private bool RemoteFileExists(string fileUrl)///////////////////////////////////查看远程文件是不是存在
{
try
{
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.CreateDefault(new Uri(fileUrl));
httpWebRequest.Method = "HEAD";
httpWebRequest.Timeout = 1000;
return (((HttpWebResponse)httpWebRequest.GetResponse()).StatusCode == HttpStatusCode.OK);
}
catch
{
return false;
}
}