Dot Net Error Handling Example
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Exception Handling In Dot Net
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has been removed. You’ll be auto redirected in 1 second. Application Essentials Exceptions Exception resttemplate error handling example Handling Fundamentals Exception Handling Fundamentals How to: Use the Try/Catch Block to Catch Exceptions How to: Use the Try/Catch Block to Catch
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Exceptions How to: Use the Try/Catch Block to Catch Exceptions How to: Use the Try/Catch Block to Catch Exceptions How to: Use Specific Exceptions in a Catch Block How to: Explicitly Throw Exceptions How to: Create https://www.asp.net/web-forms/overview/getting-started/getting-started-with-aspnet-45-web-forms/aspnet-error-handling User-Defined Exceptions Using User-Filtered Exception Handlers How to: Use Finally Blocks 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: Use the Try/Catch Block to Catch 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 https://msdn.microsoft.com/en-us/library/xtd0s8kd(v=vs.110).aspx 1.1 Place the sections of code that might throw exceptions in a try block and place code that handles exceptions in a catch block. The catch block is a series of statements beginning with the keyword catch, followed by an exception type and an action to be taken.Note Almost any line of code can cause an exception, particularly exceptions that are thrown by the common language runtime itself, such as OutOfMemoryException and StackOverflowException. Most applications do not have to deal with these exceptions, but you should be aware of this possibility when writing libraries to be used by others. For suggestions on when to set code in a try block, see Best Practices for Handling Exceptions.The following code example uses a try/catch block to catch a possible exception. The Main method contains a try block with a StreamReader statement that opens a data file called data.txt and writes a string from the file. Following the try block is a catch block that catches any exception that results from the try block.Example C#C++VB Copy using System; using System.IO; public class ProcessFile { public static void Main() { try { StreamReader sr = File.OpenText("data.txt"); Console.WriteLine("The first line of this file is {0}", sr.ReadLine()); sr.Close(); } catch (Exception e) { Console.WriteLine("An error occurred: '{0}'", e); } } } This
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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 Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow 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 How using try catch for exception handling is best practice up vote 112 down vote favorite 80 while maintaining my colleague's code from even someone who claims to be a senior developer, I often see the following code: try { //do something } catch { //Do nothing } or sometimes they write logging information to log files like following try catch block try { //do some work } catch(Exception exception) { WriteException2LogFile(exception); } I am just wondering if what they have done is the best practice? It makes me confused because in my thinking users should know what happens with the system. Please give me some advice. c# .net exception exception-handling try-catch share|improve this question edited Feb 20 '13 at 6:45 user1645055 asked Feb 20 '13 at 6:32 Toan Nguyen 5,59731841 87 Snippet #1 is 99.999% of the time unacceptable. –leppie Feb 20 '13 at 6:33 14 Displaying exception directly to user is never a good idea mainly for two reasons: 1. if it's usual user (s)he will be annoyed reading error message that tells very few for him/her. 2. if (s)he's, so called, hacker (s)he may get useful information. The best practice, IMO, is to log exception and show friendly error message. –Leri Feb 20 '13 at 6:35 3 @leppie If something unexpected occurs (like NullReference or ArgumentNull that is not part of application flow) it means that there's a bug that needs to be fixed so logging them will help to debug your code much faster. –Leri Feb 20 '13 at 6:42 9 Using a try-catch block to hide an exception is generally the result of lazy programming. It's a shortcut that is often used instead of writing validation code to test inputs. Very occasionally there are times when an exception may arise that doesn't aff