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 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. 

Silverlight 3 includes PagedCollectionView class, which provides UI-level grouping, sorting and paging functionality for any data source that implements the IEnumerable interface. This works as long as all the data that you need to sort, page are already fetched to the client which could be a slow process and can potentially consumed lots of memory on the client-side. A better solution is to provide Server-side sorting & paging. 

Silverlight 3 includes PagedCollectionView class, which provides grouping, sorting, and paging functionality for any data source that implements the IEnumerable interface. This works as long as all the data that you need to sort (and/or page) is already fetched to the client. However when you are retrieving only a limited set of data from the server at a time, you need an alternative solution that does sorting on the server.

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.

Introduction

In this previous article we added a DomainDataSource control in our application and bounded it to a DataGrid and with their help we easily visualized our data. Now we are going to implement some more goodies into the application - sorting and filtering. We achieve that via the DomainDataSource control, as it provides such functionality and is really simple to use.

Here are some links to the previous articles if you have missed them:

Creating applications with .NET RIA Services Part 1 - Introduction

Creating applications with .NET RIA Services Part 2 - Creating the project

Creating applications with .NET RIA Services Part 3 - Adding a DomainService class

Creating applications with .NET RIA Services Part 4 - Adding a DomainDataSource

Here is a link to the live demo at this stage and the source code. Note that they will be updated with each article! ;)