Tools for troubleshooting and logging in C#.NET

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Tools for troubleshooting and logging
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Logging features in SharePoint Error and exception handling Debugging The Developer Dashboard Troubleshooting tools
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In all projects, you ll eventually have to perform some sort of troubleshooting. Depending on your support personnel s troubleshooting skills and how the application is built, problems can be fixed before your users even notice them. Normally, a problem starts when a user receives an error and can t resolve it. The user then reports the error and the problem escalates to your support team. If the error can t be resolved by the support team, the troubleshooting will fall back on your developers or application management team. Without proper information from your support team, you ll have a hard time reproducing the incident. Building Web Parts that correctly handle errors and unexpected situations allows you to more
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Tools for troubleshooting and logging
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quickly resolve any issues hopefully the support team will even be able to resolve it before it ends up on your desk. In large-scale scenarios with possibly hundreds of thousands of users, it can be difficult to track down a single problem by searching the log files of the application. SharePoint has solved this issue by using a unique id for each request. When an error occurs, SharePoint presents that id to the user, who can then send it to the support team using, for example, a screen dump. By giving your Web Parts the ability to be monitored and using the SharePoint logging facilities, you can cut down the time needed to find the source of problems. Once you ve figured out where and how the error happened, you have to reproduce this error to devise a resolution. You need different tools, depending on the type of error. If the error is in the code, you might have to reproduce the error in your development environment and eventually debug the code. Visual Studio 2010 is your primary development environment, and you can use it to step through each line of code until you isolate the problem. Sometimes you need to debug your application in an environment where you don t have access to Visual Studio. For that purpose, SharePoint 2010 has a new feature called the Developer Dashboard, which shows detailed information about all exceptions and warnings on the current page. The dashboard can also be used to inspect the performance of each Web Part and its methods in a page which is great when you need to optimize the application. To avoid unnecessary support calls, it s crucial to build robust code that handles exceptions and helps users avoid unhandled errors. Well written and robust are valid criteria for all kinds of development, but a single Web Part can make a page or whole site fail if it doesn t handle exceptions correctly. Visual Studio isn t the only tool you ll need when troubleshooting SharePoint and Web Parts. For specific scenarios, it may be important to have a JavaScript debugger if you don t have access to Visual Studio. And you may need to inspect what has been transferred between the client and server by using web proxy tools.
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Logging and error handling in SharePoint 2010
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SharePoint 2010 contains numerous features to enable you to troubleshoot your applications while developing or running in production. All requests to SharePoint are given a unique id, which can be used to trace a specific error message to a request. This number is called the correlation id. Depending on how you ve configured SharePoint errors, warnings and information messages are logged to the SharePointspecific trace logs and databases, or to the Windows Event Log. All of these log entries contain a correlation id, which allows you to combine logs from different sources to get a bigger picture of a specific error or warning. The correlation id is new in SharePoint 2010. This unique value is shown on the default error page. The default error page never shows the exact error that the end users saw, but users can send the correlation id to the support team for further investigation. Any custom logging to the log files will also contain this specific id.
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