.
// Converted the Double value '17834.191' to the UInt32 value 17834.
// 1.79769313486232E+308 is outside the range of the UInt32 type.
Dim values() As Double = { Double.MinValue, -1.38e10, -1023.299, -12.98, _
0, 9.113e-16, 103.919, 17834.191, Double.MaxValue }
Dim result As UInteger
For Each value As Double In values
result = Convert.ToUInt32(value)
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
value.GetType().Name, value, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
value.GetType().Name, value)
End Try
' The example displays the following output:
' The Double value -1.79769313486232E+308 is outside the range of the UInt32 type.
' The Double value -13800000000 is outside the range of the UInt32 type.
' The Double value -1023.299 is outside the range of the UInt32 type.
' The Double value -12.98 is outside the range of the UInt32 type.
' Converted the Double value '0' to the UInt32 value 0.
' Converted the Double value '9.113E-16' to the UInt32 value 0.
' Converted the Double value '103.919' to the UInt32 value 104.
' Converted the Double value '17834.191' to the UInt32 value 17834.
' The Double value 1.79769313486232E+308 is outside the range of the UInt32 type.
public:
static System::UInt32 ToUInt32(System::Decimal value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (decimal value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : decimal -> uint32
Public Shared Function ToUInt32 (value As Decimal) As UInteger
以下示例尝试将值数组
Decimal
中的每个元素转换为无符号整数。
decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
199.55m, 9214.16m, Decimal.MaxValue };
uint result;
foreach (decimal value in values)
try {
result = Convert.ToUInt32(value);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
value.GetType().Name, value);
// The example displays the following output:
// The Decimal value -79228162514264337593543950335 is outside the range of the UInt32 type.
// The Decimal value -1034.23 is outside the range of the UInt32 type.
// The Decimal value -12 is outside the range of the UInt32 type.
// Converted the Decimal value '0' to the UInt32 value 0.
// Converted the Decimal value '147' to the UInt32 value 147.
// Converted the Decimal value '199.55' to the UInt32 value 200.
// Converted the Decimal value '9214.16' to the UInt32 value 9214.
// The Decimal value 79228162514264337593543950335 is outside the range of the UInt32 type.
let numbers =
[| Decimal.MinValue; -1034.23m; -12m; 0m; 147m; 9214.16m; Decimal.MaxValue |]
for number in numbers do
let result = Convert.ToUInt16 number
printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"{number} is outside the range of the UInt32 type."
// The example displays the following output:
// -79228162514264337593543950335 is outside the range of the UInt32 type.
// -1034.23 is outside the range of the UInt32 type.
// -12 is outside the range of the UInt32 type.
// Converted the Decimal value '0' to the UInt32 value 0.
// Converted the Decimal value '147' to the UInt32 value 147.
// Converted the Decimal value '9214.16' to the UInt32 value 9214.
// 79228162514264337593543950335 is outside the range of the UInt32 type.
Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
199.55d, 9214.16d, Decimal.MaxValue }
Dim result As UInteger
For Each value As Decimal In values
result = Convert.ToUInt32(value)
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
value.GetType().Name, value, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("{0} is outside the range of the UInt32 type.", _
value)
End Try
' The example displays the following output:
' -79228162514264337593543950335 is outside the range of the UInt32 type.
' -1034.23 is outside the range of the UInt32 type.
' -12 is outside the range of the UInt32 type.
' Converted the Decimal value '0' to the UInt32 value 0.
' Converted the Decimal value '147' to the UInt32 value 147.
' Converted the Decimal value '199.55' to the UInt32 value 200.
' Converted the Decimal value '9214.16' to the UInt32 value 9214.
' 79228162514264337593543950335 is outside the range of the UInt32 type.
static System::UInt32 ToUInt32(DateTime value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (DateTime value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : DateTime -> uint32
Public Shared Function ToUInt32 (value As DateTime) As UInteger
static System::UInt32 ToUInt32(char value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (char value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : char -> uint32
Public Shared Function ToUInt32 (value As Char) As UInteger
result = Convert.ToUInt32(ch);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
ch.GetType().Name, ch,
result.GetType().Name, result);
// The example displays the following output:
// Converted the Char value 'a' to the UInt32 value 97.
// Converted the Char value 'z' to the UInt32 value 122.
// Converted the Char value '' to the UInt32 value 7.
// Converted the Char value 'Ͽ' to the UInt32 value 1023.
// Converted the Char value '翿' to the UInt32 value 32767.
// Converted the Char value '' to the UInt32 value 65534.
let chars =
[| 'a'; 'z'; '\u0007'; '\u03FF'; '\u7FFF'; '\uFFFE' |]
for ch in chars do
let result = Convert.ToUInt16 ch
printfn $"Converted the {ch.GetType().Name} value '{ch}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"Unable to convert u+{int ch:X4} to a UInt16."
// The example displays the following output:
// Converted the Char value 'a' to the UInt32 value 97.
// Converted the Char value 'z' to the UInt32 value 122.
// Converted the Char value '' to the UInt32 value 7.
// Converted the Char value '?' to the UInt32 value 1023.
// Converted the Char value '?' to the UInt32 value 32767.
// Converted the Char value '?' to the UInt32 value 65534.
Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(1023), _
ChrW(Short.MaxValue), ChrW(&hFFFE) }
Dim result As UInteger
For Each ch As Char in chars
result = Convert.ToUInt32(ch)
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
ch.GetType().Name, ch, _
result.GetType().Name, result)
' The example displays the following output:
' Converted the Char value 'a' to the UInt32 value 97.
' Converted the Char value 'z' to the UInt32 value 122.
' Converted the Char value '' to the UInt32 value 7.
