Question

I trying to do something like that

First, Create a new mvc 3 project in visual studio 2010

Next, Turning on the custom error in the Views\Shared\Web.config

 <system.web>
    <customErrors mode="On"/>
 ...

And then, I put the Tag in the Index ActionResult, Home Controller

Public Class HomeController
    Inherits System.Web.Mvc.Controller


    <HandleError()> _
    Function Index() As ActionResult
        ViewData("Message") = "Welcome to ASP.NET MVC!"
        Throw New InvalidOperationException
        Return View()
    End Function

    Function About() As ActionResult
        Return View()
    End Function



End Class

Finally run the app, and always show the yellow message error. I review a lot of examples and always indicated that is correct, but doesn’t work.

I appreciate your help

Answer 1

You should do this in the main ~/web.config file, not the one in ~/Views/Shared/Web.config:

<system.web>
    <customErrors mode="On"/>
    ...
</system.web>

Also ensure that ~/Views/Shared/Error.cshtml is present as this will be the rendered view in case of an exception.

And you no longer need to decorate your controller with the <HandleError()> attribute as ASP.NET MVC 3 uses a global filter for this.