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HttpWebRequest hwrRequest = (HttpWebRequest)WebRequest.Create(argURL);
hwrRequest.Timeout =10000;
hwrResponse = (HttpWebResponse)hwrRequest.GetResponse();
if(hwrResponse.StatusCode=="404")
{
//404页面不存在
}
HttpWebRequest hwrRequest = (HttpWebRequest)WebRequest.Create(argURL);
hwrRequest.Timeout =10000;
hwrResponse = (HttpWebResponse)hwrRequest.GetResponse();