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Outputting Debug Information via ASP

Whoever that has ever programmed a complex ASP page or application has faced the problem of not being able to debug the results. But there is a way we can easily output all the main variables that will allow us to see why we are not getting the desired results when the code is correct (no syntax errors).

The way to do it is including a file that displays the following information:

Session variables
Application variables
Request Form
Request QueryString
others...

Include file (debug.asp):

<% Dim IsDebug

                      IsDebug = True 'Enable

                      

                      If IsDebug = True Then %>

                      <BR><BR><BR><BR><BR><BR><BR><BR><BR><BR>

                      

                      <hr size=1 noshadow>

                      <b>Debug data:</b>

                      <TABLE><TR BGCOLOR="#C0C0C0"><TD
                      WIDTH="60%">

                      <B>Session:</B></TD><TD><B>Application:

                      </B></TD></TR><TR><TD>

                      <%

                      For each field in Session.Contents

                      Response.Write ("<B>" & field &
                      "</B>: " _

                      & Session.Contents(field) &
                      "<BR>")

                      Next

                      %>

                      </TD><TD valign=top>

                      <%

                      For each field in Application.Contents

                      Response.Write ("<B>" & field &
                      "</B>: " _

                      & Application.Contents(field) &
                      "<BR>")

                      Next

                      %>

                      </TD></TR>

                      </TABLE>

                      <TABLE width=100%><TR BGCOLOR="#C0C0C0"><TD
                      colspan=2><B>

                      GET/POST Data:</B></TD></TR>

                      </TABLE>

                      <TABLE>

                      <TR><TD>

                      <B>Action: </B><BR>

                      <B>CMD: </B><BR>

                      <B>QueryString: </B><BR>

                      <B>Form: </B>

                      </TD><TD>

                      <%= Request.Form ("Action") %><br>

                      <%= Request.QueryString ("cmd") %><br>

                      <%= Request.QueryString %><br>

                      <%= Request.Form %>

                      </TD></TR></TABLE>

                      

                      <% End If %>

Download the text file here.

Now we only need to add the following wherever we want to get all the data:

And that's all. I am sure you will find it very useful.