Easy Way To Email Errors From Your ASP.Net Site To You

Errors on your site are never good, but it's best when you know about them the second they happen rather than a user telling you- or worse- not telling you.

This is a quick a dirty method I use for emailing myself details about errors when they occur on my sites.

If you don't already have one, add a Global Application Class (Global.asax) to your site. It should come with a sub procedure named Application_Error, but if it doesn't go ahead and create one. In the code I've provided below, I use a custom email class I use to templatize my emails, but you can easily adapt it to any email class you choose.

Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
' Code that runs when an unhandled error occurs

Dim mm As New MMEmail()
mm.ToRecipients.Add("")
mm.Subject = "[ERROR] " & Request.Url.AbsoluteUri.ToString

Dim ex As Exception = Server.GetLastError().GetBaseException()
Dim body As String = ""

'Get URL where error occured
body &= "[URL]"
body &= "<br/>"
body &= Request.Url.AbsoluteUri.ToString
body &= "<br/>"
body &= "<br/>"

'Brief message of what went wrong and line where error occured in code.
body &= "[MESSAGE]"
body &= "<br/>"
body &= ex.Message.Replace(vbCrLf, "<br/>")
body &= "<br/>"
body &= "<br/>"

body &= "[SOURCE]"
body &= "<br/>"
body &= ex.Source.Replace(vbCrLf, "<br/>")
body &= "<br/>"
body &= "<br/>"

body &= "[STACK TRACE]"
body &= "<br/>"
body &= ex.StackTrace.Replace(vbCrLf, "<br/>")
body &= "<br/>"
body &= "<br/>"

mm.Body = body
mm.Send()
End Sub

Obviously, you'll need to add your email address in and use either the default email class or another class if you'd prefer. You'll need the email to be set up in the web.config - which may be another good topic I could touch on another time. And then, it wouldn't hurt to go intentionally create an error. I made a blank page with the on load function that calls a function s() which doesn't exist:
Public Sub Form_Load() Handles Me.Load
s()
End Sub