How to get exception details on shared error.cshtml

Question

I am using ASPNet MVC4 with HandleErrorAttribute filter configured on Global.asax

public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
    filters.Add(new HandleErrorAttribute());
}

On my web.config I have configured customError mode to RemoteOnly:

<customErrors mode="RemoteOnly" />

So, the user are redirected to ~/Shared/Error.cshtml when a exception are raised on any View, that`s ok.

Now, I can catch this exception for log:

~/Shared/Error.cshtml code:

@{
    log4net.LogManager
      .GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType)
      .Fatal("Not captured exception", ex);
}

Actually this code are working fine (without EX parameter), but I need to improve my log including exception details.

How I can get exception details on this page?

Answer 1

I'd recommend writing a custom handler and log within, e.g.

[AttributeUsage(AttributeTargets.All, Inherited = true)]
public class HandleErrorAttributeCustom : HandleErrorAttribute
{

    public override void OnException(ExceptionContext context)
    {
                base.OnException(context);
           log4net.LogManager
          .GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType)
          .Fatal("Not captured exception", context.Exception);
    }
}

Answer 2

Just make your Error.cshtml view strongly typed to HandleErrorInfo which is the model being passed to this view by the HandleErrorAttribute:

@model System.Web.Mvc.HandleErrorInfo
@{
    log4net
        .LogManager
        .GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType)
        .Fatal("Not captured exception", Model.Exception);
}

And by the way, logging inside a view doesn't seem like the cleanest thing you could do. I'd rather write my custom error handler attribute and log the exception there.