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A customer recently asked how to implement a simple "grouped ListBox" experience in Silverlight (now available in desktop, mobile, and extra crispy flavor!), so I dashed off this sample to show one way that's pretty easy to work with.

 In Silverlight 3 you have access to PagedCollectionView (add a reference to System.Windows.Data to get it).  This is a view that enables you to add sort and group descriptors.  In my initial loading code I instantiate a new PagedCollectionView passing in my List<Person> as the enumerable type. 

Karl Shifflett is ready with the next sample in the WPF Sample Applications Series. This sample is the result of the question “how can I do multi-level grouping?” and provides a brief description of the problem, the solution and full source code.

WPF provides the CollectionViewSource for codeless sorting and grouping of data.  The SortDescriptions and GroupDescriptions collections can be modified at runtime if desired.  The SortDescription provides the ability to set the sort direction as I’ve done for the Sales.

While using the DataGrid in Silverlight 2, a common requirement was to group similar records (For e.g. group all records of particular city together). We got a similar mail from one of our visitors Rachida, who wanted to know how to group data in the Silverlight DataGrid. Well in Silverlight 3 DataGrid, this feature has been added and now we can group records with ease.

What is a Pivot table/grid? According to Wikipedia it is a data summarization tool found in spreadsheet applications. Still when I was a child I learned that people understand the best when they see an example.

Consider you have a table that contains the nutrition of given food, say a pizza:

In the data above you see that every nutrition is contained in a specific Group - 3 groups and 21 nutrition in total.