net读取url页面一

     HttpWebRequest httpReq ;
  HttpWebResponse httpResp ;
  Uri httpUrl = new Uri("http://www.178cpw.com//public/kj_getxml.php?cptype=ssc");
  httpReq = (HttpWebRequest)WebRequest.Create(httpUrl);
 
  httpResp = (HttpWebResponse)httpReq.GetResponse();
  Response.Write(getEncoding(httpResp));
        StreamReader reader = new StreamReader(httpResp.GetResponseStream(),System.Text.Encoding.Default);
 string sourceCode = reader.ReadToEnd();
 Response.Write(sourceCode);

 

 

 private string getEncoding (HttpWebResponse httpResp)
 {
   string contentType = httpResp.ContentType ;//类似“Content-Type: text/html; charset=utf-8;”或“Content-Type: text/html; charset=utf-8”或者“Content-Type: text/html”//注意utf-8后面有可能没有分号
   int i = contentType.IndexOf("charset=");
   if (i>=0)
   {
    i += 8;
    int j = contentType.IndexOf(';', i);
   if (j>=i)
   {
    return contentType.Substring(i,j-i).Trim();
   }
   return contentType.Substring(i);
  }
  return string.Empty;
 }