HttpWebRequest 问题

Question

部分代码：
public string  GetSource(string http) 
{HttpWebRequest HttpWReq = (HttpWebRequest)WebRequest.Create(http);
HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();
Stream resStream = HttpWResp.GetResponseStream(); 
StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);
string tempCode= sr.ReadToEnd();
resStream.Close(); 
sr.Close();
return tempCode;
}
如果我一次请求HttpWebRequest达到一定的数目：200次，就会报请求超时。
for(int i=0;i<200;i++)
{
 string temp=GetSource("www.sina.com?temp="+i+"");
}
请问在哪里设置 避免  报请求超时

Answer 1

HttpWebRequest是可以设置Timeout的HttpWReq.Timeout，或者用WebClient试试看/// <summary>
/// 抓取页面接口 - WebClient
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
private string getWebContent( string contenturl ) 
{ 
string str = "";
contenturl = contenturl.Replace("&amp;","&");
WebClient client = new WebClient();
client.Headers.Add("Accept","image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
client.Headers.Add("Accept-Language","zh-cn");
client.Headers.Add("UA-CPU","x86");
client.Headers.Add("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)");
try
{
byte[] buffer = client.DownloadData( contenturl ); 
if(Form1.encoding == "utf-8")
{
str = System.Text.Encoding.GetEncoding("utf-8").GetString( buffer, 0, buffer.Length ); 
}
else
{
str = System.Text.Encoding.GetEncoding("gb2312").GetString( buffer, 0, buffer.Length ); 
}
}
catch(Exception ex)
{
//MessageBox.Show(ex.Message);
} return str;
}