利用WebRequest来实现模拟浏览器通过Post方式向服务器提交数据

核心提示：//通过Post发送的数据 string payload="chkbook=book&keyWord=管理"; WebRequest req = WebRequest.Create("http://localhost/pceo/Search.aspx"); req.Method

//通过Post发送的数据
　 string payload="chkbook=book&keyWord=管理";
　 WebRequest req = WebRequest.Create("http://localhost/pceo/Search.aspx");
　 req.Method = "POST";
　 req.ContentType = "application/x-www-form-urlencoded";
　 StringBuilder UrlEncoded = new StringBuilder();
　 Char[] reserved = {'?', '=', '&'};
　 byte[] SomeBytes = null;
　 if (payload != null)
　 {
　  int i=0, j;
　  while(i<payload.Length)
　  {
　　 j=payload.IndexOfAny(reserved, i);
　　 if (j==-1)
　　 {
　　  UrlEncoded.Append(HttpUtility.UrlEncode(payload.Substring(i, payload.Length-i),System.Text .Encoding .GetEncoding ("gb2312")));
　　  break;
　　 }
　　 UrlEncoded.Append(HttpUtility.UrlEncode(payload.Substring(i, j-i),System.Text .Encoding .GetEncoding ("gb2312")));
　　 UrlEncoded.Append(payload.Substring(j,1));
　　 i = j+1;
　  }
　  SomeBytes = Encoding.Default.GetBytes(UrlEncoded.ToString());
　  req.ContentLength = SomeBytes.Length;
　  Stream newStream = req.GetRequestStream();
　  newStream.Write(SomeBytes, 0, SomeBytes.Length);
　  newStream.Close();
　 }
　 else
　 {
　  req.ContentLength = 0;
　 }
　 try
　 {
　  WebResponse result = req.GetResponse();
　  Stream ReceiveStream = result.GetResponseStream();

　  Byte[] read = new Byte[512];
　  int bytes = ReceiveStream.Read(read, 0, 512);

　  txtHTML.InnerHtml = "";
　  while (bytes > 0)
　  {

// 注意：
　　 // 下面假定响应使用 UTF-8 作为编码方式。
　　 // 如果内容以 ANSI 代码页形式（例如，932）发送，则使用类似下面的语句：
　　 //  Encoding encode = System.Text.Encoding.GetEncoding("shift-jis");
　　 Encoding encode = System.Text.Encoding.GetEncoding("gb2312");
　　 txtHTML.InnerHtml = txtHTML.InnerHtml + encode.GetString(read, 0, bytes);
　　 bytes = ReceiveStream.Read(read, 0, 512);
　  }
　 }
　 catch(Exception)
　 {
　  txtHTML.InnerHtml = "检索页时出错";
　 }

出处：狂风之家 BLOG