Check if an image file exists before linking in ASP

Hello everyone,

I have two websites. One internal and one external. Now all images are located in an externate website and I want to keep them there. I want to link images to products which are available on the external website. Priort to using the <img src=> I want to check it an image exists. If not I wont to display another image.

I was successfull in finding some Java script code out there but it always returns no image.

Here is what I got:

<script language="javascript">
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("<%=response.write(IMGURL)%>");
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)
<%IMGURL=IMGURL%>;
else
<%IMGURL = "http://www.hinkleylighting.com/images/products/na.gif"%>;
}
catch(WebException ex)
{
// Handle DSN error.
System.Diagnostics.Debug.WriteLine("Name resolution error: " + ex.ToString());
}
</script>

Any ideas?
Thanks.

 

I don't do ASP, but if <%IMGURL> returns html, you would need to use document.write("<%IMGURL=url>"); otherwise the script wouldn't work. Also, if the url tag used double quotes, you would need to use single quotes, unless they are in the file name, in which case you should use an ASP function to add slashes to the special characters, or choose one kind of quote, and replace each of it's occurances with one after a backslash. If you can open the JavaScript console (not Java Console) you can see if there are any errors like this. (In IE, double-click on the error icon in left side of status bar, some browsers accept this url: "javascript:".)

 

That looks remarkably like C# and NOT javascript..