Check if text file exists in ASP.NET

Question

I need to check if a text file exists on a site in another domain. URL could be:

http://sub.somedomain.com/blah/atextfile.txt 

I need to do this from code. I am trying to use an HttpWebRequest object but don't know how to do this.

EDIT: I am looking for an easy way to do this, as I will execute this logic every few seconds

Answer 1

 HttpWebRequest request = (HttpWebRequest)WebRequest.Create( "http://sub.somedomain.com/blah/atextfile.txt"); HttpWebResponse response = (HttpWebResponse)request.GetResponse(); if (response.StatusCode == HttpStatusCode.OK) { // FILE EXISTS! } response.Close(); 

Answer 2

You can probably use the method used here:

http://www.eggheadcafe.com/tutorials/aspnet/2c13cafc-be1c-4dd8-9129-f82f59991517/the-lowly-http-head-reque.aspx

Answer 3

Something like this might work for you:

 using (WebClient webClient = new WebClient()) { try { using (Stream stream = webClient.OpenRead("http://does.not.exist.com/textfile.txt")) { } } catch (WebException) { throw; } }