//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”; 
}