WP7中HttpWebRequest的使用方法之POST方式

　　　在WP7中的HttpWebRequest与在C#中的使用方式大致是一样的，但是在WP7中微软移去了同步的操作方式，所有的操作方式都改为异步，（提升用户体验，在请求过程中界面保持流畅）。

下面给出两种编码方式 ：其实都是一样的，只是第一种使用了独立方法的完成，（便于阅读和理解），第二种是直接用委托写在同一个方法里。

第一种：

 1  　　　　CookieContainer cc = null;
 2         private void button1_Click(object sender, RoutedEventArgs e)
 3         {
 4             string url = "http://www.cnblogs.com/xdpxyxy";
 5 
 6             HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(new Uri(url));
 7 
 8             if (cc == null)
 9             {
10                 cc = new CookieContainer();
11             }
12             myRequest.CookieContainer = cc;
13 
14             myRequest.Method = "POST";
15 
16             myRequest.ContentType = "application/x-www-form-urlencoded";
17 
18             myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest);
19 
20         }
21 
22         /// <summary>
23         ///  写入Stream的异步请求
24         /// </summary>
25         /// <param name="asynchronousResult"></param>
26         private void GetRequestStreamCallback(IAsyncResult asynchronousResult)
27         {
28 
29             HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
30 
31             System.IO.Stream postStream = request.EndGetRequestStream(asynchronousResult);
32 
33             //POST提交服务器的资源
34             string PostData = "";
35 
36             byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(PostData);
37 
38             postStream.Write(byteArray, 0, PostData.Length);
39 
40             postStream.Close();
41 
42             request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
43 
44         }
45 
46         /// <summary>
47         /// 对服务器资源异步请求
48         /// </summary>
49         /// <param name="asynchronousResult"></param>
50         private void GetResponseCallback(IAsyncResult asynchronousResult)
51         {
52 
53             HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
54 
55             HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
56 
57             Stream streamResponse = response.GetResponseStream();
58 
59             StreamReader streamRead = new StreamReader(streamResponse);
60 
61             string responseString = streamRead.ReadToEnd();
62 
63             streamRead.Close();
64 
65             streamResponse.Close();
66 
67         }

第二种 ：

 1 　　　　　　　HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(new Uri(PostUrl));
 2             httpWebRequest.ContentType = "application/x-www-form-urlencoded";
 3             httpWebRequest.Method = "POST";
 4             if (co == null)
 5             {
 6                 httpWebRequest.CookieContainer = new CookieContainer();
 7             }
 8             else
 9             {
10                 httpWebRequest.CookieContainer = co;
11             }
12             httpWebRequest.BeginGetRequestStream((IAsyncResult streamCallback) =>
13             {
14                 HttpWebRequest webRequest = streamCallback.AsyncState as HttpWebRequest;
15 
16                 byte[] buffer = Encoding.UTF8.GetBytes(PostData);
17                 Stream stream = webRequest.EndGetRequestStream(streamCallback);
18                 stream.Position = 0;
19                 stream.Write(buffer, 0, buffer.Length);
20                 stream.Close();
21                 webRequest.BeginGetResponse((IAsyncResult responseCallback) =>
22                 {
23                     HttpWebRequest webRequest2 = responseCallback.AsyncState as HttpWebRequest;
24                     HttpWebResponse webResponse = (HttpWebResponse)webRequest2.EndGetResponse(responseCallback);
25                     Stream streamResponse = webResponse.GetResponseStream();
26                     StreamReader sr = new StreamReader(streamResponse);
27                     string str = sr.ReadToEnd();
28                 }, webRequest);
29             }, httpWebRequest);

 

posted @ 2013-06-10 14:26  lhfly  阅读(2390)  评论(2)  编辑  收藏  举报