Question

I am using Elmah in my MVC 2 project and everything works fine – except that Elmah is logging my background-image as an not implemented controller (see http://imageshack.us/photo/my-images/834/unbenannt1ak.png/).

This image is set in my css via

body
{
background: #d9dbea url('scanlines.png');
}

Why is this happening?

Answer 1

Ok I finally got this one…

It seems to be a “common” bug, that Elmah logs the favicon.ico if it is not located in your root directory. In order to overcome this problem you might create a filter as follows. I only had to add another filter rule so that Elmah does not log the scanlines.png (or just another image) as I said before. The filter rule is

<errorFilter>
<test>
  <and>
    <equal binding="HttpStatusCode" value="404" type="Int32" />
    <or>
      <regex binding="Context.Request.ServerVariables['URL']"
             pattern="/favicon\.ico(\z|\?)" />
      <regex binding="Context.Request.ServerVariables['URL']"
             pattern="/scanlines\.png(\z|\?)" />
      <regex binding="Context.Request.ServerVariables['URL']"
             pattern="/yourimage\.jpg(\z|\?)" />
    </or>
  </and>
</test>
</errorFilter>

With this you are able to block unwanted images logged by Elmah. Hope this might help someone 😉