首先写客服端，winform模拟一个post提交：
/// <summary> /// 将本地文件上传到指定的处事器(HttpWebRequest要领) /// </summary> /// <param>文件上传到的处事器</param> /// <param>要上传的本地文件（全路径）</param> /// <param>文件上传后的名称</param> /// <param>上传进度条</param> /// <returns>告成返回1，掉败返回0</returns> private int Upload_Request2(string address, string fileNamePath, string saveName, ProgressBar progressBar) { int returnValue = 0; // 要上传的文件 FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read); BinaryReader r = new BinaryReader(fs); //时间戳 string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x"); byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n"); //请求头部信息 StringBuilder sb = new StringBuilder(); sb.Append("--"); sb.Append(strBoundary); sb.Append("\r\n"); sb.Append("Content-Disposition: form-data; name=\""); sb.Append("file"); sb.Append("\"; filename=\""); sb.Append(saveName); sb.Append("\";"); sb.Append("\r\n"); sb.Append("Content-Type: "); sb.Append("application/octet-stream"); sb.Append("\r\n"); sb.Append("\r\n"); string strPostHeader = sb.ToString(); byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader); // 按照uri创建HttpWebRequest东西 HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address)); httpReq.Method = "POST"; //对发送的数据不使用缓存 httpReq.AllowWriteStreamBuffering = false; //设置获得响应的超不时间（300秒） httpReq.Timeout = 300000; httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary; long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length; long fileLength = fs.Length; httpReq.ContentLength = length; try { progressBar.Maximum = int.MaxValue; progressBar.Minimum = 0; progressBar.Value = 0; //每次上传4k int bufferLength = 4096; byte[] buffer = new byte[bufferLength]; //已上传的字节数 long offset = 0; //开始上传时间 DateTime startTime = DateTime.Now; int size = r.Read(buffer, 0, bufferLength); Stream postStream = httpReq.GetRequestStream(); //发送请求头部动静 postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length); while (size > 0) { postStream.Write(buffer, 0, size); offset += size; progressBar.Value = (int)(offset * (int.MaxValue / length)); TimeSpan span = DateTime.Now - startTime; double second = span.TotalSeconds; lblTime.Text = "已用时：" + second.ToString("F2") + "秒"; if (second > 0.001) { lblSpeed.Text = "平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒"; } else { lblSpeed.Text = " 正在连接…"; } lblState.Text = "已上传：" + (offset * 100.0 / length).ToString("F2") + "%"; lblSize.Text = (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M"; Application.DoEvents(); size = r.Read(buffer, 0, bufferLength); } //添加尾部的时间戳 postStream.Write(boundaryBytes, 0, boundaryBytes.Length); postStream.Close(); //获取处事器真个响应 WebResponse webRespon = httpReq.GetResponse(); Stream s = webRespon.GetResponseStream(); //读取处事器端返回的动静 StreamReader sr = new StreamReader(s); String sReturnString = sr.ReadLine(); s.Close(); sr.Close(); if (sReturnString == "Success") { returnValue = 1; } else if (sReturnString == "Error") { returnValue = 0; } } catch { returnValue = 0; } finally { fs.Close(); r.Close(); } return returnValue; }
参数说明如下：
fileNamePath：要上传的本地文件，如：D:\test.rar
saveName：文件上传随处事器后的名称，如：200901011234.rar
progressBar：显示文件上传进度的进度条。
接收文件的WebForm添加一个Save.aspx页面，Load要领如下：