Web
Since our RadGrid for ASP.NET AJAX filter row is very popular, I’ve made small demo how to achieve the same in RadGridView for Silverlight: To turn on this for your grid you can simply set GridViewFilterRow.IsEnabled attached property: <UserControl x:Class="CustomFilterRow.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:telerikGridViewFilter="clr-namespace:Telerik.Windows.Controls.GridView.Filter" xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView">
<Grid x:Name="LayoutRoot" Background="White">
<telerik:RadGridView x:Name="RadGridView1" AutoGenerateColumns="False"
telerikGridViewFilter:GridViewFilterRow.IsEnabled="True">
<telerik:RadGridView.Columns>
...