Asp.net Mvc Custom Error Page Web.config
you're not alone. It's surprisingly difficult to do this correctly, not helped by the fact that some errors are handled by ASP.NET and others by IIS. Ideally (and I expect such is the case with some other frameworks/servers) we would just configure our custom error pages in one place and it would just work, no matter how/where the error was raised. Something like:
404 Page Not Found
I created a new ASP.NET MVC 5 application using the standard template in Visual Studio. If I run the site and try to navigate to a resource that does not exist e.g. /foo/bar, I'll get the standard ASP.NET 404 page with the following information: Server Error in '/' Application. The resource cannot be found. Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. Requested URL: /foo/bar Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.33440 Not exactly friendly, is it? In this case the error was raised by ASP.NET MVC because it could not find a matching controller and/or action that matched the specified URL. In order to set up a custom 404 error page add the following to web.config insideit 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 and HipChat, Visual Studio integration, API and much more. Custom error pages and global error logging are two elementary and yet very confusing topics in ASP.NET MVC 5. There are numerous ways of implementing error pages in ASP.NET MVC 5 and when you search for advice you will find a dozen different http://benfoster.io/blog/aspnet-mvc-custom-error-pages StackOverflow threads, each suggesting a different implementation. Overview What is the goal? 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 https://dusted.codes/demystifying-aspnet-mvc-5-error-pages-and-error-logging MVC 5 There are many ways of implementing error handling in ASP.NET MVC 5. Usually you will find 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
Websites Community Support ASP.NET Community Standup ForumsHelp Web Forms:Guidance Videos Samples Forum Books Open Source Older Versions - Getting Started Getting StartedGetting Started with ASP.NET 4.5 Web Forms https://www.asp.net/hosting/tutorials/displaying-a-custom-error-page-cs and Visual Studio 20131. Getting Started with Web Forms and Visual Studio2. Create the Project3. Create the Data Access Layer4. UI and Navigation5. Display Data Items and Details6. Shopping Cart7. Checkout and http://www.neptunecentury.com/blogs/asp-net/mvc5/mvc-5-how-to-show-custom-error-pages Payment with PayPal8. Membership and Administration9. URL Routing10. ASP.NET Error HandlingIntroduction to ASP.NET Web FormsCreating a Basic Web Forms Page in Visual Studio 2013Creating ASP.NET Web Projects in Visual Studio 2013Code Editing asp.net mvc ASP.NET Web Forms in Visual Studio 2013ASP.NET Scaffolding in Visual Studio 2013ASP.NET Web Forms (dotnetConf 2014)Using Page Inspector for Visual Studio 2012 in ASP.NET Web FormsVisual Studio 2012 Hands On LabsWhat's New in ASP.NET and Web Development in Visual Studio 2012What's New in Web Forms in ASP.NET 4.5Using Page Inspector in Visual Studio 2012Monitoring and TelemetryRoutingASP.NET 4 - RoutingASP.NET 4 - Defining RoutesASP.NET asp.net mvc custom 4 - Constructing URLs from RoutesASP.NET 4 - Accessing URL Parameters in a PageJavaScript and Client FrameworksASP.NET 4 - Microsoft Ajax OverviewASP.NET AJAX Control Toolkit (maintained by DevExpress)Working with Data Getting Started with ASP.NET 4.5 Web FormsModel Binding and Web Forms in Visual Studio 20131. Retrieving and Displaying Data2. Updating, Deleting, and Creating Data3. Sorting, Paging, and Filtering Data4. Integrating JQuery UI Datepicker5. Using Query String Values to Filter Data6. Adding Business Logic LayerASP.NET 4 Web Forms - Validating User Input in a PageASP.NET 4 Web Forms - State ManagementASP.NET Data Access - Recommended ResourcesServer Data ControlsASP.NET 4 Data-Bound ControlsASP.NET 4 Data Source Controls OverviewASP.NET 4.5 Chart ControlRecommended Resources for ASP.NET Data AccessSecurity, Authentication, and Authorization Getting Started with ASP.NET 4.5 Web FormsASP.NET IdentityCreate a secure ASP.NET Web Forms app with user registration, email confirmation and password reset (C#)Create an ASP.NET Web Forms app with SMS Two-Factor Authentication (C#)OWIN and KatanaPerformanceUsing Asynchronous Methods in ASP.NET 4.5[Build 2014] Deep Dive: Improving Performance in Your ASP.NET App (Levi Broderick)ASP.NET 4 - Web Forms Performance OverviewASP.NET 4 - Web Forms Caching OverviewASP.NET 4 - Caching Web Forms PagesASP.NET 4 - Caching Portions
Donate Log In ASP.NET MVC5 MVC 5 How To Show Custom Error Pages MVC 5 How To Show Custom Error Pages posted on 11/29/2014 8:13 AM by Eric Butler Tweet While working on Neptune Century's site redesign, I stumbled upon some issues trying to show custom error pages for 404 and 500 errors. The 500 error is relatively easy to deal with, but 404 was a bit trickier... that is until I realized how to do it with MVC and IIS 8+.The first thing I tried was the ye old customErrors section in System.Web. It did what is was supposed to do, that is redirect the user to a friendly 404 error page, but the problem with that approach was that the response code was set to a 302 redirect. That is not a very good solution for SEO optimization. We want the page/url we request to be delivered as a 404 response, not a redirect. Here is an example of what I mean:As you can see in the image above, the customErrors section causes a 302 redirect. The actual page Error/NotFound contains the 404. This is not what we want! First off, we want the url in the browser to stay the same, but in this case, it changes to Error/NotFound?aspxerrorPath=/Home/FooBar. Ewwwww.In order for us to get a proper status code returned to the browser, and keep our original URL, we need to add a section to the web.config. I also commented outthe customErrors section.When adding this section to your site, keep in mind that if you want to show custom errors while you are developing, you need to set errorMode="Custom". This will allow you to test your error page. Set it to DetailedLocalOnly when you want to see the detailed errors on your development machine.Now, in our ErrorController, we define our actions:Make sure to set the Respone.StatusCode to 404 or the browser will get a 200 (success).One other thing to note; when I added the above to my web.config. At first it didn't work. I had to add the existingResponse="Replace" attribute. This replaces the default 404 / 500 response with your custom content.So, what does it look like now?And a quick check of the developer tools (F12)Now you can see that our response code is 404 for the invalid url, and not a 302 redirect! Yay!Want to try this out yourself? Head over to the GitHub page and download or clone the repo. Then run the solution in Visual Studio 2013.Get This Demo As a thank-you, please consider sending a small donation. You can contribute as much as you'd like. Comments Log in to leave a comment Log In User says © 2016 - Neptune Century Social Facebook Twitte