【后端C#】后台通过http post 调用 webservice 的方法

定义http post 调用webservice的某个方法

 1 /// <summary>    
 2     /// http post调用  webservice  
 3     /// </summary>    
 4     public static xmldocument test1_querypostwebservice(string url,
 5         string methodname, hashtable pars)
 6     {
 7         
 8  
 9  httpwebrequest request = (httpwebrequest)httpwebrequest.create(url + "/" + methodname);
10         request.method = "post";
11         request.contenttype = "application/x-www-form-urlencoded";
12         request.credentials = credentialcache.defaultcredentials;
13         request.timeout = 10000;
14  
15         #region 参数拼接成字符串，最后编码
16         stringbuilder sb = new stringbuilder();
17         foreach (string k in pars.keys)
18         {
19             if (sb.length > 0)
20             {
21                 sb.append("&");
22             }
23             sb.append(
24                 httputility.urlencode(k) + "="
25                 + httputility.urlencode(pars[k].tostring())
26                 );
27  
28         }
29         byte[] data = encoding.utf8.getbytes(sb.tostring());
30         #endregion
31  
32         #region  把编码后的参数写入请求流中
33         request.contentlength = data.length;
34         stream writer = request.getrequeststream();
35         writer.write(data, 0, data.length);
36         writer.close();
37         #endregion
38  
39         #region 读取结果，创建xmldocument对象，对象加载结果
40         var response = request.getresponse();
41         streamreader sr = new streamreader(response.getresponsestream(), encoding.utf8);
42         string retxml = sr.readtoend();
43         sr.close();
44         xmldocument doc = new xmldocument();
45         doc.loadxml(retxml);
46         #endregion 
47  
48   return doc;
49  
50  
51  
52     }
53  

调用实例：

 1 protected void page_load(object sender, eventargs e)
 2         {
 3             hashtable pars = new hashtable();
 4             string url = "http://localhost:63596/webservice1.asmx";
 5             pars["aa"] = "helenzhou";
 6             xmldocument doc = websvccaller.
 7                 test1_querypostwebservice(url,
 8                 "myhelloworld",
 9                 pars);
10             response.write(doc.outerxml); 
11         }