Error Handler In Asp.net Mvc
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it as part of our official documentation for implementing custom error pages, we've decided to sponsor it. Visit elmah.io - Error Management for .NET web applications using ELMAH, powerful search, integrations with Slack aspnet mvc nuget and HipChat, Visual Studio integration, API and much more. Custom error pages and
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global error logging are two elementary and yet very confusing topics in ASP.NET MVC 5. There are numerous ways aspnet mvc tutorial of implementing error pages in ASP.NET MVC 5 and when you search for advice you will find a dozen different StackOverflow threads, each suggesting a different implementation. Overview What is the goal?
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Typically good error handling consists of: Human friendly error pages Custom error page per error code (e.g.: 404, 403, 500, etc.) Preserving the HTTP error code in the response to avoid search engine indexing Global error logging for unhandled exceptions Error pages and logging in ASP.NET MVC 5 There are many ways of implementing error handling in ASP.NET MVC 5. Usually you will find aspnet mvc 4 solutions which involve at least one or a combination of these methods: HandleErrorAttribute Controller.OnException Method Application_Error event customErrors element in web.config httpErrors element in web.config Custom HttpModule All these methods have a historical reason and a justifyable use case. There is no golden solution which works for every application. It is good to know the differences in order to better understand which one is applied best. Before going through each method in more detail I would like to explain some basic fundamentals which will hopefully help in understanding the topic a lot easier. ASP.NET MVC Fundamentals The MVC framework is only a HttpHandler plugged into the ASP.NET pipeline. The easiest way to illustrate this is by opening the Global.asax.cs: public class MvcApplication : System.Web.HttpApplication Navigating to the implementation of HttpApplication will reveal the underlying IHttpHandler and IHttpAsyncHandler interfaces: public class HttpApplication : IComponent, IDisposable, IHttpAsyncHandler, IHttpHandler ASP.NET itself is a larger framework to process incoming requests. Even though it could handle incoming requests from different sources, it is almost exclusively used with IIS. It can be extended with HttpModules and HttpHandlers. HttpModules are plugged into the pipeline to process
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Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community aspnet mvc 3 of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up ASP.NET MVC 5 error handling up vote 13 down vote favorite 4 We want to handle https://dusted.codes/demystifying-aspnet-mvc-5-error-pages-and-error-logging 403 errors, 404 errors, all errors due to a MySpecialDomainException and provide a default error page for all other errors (including errors in the IIS configuration!). All errors should return proper Razor views, it would be very nice to have an ErrorController in front of the views. E.g. something like this: public class ErrorController : Controller { public ViewResult NotFound () { return View(); } public ViewResult Forbidden () { return View(); http://stackoverflow.com/questions/21993758/asp-net-mvc-5-error-handling } public ViewResult Default () { var ex = ObtainExceptionFromSomewhere(); if(ex is MySpecialDomainException) return View("MySpecialDomainException", new ErrorModel { Exception = ex }); return View("GeneralError", new ErrorModel { Exception = ex }); } } Currently you find many different ways to do that on the www, some most probably outdated. Among those: Controller.OnException() Error filter customErrors element in web.config Handling in Global.asax's Application_Error Q1: What is the recommended way to fulfill our requirements with ASP.NET MVC 5? Also we want to catch errors occurring in the IIS host. Q2: To prevent that IIS has to handle any 404s we thought about adding a default route matching all possible URLs - is this recommendable? Better to register instead for IIS' 404s as well? Q3: Is it even possible to register an IIS error page which goes back to a controller, or is IIS capable of ASPX / static HTML only? c# asp.net-mvc error-handling asp.net-mvc-5 asp.net-mvc-5.1 share|improve this question edited Jul 26 at 6:09 Mukesh Ram 2,7373625 asked Feb 24 '14 at 16:46 D.R. 6,17272272 I'm curious.. How exactly would you propose to have Razor pages when IIS is not configured correctly? If IIS isn't working, Razor won't be working... –Erik Funkenbusch Feb 24 '14 at 16:51 Yeah, probably it is
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 handle exceptions. Error handling isn't intrinsically exciting, but there are many ways of avoiding the classic https://www.simple-talk.com/dotnet/asp-net/handling-errors-effectively-in-asp-net-mvc/ yellow page of death, even getting ELMAH to manage error handling for you. 79 3 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 http://www.milevis.com/Tips/Details/45 ASP.NET Web Forms couldn't. Web Forms 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 aspnet mvc Web Forms allow you to map an error page for each possible HTTP status code. You control the mapping through the
our site. It's not fair to return HTTP status code 200 on error, even if at the same time we return a view, explaining that an error occurred. if the user types in an incorrect address (the most frequent user fault), we should return HTTP status code 404 and not return or redirect to a View, where status code 200 will be returned. Here we come to the MVC global error handling basic rules considering custom errors settings in Web.config and global error filters in Global.asax.cs: 1. Have HandleErrorAttribute registered in your Global.asax.cs. public static void RegisterGlobalFilters(GlobalFilterCollection filters) { filters.Add(new HandleErrorAttribute()); } In fact, it is there by default, called in Application_Start(). Don't remove it. Otherwise the framework will display it's fallback message "Server Error in '/' Application...". By default above filter captures HTTP errors 500 and displays the /Views/Shared/Error.cshtml view, but you can customize it setting the View property like filters.Add(new HandleErrorAttribute()){View="AnotherView"}. 2. Have the customErrors settings in Web.config.