Error Handler Class C#
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C# Error Handling Class
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C# Global Error Handler
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 A global error handler for a class library in c# error handling best practices C# up vote 3 down vote favorite Is there a way to catch and handle an exception for all exceptions thrown within any of the methods of a class library? I can use a try catch construct within each method as in sample code below, but I was looking for a global error handler for a class library. The library could be used by ASP.Net or Winforms apps c# error handling techniques or another class library. The benefit would be easier development, and no need to repeatedly do the same thing within each method. public void RegisterEmployee(int employeeId) { try { .... } catch(Exception ex) { ABC.Logger.Log(ex); throw; } } c# error-handling class-library share|improve this question asked Jul 26 '13 at 3:53 Sunil 5,362124894 You can use ContextBoundObject –Mad Hollander Jul 26 '13 at 4:04 Can you share some sample code, but only if you have it? Thanks –Sunil Jul 26 '13 at 4:08 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted You can subscribe to global event handler like AppDomain.UnhandledException and check the method that throws exception: AppDomain.CurrentDomain.UnhandledException += CurrentDomainOnUnhandledException; private static void CurrentDomainOnUnhandledException(object sender, UnhandledExceptionEventArgs unhandledExceptionEventArgs) { var exceptionObject = unhandledExceptionEventArgs.ExceptionObject as Exception; if (exceptionObject == null) return; var assembly = exceptionObject.TargetSite.DeclaringType.Assembly; if (assembly == //your code) { //Do something } } share|improve this answer answered Jul 26 '13 at 4:21 Vyacheslav Volkov 2,7151714 Just curious. Would this involve reflection when getting exceptionObject.TargetSite.DeclaringType.Assembly? –Sunil Jul 26 '13 at 6:07 The TargetSite property returns the method of MethodBase type that throws the current exception. The MethodBase t
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Error Handling In C#
APIs and reference Dev centers Retired content Samples We’re sorry. The c# exception types content you requested has been removed. You’ll be auto redirected in 1 second. Development Guide Application Essentials Exceptions
C# Exception Class
Exceptions Best Practices for Exceptions Best Practices for Exceptions Best Practices for Exceptions Exception Class and Properties Exception Hierarchy Exception Handling Fundamentals Best Practices for Exceptions Handling COM Interop http://stackoverflow.com/questions/17872620/a-global-error-handler-for-a-class-library-in-c-sharp Exceptions 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. Best Practices for Exceptions .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 4 Silverlight .NET Framework 3.5 .NET Framework 3.0 .NET Framework 2.0 .NET Framework 1.1 https://msdn.microsoft.com/en-us/library/seyhszts(v=vs.110).aspx A well-designed app handles exceptions and errors to prevent app crashes. This article describes best practices for handling and creating exceptions.Handling exceptionsThe following list contains some general guidelines for handling exceptions in your app.Use exception handling code (try/catch blocks) appropriately. You can also programmatically check for a condition that is likely to occur without using exception handling. Programmatic checks. The following example uses an if statement to check whether a connection is closed. If it isn't, the example closes the connection instead of throwing an exception. C#C++VB Copy if (conn.State != ConnectionState.Closed) { conn.Close(); } Exception handling. The following example uses a try/catch block to check the connection and to throw an exception if the connection is not closed. C#C++VB Copy try { conn.Close(); } catch (InvalidOperationException ex) { Console.WriteLine(ex.GetType().FullName); Console.WriteLine(ex.Message); } The method you choose depends on how often you expect the event to occur. Use exception handling if the event doesn't occur very often, that is, if the event is truly exceptional and indicates an error (such as an unexpected end-of-file). Wh
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 https://msdn.microsoft.com/en-us/library/dd632196.aspx content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. Distributed Connectivity Services Building and Consuming DCS Services Introduction to the DCS Software Factory Introduction http://programmers.stackexchange.com/questions/96383/is-onerror-handler-better-than-exceptions to the DCS Software Factory Defining Exception and Error Classes Defining Exception and Error Classes Defining Exception and Error Classes Using the DCS Software Factory to Create Services Defining Request and Response error handling Messages Defining Exception and Error Classes Activities for Building DCS Business Workflows Importing and Exporting Projects Adding the DCS Configuration Schema to Visual Studio 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. Defining Exception and Error Classes The DCS Software Factory can generate exception c# error handling and error classes that let you implement strongly typed error handling in your services and client applications. You use the Add Error and Exception Classes recipe in the Messages project to define Exception and Error classes. For more information about creating a Messages project, see Defining Exception and Error Classes. Note: You can use the default exception and error message classes generated automatically by the DCS Software Factory if you do not create a Messages project and your operations do not need to customize the exceptions and errors that they can throw. To add exception and error classes to a messages project Right-click the message project, and then click Add Error and Exception Classes. In the Add Error and Exception Classes dialog box, type names for the exception and error classes, and then click Finish. Note: When you create error and exception messages, it is common practice to add an Error or Exception suffix to the class names.. In Solution Explorer, double-click the source code file for the error and exception classes to display them in the Code and Text editor. Add properties and methods that define the data and functionality of the erro
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 more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Programmers Questions Tags Users Badges Unanswered Ask Question _ Programmers Stack Exchange is a question and answer site for professional programmers interested in conceptual questions about software development. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Is onError handler better than exceptions? up vote 6 down vote favorite I understand that exception in program means that something unpredictable happened (but not so bad to unavoidably crash the application!). The try-catch-finally sequence makes me sad because the program is harder to read (one more level of curly brackets) and harder to understand (jump from anywhere to catch in case of exception happened, it is deprecated GOTO). Since we have OOP, I suggest to create proxy class which in case of exception consumes it silently, returns some default value and fires onError event. So if we propagate exception, we have onError call instead, and the two disadvantages mentioned above are solved. See the example in C#: Standard exception attitude class Computer { // let's say we need to propagate exception and decide what to do lately public int divide(int a, int b) { int result = a / b; return result; } } class Program { public static void Main() { Computer c = new Computer(); try { Console.WriteLine(c.divide(1, 0)); } catch(ArithmeticException e) { // we are teleported here from the middle of Computer.divide method! // do something } } } // three levels of brackets (without namespace) in such trivial example?? onError handler attitude class ProxyComputer { private Computer c = new Computer(); // it is not virtual, can not be overriden public int divide(int a, int b) { // alas, exceptions are standard, but we can stop them in this class try { return c.divide(a, b); } catch(ArithmeticException e) { this.onError(e); } } protected virtual void onError(Exception e) { // do nothing } } class MoreStrictComputer : ProxyComputer { protected override void onError(Exception e) { // mail to IT department, revert all transactions etc. Console.WriteLine("I can't seem to do that"); } } class Program { public static void Main() { ProxyComputer pc = new ProxyComputer(); MoreStrictComputer msc = new MoreStrictComputer(); // fires onError instead of exception Console.WriteLine(pc.divide(1, 0));