读取网页中内容的方法

 1 //从网页中读取结果数,返回搜索结果数
 2 public string ReturnCount(stringkeyword,stringinfoclass)
 3 {
 4     try
 5             {
 6                 string keyWord = this.GB2Unicode(keyword);
 7                 string infoClass = this.GB2Unicode(infoclass);
 8                 string mmmm = "";
 9                 string url = "http://www.search.hc360.com/cgi-bin/getcount?w=" + keyWord + "&c=" + infoClass + "&b=&s=&i=";
10                 
11                 WebRequest wreq = WebRequest.Create(url);
12                 HttpWebResponse wresp = (HttpWebResponse)wreq.GetResponse();
13                 Stream s = wresp.GetResponseStream();
14                 StreamReader sr = new StreamReader(s, System.Text.Encoding.GetEncoding("gb2312"));
15                 string temp = sr.ReadToEnd();
16                 //Response.Write(temp);
17                 string[] str = temp.Split(';');
18                 if (str[0] != null)
19                 {
20                     //HttpContext.Current.Response.Write(str[0].ToString());
21                     //Response.Write(str[0].Split(']')[0].Split('[')[1].ToString());
22                     mmmm += str[0].Split(']')[1].Split('=')[1].ToString();
23                 }
24                 else
25                 {
26                     mmmm += "134";
27                 }
28                 return mmmm;
29             }
30             catch
31             {
32                 return "100";
33             }
34            
35         }
36 
37 
38         //因为streamreader不支持中文,所以要通过这个方法,把中文转换成其支持的代码
39         public string GB2Unicode(string strSearch)
40         {
41             string Hexs = "";
42             string HH;
43             Encoding GB = Encoding.GetEncoding("GB2312");
44             Encoding unicode = Encoding.Unicode;
45 
46             byte[] GBBytes = GB.GetBytes(strSearch);
47             for (int i = 0; i < GBBytes.Length; i++)
48             {
49                 HH = "%" + GBBytes[i].ToString("x");
50                 Hexs += HH;
51             }
52             return Hexs;
53         }   
54