Global Error Handling In Mvc3

Contents Mvc 5 Error Handling Exception Handling In Mvc 4 Razor Mvc Exception Filter Exception Filter In Mvc 4

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Mvc 5 Error Handling

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Exception Handling In Mvc 4 Razor

each other. Join them; it only takes a minute: Sign up What is best practice for global error/exception handling in ASP.NET MVC? up vote 4 down vote favorite 1 I've seen two methods of implementing global error handling in an ASP.NET MVC 3 application. One method is via the Application_Error method in Global.asax.cs. For example (Error Handling in mvc error logging global.asax): public class SomeWebApplication : System.Web.HttpApplication { // ... other methods ... protected void Application_Error() { // ... application error handling code ... } } The other method is via a [HandleError] action filter attribute registered in the RegisterGlobalFilters method, again in Global.asax.cs. Which is the better way to approach this? Are there any significant disadvantages to either approach? asp.net-mvc-3 exception-handling share|improve this question edited Jan 4 '13 at 21:48 Shannon Wagner 271623 asked Sep 22 '11 at 8:23 dan 2,33973252 add a comment| 1 Answer 1 active oldest votes up vote 7 down vote accepted [HandleError] is the way to go since it keeps everything simple and responsibility is clear. This action filter is a specific ASP.NET MVC feature and therefore is the official way of handling errors. It's also quite easy to override the filter to add custom functionality. Application_Error is the old way to do it and doesn't really belong in MVC. The [HandleError] attribute works fine as long as you remember to tag your controllers (or the b

Effectively in ASP.NET MVC 10 April 2014Handling Errors Effectively in ASP.NET MVCASP.NET MVC gives you more options in the way that you

Mvc Exception Filter

handle exceptions. Error handling isn't intrinsically exciting, but there are many ways

Exception Filter In Mvc 4

of avoiding the classic yellow page of death, even getting ELMAH to manage error handling for you. 79 3 exception filter in mvc 5 Dino Esposito Years ago, ASP.NET's error handling was one of the major things that made me wonder if ASP.NET MVC could give me something that ASP.NET Web Forms couldn't. Web Forms http://stackoverflow.com/questions/7511752/what-is-best-practice-for-global-error-exception-handling-in-asp-net-mvc is based on pages; so if something goes wrong, all that you can do is to redirect the user to another page and explain what the error was or just be generically sorry. ASP.NET Web Forms allow you to map an error page for each possible HTTP status code. You control the mapping through the section of the web.config file. Because of https://www.simple-talk.com/dotnet/asp-net/handling-errors-effectively-in-asp-net-mvc/ the different architecture of the view in ASP.NET MVC, it is possible to save the redirect command and then programmatically switch to an error view in the context of the same request. You have this in addition to the regular page-based error handling mechanism. I wouldn't use HTTP code redirects in ASP.NET MVC; but only because more flexible solutions are possible. Generally speaking, error handling in ASP.NET MVC is mainly necessary to handle program and route exceptions. Program exceptions refer to catching errors in controllers and in any code you may have in Razor views. Route exceptions refer to missing links and invalid URLs. Program Exceptions Any stack trace you can have out of an ASP.NET MVC application originates from a method call in a controller class. The controller class, therefore, is where any exceptions in your ASP.NET MVC code can be trapped. You can do that in a number of equivalent ways. For example, you can have a try/catch block surrounding the entire method body. It works, but it's ugly to see too. A better option is probably to override the OnException method from the

on October 21, 2011 by Tony Sneed Download the code for this blog post. In my last blog post I explained how to decouple infrastructure concerns, such as logging, from the rest of your https://blog.tonysneed.com/2011/10/21/global-error-handling-in-asp-net-mvc-3-with-ninject/ application using a Dependency Injection container, such as Ninject. I implemented an ILoggingService interface with an open-source logger called NLog. In this post I will show you how to implement centralized error handling in an https://blogs.msdn.microsoft.com/gduthie/2011/03/17/get-to-know-action-filters-in-asp-net-mvc-3-using-handleerror/ ASP.NET MVC 3 application, so that you can handle exceptions in one place, where you can perform logging as well as display a custom error page. One of the worst things you can do to in mvc handle errors is place a try / catch block in every action of every controller. Not only does it clutter the app with unnecessary code, it creates the possibility that you or another developer will forget to place the try / catch on an action and an unexpected exception will slip through. A better approach is to handle exceptions in one place through an interception mechanism. ASP.NET MVC allows you to handling in mvc hook into the request pipeline by defining an Action Filter. In fact, one such filter that comes out of the box is a HandleError attribute. While it allows you to direct users to a particular view when certain errors occur, you cannot use it to log the exception. The other problem is that you would have to place the attribute on every controller in your application – not much of an improvement over a proliferation of try / catch’s. It turns out, however, that implementing IExceptionFilter is quite easy (especially if you use Reflector to reverse engineer HandleErrorAttribute ). The difference is that you can add a constructor which accepts an ILoggingService interface and is injected into the filter by your DI container. The nice thing about Ninject is that there is an extension for MVC3 apps, which you can easily add as a NuGet package. After installing the package, you get a NinjectMVC3.cs file placed in an App_Start folder with bootstrapping code. There you can load a Ninject module for binding the ILoggingSservice to a concrete implementation. I had to hunt for the source code and documentation for the Ninject.MVC3 extension, but I eventually found it here on Github. I implemented IExceptionFilter in a HandleExceptionFilter class, which performs l

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Update – for folks who learn best visually, I’ve posted a follow-up screencast of the demo steps discussed below, as a DevNuggets video. You can view the video here. What’s an Action Filter? If you’re just getting started with ASP.NET MVC, you may have heard of something called action filters, but haven’t had the chance to use them yet. Action filters provide a convenient mechanism for attaching code to your controllers and/or action methods that implements what are referred to as cross-cutting concerns, that is, functionality that isn’t specific to one particular action method, but rather is something you’d want to re-use across multiple actions. An action filter is a .NET class that inherits from FilterAttribute or one of its subclasses, usually ActionFilterAttribute, which adds the OnActionExecuting, OnActionExecuted, OnResultExecuting, and OnResultExecuted methods, providing hooks for code to be executed both before and after the action and result are processed. Because action filters are subclasses of the System.Attribute class (via either FilterAttribute or one of its subclasses), they can be applied to your controllers and action methods using the standard .NET metadata attribute syntax: C#: 1: [MyNamedAttribute(MyParam = MyValue)] 2: public ActionResult MyActionMethod() 3: { 4: // do stuff 5: } VB: 1: _ 2: Public Function MyActionMethod() As ActionResult 3: ' do stuff 4: End Function This makes action filters an easy way to add frequently-used functionality to your controllers and action methods, without intruding into the controller code, and without unnecessary repetition. To be clear, action filters aren’t new to MVC 3, but there’s a new way to apply them in MVC 3 that I’ll discuss later on in this post. What’s in the Box? ASP.NET MVC provides several action filters out of the box: Authorize – checks to see whether the current user is logged in, and matches a provided username or role name (or names), and if not it returns a 401 status, which in turn invokes the configured authentication provider.