Determine the error that caused a redirect in ASP.NET

Question

Hello,

I have an ASP.NET web form application. In the web.config associated with this application, I handle my custom error like so:

<customErrors mode="Off" defaultRedirect="error.aspx" />

When a user gets to the error.aspx page, I want to determine what error caused this page to get reached. Does anyone know how I can do this?

Thank you!

Answer 1

You get the exception object with the GetLastError method:

Exception ex = Server.GetLastError();

(Copied straight out of the code of our error page, which has logged several million errors so far... :)

Answer 2

You can do it using Server.GetLastError Method

Exception LastError;
String ErrMessage;

LastError = Server.GetLastError();

if (LastError != null)
   ErrMessage = LastError.Message;
else
   ErrMessage = "No Errors";

Response.Write("Last Error = " + ErrMessage);