' Converted the Char value 'Ͽ' to the UInt32 value 1023.
' Converted the Char value '翿' to the UInt32 value 32767.
' Converted the Char value '' to the UInt32 value 65534.
static System::UInt32 ToUInt32(bool value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (bool value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : bool -> uint32
Public Shared Function ToUInt32 (value As Boolean) As UInteger
Console.WriteLine("{0} converts to {1}.", falseFlag,
Convert.ToUInt32(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
Convert.ToUInt32(trueFlag));
// The example displays the following output:
// False converts to 0.
// True converts to 1.
let falseFlag = false
let trueFlag = true
printfn $"{falseFlag} converts to {Convert.ToInt32 falseFlag}."
printfn $"{trueFlag} converts to {Convert.ToInt32 trueFlag}."
// The example displays the following output:
// False converts to 0.
// True converts to 1.
Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True
Console.WriteLine("{0} converts to {1}.", falseFlag, _
Convert.ToUInt32(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
Convert.ToUInt32(trueFlag))
' The example displays the following output:
' False converts to 0.
' True converts to 1.
public:
static System::UInt32 ToUInt32(System::Object ^ value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (object value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (object? value);
[<System.CLSCompliant(false)>]
static member ToUInt32 : obj -> uint32
Public Shared Function ToUInt32 (value As Object) As UInteger
以下示例尝试将对象数组中的每个元素转换为无符号整数。
object[] values = { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
"104", "103.0", "-1",
"1.00e2", "One", 1.00e2, 16.3e42};
uint result;
foreach (object value in values)
try {
result = Convert.ToUInt32(value);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
catch (OverflowException) {
Console.WriteLine("The {0} value '{1}' is outside the range of the UInt32 type.",
value.GetType().Name, value);
catch (FormatException) {
Console.WriteLine("The {0} value {1} is not in a recognizable format.",
value.GetType().Name, value);
catch (InvalidCastException) {
Console.WriteLine("No conversion to a UInt32 exists for the {0} value '{1}'.",
value.GetType().Name, value);
// The example displays the following output:
// Converted the Boolean value True to the UInt32 value 1.
// The Int32 value '-12' is outside the range of the UInt32 type.
// Converted the Int32 value 163 to the UInt32 value 163.
// Converted the Int32 value 935 to the UInt32 value 935.
// Converted the Char value x to the UInt32 value 120.
// No conversion to a UInt32 exists for the DateTime value '5/12/2009 12:00:00 AM'.
// Converted the String value 104 to the UInt32 value 104.
// The String value 103.0 is not in a recognizable format.
// The String value '-1' is outside the range of the UInt32 type.
// The String value 1.00e2 is not in a recognizable format.
// The String value One is not in a recognizable format.
// Converted the Double value 100 to the UInt32 value 100.
// The Double value '1.63E+43' is outside the range of the UInt32 type.
let values: obj[] =
[| true; -12; 163; 935; 'x'; DateTime(2009, 5, 12)
"104"; "103.0"; "-1"; "1.00e2"; "One"; 1.00e2 |]
for value in values do
let result = Convert.ToUInt16 value
printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
| :? OverflowException ->
printfn $"The {value.GetType().Name} value {value} is outside the range of the UInt32 type."
| :? FormatException ->
printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
| :? InvalidCastException ->
printfn $"No conversion to a UInt16 exists for the {value.GetType().Name} value {value}."
// The example displays the following output:
// Converted the Boolean value 'True' to the UInt32 value 1.
// The Int32 value -12 is outside the range of the UInt32 type.
// Converted the Int32 value '163' to the UInt32 value 163.
// Converted the Int32 value '935' to the UInt32 value 935.
// Converted the Char value 'x' to the UInt32 value 120.
// No conversion to a UInt16 exists for the DateTime value 5/12/2009 12:00:00 AM.
// Converted the String value '104' to the UInt32 value 104.
// The String value 103.0 is not in a recognizable format.
// The String value -1 is outside the range of the UInt32 type.
// The String value 1.00e2 is not in a recognizable format.
// The String value One is not in a recognizable format.
// Converted the Double value '100' to the UInt32 value 100.
Dim values() As Object = { True, -12, 163, 935, "x"c, #5/12/2009#, _
"104", "103.0", "-1", _
"1.00e2", "One", 1.00e2, 16.3e42}
Dim result As UInteger
For Each value As Object In values
result = Convert.ToUInt32(value)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
value.GetType().Name, value, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
value.GetType().Name, value)
Catch e As FormatException
Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
value.GetType().Name, value)
Catch e As InvalidCastException
Console.WriteLine("No conversion to a UInt32 exists for the {0} value {1}.", _
value.GetType().Name, value)
End Try
' The example displays the following output:
' Converted the Boolean value True to the UInt32 value 1.
' The Int32 value -12 is outside the range of the UInt32 type.
' Converted the Int32 value 163 to the UInt32 value 163.
' Converted the Int32 value 935 to the UInt32 value 935.
' Converted the Char value x to the UInt32 value 120.
' No conversion to a UInt32 exists for the DateTime value 5/12/2009 12:00:00 AM.
' Converted the String value 104 to the UInt32 value 104.
' The String value 103.0 is not in a recognizable format.
' The String value -1 is outside the range of the UInt32 type.
' The String value 1.00e2 is not in a recognizable format.
' The String value One is not in a recognizable format.
' Converted the Double value 100 to the UInt32 value 100.
' The Double value 1.63E+43 is outside the range of the UInt32 type.
返回值是调用
IConvertible.ToUInt32
的基础类型的
value
方法的结果。
推荐文章
|
|
沉稳的墨镜 · 《继园台七号》60年代香港的点点滴滴 1 月前 |