DataGrid for WPF and Silverlight includes several options for filtering the grid. You can add column filtering, a filter row, or full-text grid filtering. There's basic filtering or you can use the C1.WPF.DataGrid.Filters.dll assembly which offers more advanced filtering options than are built into the grid. How you choose to filter the grid will depends on your needs – for example if you just want the end user to be able to filter text in a column or if your application requires more advanced custom filtering.