Error Handling Asp.net Global.asax
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. MSDN Library MSDN Library MSDN Library MSDN Library Design Tools Development Tools and Languages Mobile and Embedded Development .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 This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. How to: Handle Application-Level Errors Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 .NET Framework 3.0 Visual Studio 2005 This code example shows how to create an error handler in the Global.asax file that will catch all unhandled ASP.NET errors while processing a request — in other words, all the errors that are not caught with a Try/Catch block or in a page-level error handler. In the example, the handler transfers control to a generic error page named GenericErrorPage.aspx, which interprets the error and displays an appropriate message. Example The following example is from a complete code sample in Complete Example for Error Handlers. Security Note Never set customErrors to Off in your Web.config file if you do not have an Application_Error handler in your Global.asax file. Potentially compromising information about your Web site can be exposed to anyone who can cause an error to occur on your site. C#VB Copy void Application_Error(object sender, EventArgs e) { // Code that runs when an unhandled error occurs // Get the exception object. Exception exc = Server.GetLastError(); // Handle HTTP errors if (exc.GetType() == typeof(HttpException)) { // The Complete Error Handling Example generates // some errors using URLs with "NoCatch" in them; // ignore these here to simulate what would happen // if a global.asax handler were not implemented. if (exc.Message.Contains("NoCatch")
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 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 Payment with PayPal8. Membership and Administration9. URL Routing10. https://msdn.microsoft.com/en-us/library/24395wz3.aspx 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 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 https://www.asp.net/web-forms/overview/older-versions-getting-started/deploying-web-site-projects/processing-unhandled-exceptions-cs 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 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 Gettin
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn http://stackoverflow.com/questions/28768715/application-error-in-global-asax-not-catching-errors-in-webapi more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow http://odetocode.com/articles/69.aspx Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Application_Error in global.asax not catching errors in WebAPI up error handling vote 6 down vote favorite 1 For a project I am working on, one of the things we're implementing is something that we have code for in some of my teams older ASP.NET and MVC projects - an Application_Error exception catcher that dispatches an email to the development team with the exception experience and most relevant details. Here's how it looks: Global.asax: protected void Application_Error(object sender, EventArgs e) error handling asp.net { Exception ex = Server.GetLastError(); string path = "N/A"; if (sender is HttpApplication) path = ((HttpApplication) sender).Request.Url.PathAndQuery; string args = string.Format("Path: {0}", path); // Custom code that generates an HTML-formatted exception dump string message = Email.GenerateExceptionMessage(ex, args); // Custom code that sends an email to the dev team. Email.SendUnexpectedErrorMessage("Some App", message); } One "minor" problem, though - when I intentionally have a part of the code throw an exception in order to test this mechanism... public static void GetMuffinsByTopping(string topping) { throw new Exception("Test Exception!", new Exception("Test Inner Exception!!!")); // Actual repository code is unreachable while this test code is there } The front-end JavaScript is immediately intercepting an HTTP 500 request, but the global.asax.cs code noted above is not being reached (I set a breakpoint on the first executing line of the method.) Question: In what way can I get the "old" Application_Error handler to dispatch error emails, so that our team's developers can more easily debug our application? c# asp.net-web-api error-reporting share|improve this question asked Feb 27 '15 at 15:34 Andrew Gray 1,3701630 1 You could abstract your error handling logic into a separate method that Application_Error calls, wrap the Web API method body in a try/catch, th
This article demonstrates a generic error handler in the global.asax which will be implemented for anyapplication error generated by the web application for whicha custom error handler has not been written. There are three parts to this error handling routine1.It writes the error message to the event log2.It sends the development team an email with the error details3.It has a ‘pretty’ message on the web page, letting the user know that an error occurred and that the development team has been notified. We are going to use the Application_Error event of the global.asax file. The HttpApplication class in the System.Web namespace implements this Error event handler, so make sure to add a reference to this namespace. We also need to add a reference to the System.Diagnosistics namespace --- protected void Application_Error(Object sender, EventArgs e) { // declare an exeception object and get the original exception Exception exception = Server.GetLastError().GetBaseException(); // now we are going to be nice to ourselves and format that stack trace. // It would be easy tojust do a string stackTrace = exception.StackTrace, but after// you’ve tried to read a fewof these spending time formatting it – is time well spent string stackEntryDelimiter = " at "; string topStackEntry = String.Empty; string stackTrace = exception.StackTrace; try { int nextStackEntry = stackTrace.IndexOf(stackEntryDelimiter, stackEntryDelimiter.Length); if(nextStackEntry > 0) { topStackEntry = stackTrace.Substring(0, nextStackEntry); } else { topStackEntry = stackTrace; } } catch(Exception ex) { // if for whatever reason our error handler decides to generate an error – well we just eat it Debug.Write(ex.Message); } try {string eventLogFormat = "Error in {0} User: {1} Error Message: {2} Line: {3}";string[] eventLogArgs = { Request.Url.ToString(), Context.User.Identity.Name, exception.Message, topStackEntry }; string eventLogMessage = String.Format(eventLogFormat, eventLogArgs); EventLog objLog = new EventLog(); objLog.Source = "appname"; // change this to the application name for which you’re trapping errors objLog.WriteEntry(eventLogMessage, EventLogE