You can use the code in this tip to make web requests to a remote HTTP server and read the response:
try
{
// The URL http://www.microsoft.com/en/us/default.aspx
// is used here purely as an example.
// Substitute your own URL as needed.
Uri uri = new Uri("http://www.microsoft.com/en/us/default.aspx");
System.Net.HttpWebRequest httpWebRequest =
(System.Net.HttpWebRequest)
System.Net.HttpWebRequest.Create(targetUri);
if ((httpWebRequest.GetResponse().ContentLength > 0))
{
System.IO.StreamReader str = new System.IO.StreamReader(
httpWebRequest.GetResponse().GetResponseStream());
Response.Write(str.ReadToEnd());
if (str != null) str.Close();
}
}
catch (System.Net.WebException ex)
{
Response.Write("File does not exist.");
}