How to get ELMAH to include session values?

Question

NOTE: I know the various reasons to avoid using the session, but this is a project I\'ve inherited, so please skip that part of any replies :)

Since it\'s a solved probl

Answer 1

Rather than patching Elmah, I did this with Exception data. In Global.asax I inserted the extra data into the exception on Application_Error(). "HistoryStack" is my own class for recording user history, including button and tab clicks:

void Application_Error(object sender, EventArgs e)
{
    Exception ex = Server.GetLastError().GetBaseException();
    var stack = HistoryStack.Dump(); // essentially grabs data from the session
    ex.Data.Add("historyStack", stack);
}

Then, in ErrorMail_Mailing() I grabbed the data back and appended it in the email:

void ErrorMail_Mailing(object sender, Elmah.ErrorMailEventArgs e)
{
    var stack = e.Error.Exception.Data["historyStack"] as Stack;
    if (stack == null && e.Error.Exception.InnerException != null)
    {
        // could probably skip the first try and go straight to this assignment:
        stack = e.Error.Exception.InnerException.Data["historyStack"] as Stack;
    }

    if (stack != null && stack.Count > 0)
    {
        e.Mail.Body = e.Mail.Body + "
Browsing History
" + System.Environment.NewLine;
        while (stack.Count > 0)
        {
            e.Mail.Body = e.Mail.Body + stack.Pop() + "
" + System.Environment.NewLine;
        }
    }
}

Now this data is appended to the bottom of the email. No patches or extensions necessary.