Asp.net Display Error Message On Custom Error Page
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.NET Development Office development Online Services Open Specifications patterns & practices Servers and Enterprise Development Speech Technologies Web Development Windows Desktop App Development TOC Collapse the table of content Expand the table of content https://www.asp.net/hosting/tutorials/displaying-a-custom-error-page-cs This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Complete Example for Error Handlers Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 This code example includes elements for both page-level and application-level exception handling. Code Example Files The example consists of the following files: Web.config Global.asax Default.aspx ExceptionUtility (to be put in the App_Code folder) GenericErrorPage.aspx https://msdn.microsoft.com/en-us/library/bb397417.aspx HttpErrorPage.aspx Http404ErrorPage.aspx DefaultRedirectErrorPage.aspx Web.config The following example shows the Web.config file. The customErrors section specifies how to handle errors that occur with file types that are mapped to ASP.NET, such as .aspx, .asmx, and .ashx files. (In IIS 6.0 and in IIS 7.0 in classic mode, static content files such as .html and .jpg files are not mapped to ASP.NET.) The settings in the example customErrors section cause any unhandled HTTP 404 (file not found) errors to be directed to the Http404ErrorPage.aspx file. These HTTP 404 errors would occur if a request were made for an .aspx file, .asmx file, and so on and if the requested file did not exist. All other unhandled errors in ASP.NET files are directed to the DefaultRedirectErrorPage.aspx file. If static content files are not handled by ASP.NET, a request for a nonexistent .html or .jpg file does not cause a redirect to the Http404ErrorPage.aspx file. If you want ASP.NET to handle requests for all file types, you can configure IIS to map file-name extensions to ASP.NET. Note In the example, the mode attribute is set to "On" so that you can error messages when you run the example in Visual Studio. In a production environmen
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 http://benfoster.io/blog/aspnet-mvc-custom-error-pages 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, http://www.sherweb.com/blog/how-to-create-custom-error-pages-in-iis-7-5-with-asp-net/ 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.Home > Tech Hub > How To Set Up Custom Error Pages In IIS 7.5 With ASP.NET How To Set Up Custom Error Pages In IIS 7.5 With ASP.NET by Jamie Furr on June 21, 2012 This blog post will explain how to configure custom error pages in IIS (Internet Information Server). For this example we will be using IIS 7.5 which shipped with Windows Server 2008 R2. If we configure .NET Error Pages at the site level, ASP.NET stores the settings in the site's web.config file. Since these settings are stored in the web.config file they are portable and can be easily moved to another server with the site's content. How to setup Custom Error Pages in IIS 7.5 Open Internet Information Services (IIS) Manager. Select your website. Note: This could also be set at the server level and applied to all sites on the server. DoubleClick on the ".NET Error Pages" icon. The .NET Error Pages features view will be displayed. Click the "Edit Feature Settings" link to enable this feature. The "Edit Error Page Settings" dialog box will appear. In order to change the default mode, we must also specify a "Default Page". This page will be used for all status codes that are not otherwise defined. In our example we are using a generic custom error page to trap all other errors. Once you enter the absolute URL for the default error page click OK. Note: It may be a good idea to use a static HTML page here just in case ASP.NET is not functioning properly. By default server errors are shown when logged on locally to the IIS server and custom errors will only be used from remote sessions. We will want to change this to "On" if we are logged on locally to the IIS server. Otherwise, it will display detailed server errors, and not our custom error pages. Next we will explicitly define the 404 Error code. To get the browser to throw a 404 error, we pointed it to a file on the test site that does not exist. As you can see in the following image the friendly HTTP 404 error page was shown in IE9. A friendly HTTP 404 Error in IE9: On the .NET Error Pages Actions menu click the Add link. The "Add Custom Error Page" dialog will appear. This is where we define individual error pages per status code. For our example we will add a custom page for the HTTP 404 Error. Now that we have turned on the feature and added a custom page for the 404 status code we can v