Setting errorPage in Umbraco

Question

I am developing a web application using Umbraco. I create a content called PageNotFound and, in the errors section of umbracoSettings.config file, I put the node id of that

Answer 1

The 500 errors did not work until I added

existingResponse="Replace"

like that

<httpErrors errorMode="Custom" existingResponse="Replace">
  <remove statusCode="404" subStatusCode="-1" />
  <remove statusCode="500" subStatusCode="-1" />
  <error statusCode="404" path="/non-existing-page.aspx" responseMode="ExecuteURL" />
  <error statusCode="500" path="error.html" responseMode="File" />
</httpErrors>

Answer 2

In your web.config (system.webServer section) you can tell the site to pass all of the error handling through to the application:

<httpErrors existingResponse="PassThrough" />

This has the disadvantage that Umbraco doesn't handle anything but .aspx pages that are not found.

You could make it better by doing something like this instead:

<httpErrors errorMode="Custom">
       <remove statusCode="404" subStatusCode="-1" />
       <error statusCode="404" prefixLanguageFilePath="" path="/non-existing-page.aspx" responseMode="ExecuteURL" />
</httpErrors>

The non-existing-page.aspx does not exist yet in Umbraco, so it triggers a 404 (because it has the aspx extension) and.. presto: Umbraco handles the 404 perfectly!