[MVC]Real world error hadnling in ASP.NET MVC RC2.

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转载:http://blogs.microsoft.co.il/blogs/shay/archive/2009/03/06/real-world-error-hadnling-in-asp-net-mvc-rc2.aspx

I would like to share with You my ASP.NET MVC Error Handling solution after reading this question in stackoverflow.com 

Goal:

To catch every error that occures on server include HttpExeptions like 404 (Page not found).

The ability to choose a specific View (error Template) for some errors and a generic View/Behaviour if nor specific has been specified.
Scenario 1:
anonymus user typed a wrong url.
Actions:
display a user friendly message like: "OOPS, The page is missing… back to home"
Log the error to .log file on server.
Send email to admin.

Senario 2:
same as scenario 1 but one difference : user is anonymus but his IP is from our company office.
Actions:
show the detailed error.

Let's see some code:

 

Add this method to Global.asax:

protected void Application_Error(object sender, EventArgs e)
{
 
   Exception exception = Server.GetLastError();
 
 // Log the exception.
 ILogger logger = Container.Resolve<ILogger>();
 logger.Error(exception);
 
 Response.Clear();
 
 
 HttpException httpException = exception as HttpException;
 RouteData routeData = new RouteData();
 routeData.Values.Add("controller", "Error");
 
 if (httpException == null)
 {
      routeData.Values.Add("action", "Index");
 }
 else //It's an Http Exception, Let's handle it.
 {
 
  switch (httpException.GetHttpCode())
  {
    case 404:
      // Page not found.
      routeData.Values.Add("action", "HttpError404");
      break;
     case 500:
     // Server error.
       routeData.Values.Add("action", "HttpError500");
       break;
       // Here you can handle Views to other error codes.
        // I choose a General error template  
        default:
        routeData.Values.Add("action", "General");
        break;
     }
  }
 
 // Pass exception details to the target error View.
 routeData.Values.Add("error", exception);
 
 // Clear the error on server.
 Server.ClearError();
 
// Call target Controller and pass the routeData.
 IController errorController = new ErrorController();
 errorController.Execute(new RequestContext(
new HttpContextWrapper(Context), routeData));
 
}

Created a new controller called ErrorController:
You can specify some more behaviors to another eception types, I breated a view just for error: 404, 500.

 

    public ActionResult HttpError404(string error)
        {
            ViewData["Title"] = "Sorry, an error occurred while processing your request. (404)";
            ViewData["Description"] = error;
            return View("Index");
        }
 
        public ActionResult HttpError500(string error)
        {
            ViewData["Title"] = "Sorry, an error occurred while processing your request. (500)";
            ViewData["Description"] = error;
            return View("Index");
        }
 
 
        public ActionResult General(string error)
        {
            ViewData["Title"] = "Sorry, an error occurred while processing your request.";
            ViewData["Description"] = error;
            return View("Index");
        }

 

I attached an example project to this post.

 

Com

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