C# 主动发起请求代码

本文用于写代码是给提示

 1 private string GetHW(string uri)
 2 {
 3     string returnStr = "";
 4     HttpWebRequest hwRequest = (HttpWebRequest)System.Net.WebRequest.Create(uri);
 5     hwRequest.Method = "GET";
 6     HttpWebResponse hwRespone = (HttpWebResponse)hwRequest.GetResponse();
 7     if (hwRespone != null && hwRespone.StatusCode == HttpStatusCode.OK)
 8     {
 9         //流的处理有必要还有进行解压缩之类的
10         using (StreamReader sr = new StreamReader(hwRespone.GetResponseStream(), Encoding.UTF8))
11         {
12             returnStr = sr.ReadToEnd();
13         }
14     }
15     return returnStr;
16 }
17 
18 private string PostHW(string uri, string postString)
19 {
20     string returnStr = "";
21     HttpWebRequest hwRequest = (HttpWebRequest)System.Net.WebRequest.Create(uri);
22     hwRequest.Method = "Post";
23     hwRequest.ContentType = "application/x-www-form-urlencoded";  //设置ContntType ，这句很重要，否则无法传递参数
24 
25     byte[] postData = Encoding.UTF8.GetBytes(postString);//postData即为发送的数据
26     hwRequest.ContentLength = postData.Length;//设置客户端发送的内容长度
27 
28     Stream requestStream = hwRequest.GetRequestStream();//获取请求流
29     requestStream.Write(postData, 0, postData.Length);//把参数写入流
30     requestStream.Close();//关闭请求流
31 
32     HttpWebResponse hwRespone = (HttpWebResponse)hwRequest.GetResponse();
33     Stream responseStream = hwRespone.GetResponseStream();//得到回应流
34 
35     if (hwRespone != null && hwRespone.StatusCode == HttpStatusCode.OK)
36     {
37         using (StreamReader sr = new StreamReader(hwRespone.GetResponseStream(), Encoding.UTF8))
38         {
39             returnStr = sr.ReadToEnd();
40         }
41     }
42     responseStream.Close();//关闭回应流
43     return returnStr;
44 }
45 
46 private string GetWebClient(string uri)
47 {
48     string returnStr = "";
49     WebClient wCient = new System.Net.WebClient();
50     wCient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
51     using (StreamReader sr = new StreamReader(wCient.OpenRead(uri), Encoding.UTF8))
52     {
53         returnStr = sr.ReadToEnd();
54     }
55     return returnStr;
56 }
57 public string GetWebClient2(string uri)
58 {
59     uri = @"";
60     string returnStr = "";
61     WebClient wCient = new System.Net.WebClient();
62     wCient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
63     byte[] responseData = wCient.DownloadData(uri);
64     //using (StreamReader sr = new StreamReader(wCient.OpenRead(uri), Encoding.UTF8))
65     //{
66     //    returnStr = sr.ReadToEnd();
67     //}
68     returnStr = Encoding.UTF8.GetString(responseData);//返回接受的数据 
69     return returnStr;
70 }
71 
72 private string PostWebClient(string uri, string postString)
73 {
74     string returnStr = "";
75     //string postString = "userName=123&city=101";//设置参数，POST参数的格式是  参数1=值1&参数2=值2&参数3=值3 //PostString = "blog_title=博客标题&";PostString += "blog_body=博客内容&";PostString += "blog_class=1";//将参数字符串转换成字节数组。
76 
77     WebClient wCient = new System.Net.WebClient();
78     wCient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
79     byte[] postData = Encoding.ASCII.GetBytes(postString);
80     byte[] responseData = wCient.UploadData(uri, "POST", postData);//得到返回字符流  
81     returnStr = Encoding.UTF8.GetString(responseData);//返回接受的数据 
82     return returnStr;
83 }

 

 

posted @ 2014-04-21 16:59  X君  阅读(422)  评论(0)  编辑  收藏  举报