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You can filter and sort data by simply modifying the selection routine. With emerging technologies like LINQ, the way we think about filtering and sorting has dramatically changed. Now that we’re accustomed to manipulating data using query expressions in LINQ, the EntityDataSource and LinqDataSource controls can come to the rescue in many scenarios.
ASP.NET 4.0 introduces a new kind of control, called QueryExtender, which unifies and simplifies both data filtering and sorting.