how to catch exception or error in Site.master view for ASP.NET MVC app?

Question

In site.master view, I have some inline code like:

<%=(ViewData["Name"] as Model).Name %>

If ViewData["Name"] is null, the code above will cause exception. Then I want to show the customized error view to user. What I did is set error mapping is web.config like:

   <customErrors mode="On" defaultRedirect="~/Error/Unknown">
        <error statusCode="404" redirect="~/Error/NotFound" />
        <error statusCode="403" redirect="~/Error/NoAccess" />
    </customErrors>

My Error controller is:

 public class ErrorController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        [AcceptVerbs(HttpVerbs.Get)]
        public ViewResult NotFound(string aspxerrorpath)
        {
            this.ViewData["HttpError::AspxErrorPath"] = aspxerrorpath;
            this.Response.StatusCode = (int)HttpStatusCode.NotFound;
            return this.View("NotFound");
        }

        [AcceptVerbs(HttpVerbs.Get)]
        public ViewResult NoAccess()
        {
            Response.StatusCode = (int)HttpStatusCode.Unauthorized;
            return View("NoAccess");
        }

        [AcceptVerbs(HttpVerbs.Get)]
        public ViewResult Unknown()
        {
            Response.StatusCode = (int)HttpStatusCode.InternalServerError;
            return View("Unknown");
        }
}

But I can't captch the error. I will get error in borwoser like

Server Error in '/' Application. Runtime Error ...

It means the error was not captured. How to resolve this problem?

Answer 1

Custom error pages in ASP.Net MVC are handled by the [HandleError] action filter attribute. For more information on how to use it, see ScottGu or Danny Tuppenny's blog posts about it.

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