Marshal.WriteIntPtr 方法 (System.Runtime.InteropServices)

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public:
 static void WriteIntPtr(IntPtr ptr, IntPtr val);

[System.Security.SecurityCritical]
public static void WriteIntPtr (IntPtr ptr, IntPtr val);

public static void WriteIntPtr (IntPtr ptr, IntPtr val);

[<System.Security.SecurityCritical>]
static member WriteIntPtr : nativeint * nativeint -> unit

static member WriteIntPtr : nativeint * nativeint -> unit

Public Shared Sub WriteIntPtr (ptr As IntPtr, val As IntPtr)

// Allocate unmanaged memory. int elementSize = Marshal.SizeOf(typeof(IntPtr)); IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize); // Set the 10 elements of the C-style unmanagedArray for (int i = 0; i < 10; i++) Marshal.WriteIntPtr(unmanagedArray, i * elementSize, ((IntPtr)(i + 1))); Console.WriteLine("Unmanaged memory written."); Console.WriteLine("Reading unmanaged memory:"); // Print the 10 elements of the C-style unmanagedArray for (int i = 0; i < 10; i++) Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize)); Marshal.FreeHGlobal(unmanagedArray); Console.WriteLine("Done. Press Enter to continue."); Console.ReadLine();


   Sub ReadWriteIntPtr()
    ' Allocate unmanaged memory.
    Dim elementSize As Integer = Marshal.SizeOf(GetType(IntPtr))
    Dim unmanagedArray As IntPtr = Marshal.AllocHGlobal(10 * elementSize)
    ' Set the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, CType(i + 1, IntPtr))
    Next i
    Console.WriteLine("Unmanaged memory written.")
    Console.WriteLine("Reading unmanaged memory:")
    ' Print the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize))
    Next i
    Marshal.FreeHGlobal(unmanagedArray)
    Console.WriteLine("Done. Press Enter to continue.")
    Console.ReadLine()
End Sub
   
    
     WriteIntPtr
    
    允許與 Unmanaged C 樣式
    
     IntPtr
    
    陣列直接互動，不需要先將整個 Unmanaged 陣列複製 (使用
    
     Marshal.Copy
    
    ) 個別 Managed 陣列，再設定其元素值。
   
   
    支援寫入未配置的記憶體位置。
   
   public:
 static void WriteIntPtr(IntPtr ptr, int ofs, IntPtr val);
   [System.Security.SecurityCritical]
public static void WriteIntPtr (IntPtr ptr, int ofs, IntPtr val);
   public static void WriteIntPtr (IntPtr ptr, int ofs, IntPtr val);
   [<System.Security.SecurityCritical>]
static member WriteIntPtr : nativeint * int * nativeint -> unit
   static member WriteIntPtr : nativeint * int * nativeint -> unit
   Public Shared Sub WriteIntPtr (ptr As IntPtr, ofs As Integer, val As IntPtr)
   // Allocate unmanaged memory. 
    int elementSize = Marshal.SizeOf(typeof(IntPtr));
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);
    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, ((IntPtr)(i + 1)));
    Console.WriteLine("Unmanaged memory written.");
    Console.WriteLine("Reading unmanaged memory:");
    // Print the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize));
    Marshal.FreeHGlobal(unmanagedArray);
    Console.WriteLine("Done. Press Enter to continue.");
    Console.ReadLine();
   
    Sub ReadWriteIntPtr()
    ' Allocate unmanaged memory.
    Dim elementSize As Integer = Marshal.SizeOf(GetType(IntPtr))
    Dim unmanagedArray As IntPtr = Marshal.AllocHGlobal(10 * elementSize)
    ' Set the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, CType(i + 1, IntPtr))
    Next i
    Console.WriteLine("Unmanaged memory written.")
    Console.WriteLine("Reading unmanaged memory:")
    ' Print the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize))
    Next i
    Marshal.FreeHGlobal(unmanagedArray)
    Console.WriteLine("Done. Press Enter to continue.")
    Console.ReadLine()
End Sub
    
     這個方法會在 32 位系統上寫入 32 位整數，並在 64 位系統上寫入 64 位整數。
    
    
     
      WriteIntPtr
     
     允許與 Unmanaged C 樣式
     
      IntPtr
     
     陣列直接互動，不需要先將整個 Unmanaged 陣列複製 (使用
     
      Marshal.Copy
     
     ) 個別 Managed 陣列，再設定其元素值。
    
    
     支援寫入未配置的記憶體位置。
    
    public:
 static void WriteIntPtr(System::Object ^ ptr, int ofs, IntPtr val);
    [System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")]
[System.Security.SecurityCritical]
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
    [System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")]
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
    public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
    [System.Security.SecurityCritical]
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
    [<System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")>]
[<System.Security.SecurityCritical>]
static member WriteIntPtr : obj * int * nativeint -> unit
    [<System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")>]
static member WriteIntPtr : obj * int * nativeint -> unit
    static member WriteIntPtr : obj * int * nativeint -> unit
    [<System.Security.SecurityCritical>]
static member WriteIntPtr : obj * int * nativeint -> unit
    Public Shared Sub WriteIntPtr (ptr As Object, ofs As Integer, val As IntPtr)
    
     
      WriteIntPtr
     
     可讓您與 Unmanaged C 樣式的位元組陣列直接互動，避免在設定其元素值之前，先將
     
      Marshal.Copy
     
     整個 Unmanaged 陣列複製 ()  (。
    
    
     支援寫入未配置的記憶體位置。