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Validating Data in Silverlight 4 Applications – IDataErrorInfo

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0 comments   /   posted by Silverlight Show on Aug 16, 2010
Tags:   validation , silverlight-4 , dan-wahlin
In this post, Dan Wahlin will walk you through the process of using the IDataErrorInfo interface to validate data in Silverlight 4 apps.

Data validation is an important part of any application. If you've written code to validate data in Silverlight applications prior to the release of Silverlight 4, you've probably discovered that there isn't a great way to ensure that data is entered correctly and errors displayed properly by controls. The typical technique used for validating data was to throw exceptions within property setter blocks as data was found to be invalid. Controls bound to a property could be notified of a data validation exception by setting ValidatesOnExceptions to true in the data binding. Although this technique certainly works, there are some new options available in Silverlight 4 that can be used without resorting to throwing exceptions.


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