public string GetPage(string posturl, string postData)

{

Stream outstream = null;

Stream instream = null;

StreamReader sr = null;

HttpWebResponse response = null;

HttpWebRequest request = null;

Encoding encoding = Encoding.UTF8;

byte[] data = encoding.GetBytes(postData);

// 准备请求...

try

{

// 设置参数

request = WebRequest.Create(posturl) as HttpWebRequest;

CookieContainer cookieContainer = new CookieContainer();

request.CookieContainer = cookieContainer;

request.AllowAutoRedirect = true;

request.Method = "POST";

request.ContentType = "application/x-www-form-urlencoded";

request.ContentLength = data.Length;

outstream = request.GetRequestStream();

outstream.Write(data, 0, data.Length);

outstream.Close();

//发送请求并获取相应回应数据

response = request.GetResponse() as HttpWebResponse;

//直到request.GetResponse()程序才开始向目标网页发送Post请求

instream = response.GetResponseStream();

sr = new StreamReader(instream, encoding);

//返回结果网页（html）代码

string content = sr.ReadToEnd();

string err = string.Empty;

return content;

}

catch (Exception ex)

{

string err = ex.Message;

Response.Write(err);

return string.Empty;

}

}