Can i detect if a file on another web site exist?

Can httpRequest help me with this?

[FwAnK]

I want the user to send me the url to an image but i'd like to check if it exist.

How can i do this in asp.net?

Thank-you,

[threecrans]

HttpRequest seems like a good way to me. The following code worked fine here (although it CERTAINLY could be made more robust).

HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://www.yahoo.com/image.gif");
req.AllowAutoRedirect = false; // In case the server is configured to redirect on 404
try
{
 // Get response from the server
 HttpWebResponse res = (HttpWebResponse)req.GetResponse();
 // Check response code
 if(res.StatusCode == HttpStatusCode.OK)
 System.Diagnostics.Debug.WriteLine("File is accessable");
 else
 System.Diagnostics.Debug.WriteLine("File is not accessable");
}
catch(WebException ex)
{
 // Handle DSN error.
 System.Diagnostics.Debug.WriteLine("Name resolution error: " + ex.ToString());
}