1 public string GetPage(string posturl, string postData)
 2         {
 3             Stream outstream = null;
 4             Stream instream = null;
 5             StreamReader sr = null;
 6             HttpWebResponse response = null;
 7             HttpWebRequest request = null;
 8             Encoding encoding = Encoding.UTF8;
 9             byte[] data = encoding.GetBytes(postData);
10             // 准备请求...
11             try
12             {
13                 // 设置参数
14                 request = WebRequest.Create(posturl) as HttpWebRequest;
15                 CookieContainer cookieContainer = new CookieContainer();
16                 request.CookieContainer = cookieContainer;
17                 request.AllowAutoRedirect = true;
18                 request.Method = "POST";
19                 request.ContentType = "application/x-www-form-urlencoded";
20                 request.ContentLength = data.Length;
21                 outstream = request.GetRequestStream();
22                 outstream.Write(data, 0, data.Length);
23                 outstream.Close();
24                 //发送请求并获取相应回应数据
25                 response = request.GetResponse() as HttpWebResponse;
26                 //直到request.GetResponse()程序才开始向目标网页发送Post请求
27                 instream = response.GetResponseStream();
28                 sr = new StreamReader(instream, encoding);
29                 //返回结果网页（html）代码
30                 string content = sr.ReadToEnd();
31                 string err = string.Empty;
32                 Response.Write(content);
33                 return content;
34             }
35             catch (Exception ex)
36             {
37                 string err = ex.Message;
38                 return string.Empty;
39             }
40         }