C# 判断远程文件是否存在

#region 判断远程文件是否存在
/// <summary>
/// 判断远程文件是否存在
/// </summary>
/// <param name="fileUrl"></param>
/// <returns></returns>
public static bool RemoteFileExists(string fileUrl)
{
HttpWebRequest re = null;
HttpWebResponse res = null;
try
{
re = (HttpWebRequest)WebRequest.Create(fileUrl);
res = (HttpWebResponse)re.GetResponse();
if (res.ContentLength != 0)
{
//MessageBox.Show("文件存在");
return true;
}
}
catch (Exception)
{
//MessageBox.Show("无此文件");
return false;
}
finally
{
if (re != null)
{
re.Abort();//销毁关闭连接
}
if (res != null)
{
res.Close();//销毁关闭响应
}
}
return false;
}
#endregion