C# Http+post方式上传文件的源码 实现文件浏览的功能

文件附件自己下载吧

Http+post方式上传文件.rar

 

下面是部分的源码

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; using System.Net;   namespace WindowsFormsApplication3 {     public partial class Form1 : Form     {         public Form1()         {             InitializeComponent();         }           private void button1_Click(object sender, EventArgs e)         {             Upload_Request("http://localhost:3036/WebSite6/Default.aspx", System.Environment.CurrentDirectory + "\1.docx", "1.docx", this.progressBar1);         }           //         /// 将本地文件上传到指定的服务器(HttpWebRequest方法)         ///         ///文件上传到的服务器         ///要上传的本地文件（全路径）         ///文件上传后的名称         ///上传进度条         ///成功返回1，失败返回0         private int Upload_Request(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(" --" + strBoundary + " ");               //请求头部信息             StringBuilder sb = new StringBuilder();             sb.Append("--");             sb.Append(strBoundary);             sb.Append(" ");             sb.Append("Content-Disposition: form-data; name="");             sb.Append("file");             sb.Append(""; filename="");             sb.Append(saveName);             sb.Append(""");             sb.Append(" ");             sb.Append("Content-Type: ");             sb.Append("application/octet-stream");             sb.Append(" ");             sb.Append(" ");             string strPostHeader = sb.ToString();             byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);               // 根据uri创建HttpWebRequest对象             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;               //设置获得响应的超时时间（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();                   //发送请求头部消息                 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();                   //获取服务器端的响应                 WebResponse webRespon = httpReq.GetResponse();                 Stream s = webRespon.GetResponseStream();                 StreamReader sr = new StreamReader(s);                   //读取服务器端返回的消息                 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;         }       } }