using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace WinFormsApp
///
/// C# HttpWebRequest 上传大文件
///
public class Class1
public static string ExecutePost(UploadParameterType parameter)
using (MemoryStream memoryStream = new MemoryStream())
// 1.分界线
string boundary = string.Format("----{0}", DateTime.Now.Ticks.ToString("x")), // 分界线可以自定义参数
beginBoundary = string.Format("--{0}\r\n", boundary),
endBoundary = string.Format("\r\n--{0}--\r\n", boundary);
byte[] beginBoundaryBytes = parameter.Encoding.GetBytes(beginBoundary),
endBoundaryBytes = parameter.Encoding.GetBytes(endBoundary);
// 2.组装开始分界线数据体 到内存流中
memoryStream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length);
// 3.组装 上传文件附加携带的参数 到内存流中
if (parameter.PostParameters != null && parameter.PostParameters.Count > 0)
foreach (KeyValuePair
keyValuePair in parameter.PostParameters)
string parameterHeaderTemplate = string.Format("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n{2}", keyValuePair.Key, keyValuePair.Value, beginBoundary);
byte[] parameterHeaderBytes = parameter.Encoding.GetBytes(parameterHeaderTemplate);
memoryStream.Write(parameterHeaderBytes, 0, parameterHeaderBytes.Length);
if (parameter.FileNameValue != null)//如果没有你文件则跳过本检测
//4.组装文件头数据体 到内存流中
string fileHeaderTemplate = string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: application/octet-stream\r\n\r\n", parameter.FileNameKey, parameter.FileNameValue);
byte[] fileHeaderBytes = parameter.Encoding.GetBytes(fileHeaderTemplate);
memoryStream.Write(fileHeaderBytes, 0, fileHeaderBytes.Length);
// 5.组装文件流 到内存流中
byte[] buffer = new byte[1024 * 1024 * 1];
int size = parameter.UploadStream.Read(buffer, 0, buffer.Length);
while (size > 0)
memoryStream.Write(buffer, 0, size);
size = parameter.UploadStream.Read(buffer, 0, buffer.Length);
// 6.组装结束分界线数据体 到内存流中
memoryStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
//7.获取二进制数据
byte[] postBytes = memoryStream.ToArray();
// 8.HttpWebRequest 组装
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(new Uri(parameter.Url, UriKind.RelativeOrAbsolute));
webRequest.Method = "POST";
webRequest.Timeout = 10000;
webRequest.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
webRequest.ContentLength = postBytes.Length;
if (Regex.IsMatch(parameter.Url, "^https://"))
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
ServicePointManager.ServerCertificateValidationCallback = CheckValidationResult;
// 9.写入上传请求数据
using (Stream requestStream = webRequest.GetRequestStream())
requestStream.Write(postBytes, 0, postBytes.Length);
requestStream.Close();
// 10.获取响应
using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
using (StreamReader reader = new StreamReader(webResponse.GetResponseStream(), parameter.Encoding))
string body = reader.ReadToEnd();
reader.Close();
return body;
static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
return true;
*、UploadParameterType.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace WinFormsApp
/// <summary>
/// 上传文件 - 请求参数类
/// </summary>
public class UploadParameterType
public UploadParameterType()
FileNameKey = "fileName";
Encoding = Encoding.UTF8;
PostParameters = new Dictionary<string, string>();
/// <summary>
/// 上传地址
/// </summary>
public string Url { get; set; }
/// <summary>
/// 文件名称key
/// </summary>
public string FileNameKey { get; set; }
/// <summary>
/// 文件名称value
/// </summary>
public string FileNameValue { get; set; }
/// <summary>
/// 编码格式
/// </summary>
public Encoding Encoding { get; set; }
/// <summary>
/// 上传文件的流
/// </summary>
public Stream UploadStream { get; set; }
/// <summary>
/// 上传文件 携带的参数集合
/// </summary>
public IDictionary<string, string> PostParameters { get; set; }
*
*
*、直接调用
using (FileStream fs = new FileStream(@"C:\\test.zip", FileMode.Open, FileAccess.Read))
Dictionary<string, string> postParameter = new Dictionary<string, string>();
postParameter.Add("name", "heshang");
postParameter.Add("param", "1 2 3");
string result = HttpUploadClient.Execute(new UploadParameterType
Url = url,
UploadStream = fs,
FileNameValue = "test.zip",
PostParameters = postParameter
public IHttpActionResult Post()
HttpPostedFile file = HttpContext.Current.Request.Files[0];
string pyPath = HttpContext.Current.Request["name"];
string Params = HttpContext.Current.Request["params"];
file.SaveAs("C:\\test.zip");
return Ok("");
*
*
*
*
*
这个小程序参考了另一位博友的代码，做了稍许调整，创建的两个Handler程序，一个上传的ashx，一个接收的ashx
上传文件代码
public void ProcessRequest(HttpContext context)
//参考http://www.cnblogs.com/greenerycn/archive/2010/05/15/csharp_http_post.htm
//form - data格式发送Post请求
Dictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("resp_type", "1");
dic.Add("upload_type", "1");
dic.Add("img_url", "http://www.jnqian
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using Newtonsoft.Json;
using System.IO;
using System.Net;
private static readonly string DefaultUserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64;.
var res = "";
HttpClient _httpClient = new HttpClient();
var postContent = new MultipartFormDataContent();
string boundary = string.Form...
