<Window x:Class="WpfApplication5.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    Title="Window1" Height="300" Width="640">
    <Window.Resources>
        <Style x:Key="ItemContStyle" TargetType="{x:Type telerik:GridViewRow}">
            <Style.Resources>
                <LinearGradientBrush x:Key="Brush1" StartPoint="0.5,0" EndPoint="0.5,1">
                    <GradientStop Offset="0.1" Color="#AA00CC00" />
                    <GradientStop Offset="0.8" Color="#55008800" />
                </LinearGradientBrush>

                <LinearGradientBrush x:Key="Brush2" StartPoint="0.5,0" EndPoint="0.5,1">
                    <GradientStop Offset="0.1" Color="Orange" />
                    <GradientStop Offset="0.8" Color="OrangeRed" />
                </LinearGradientBrush>

            </Style.Resources>


            <Style.Triggers>

                <DataTrigger Binding="{Binding Path=Category}" Value="1">
                    <Setter Property="Background" Value="{StaticResource Brush1}" />
                    <Setter Property="Height" Value="25"/>
                </DataTrigger>

                <DataTrigger Binding="{Binding Path=Category}" Value="2">
                    <Setter Property="Background" Value="{StaticResource Brush2}" />
                    <Setter Property="Height" Value="30"/>
                </DataTrigger>


            </Style.Triggers>
        </Style>

    </Window.Resources>
    <Grid>
        <telerik:RadGridView Background="Transparent" x:Name="ExampleGrid" CanUserSortColumns="False" IsFilteringAllowed="False" AutoGenerateColumns="False"
                             RowIndicatorVisibility="Collapsed" ShowGroupPanel="False" GridLinesVisibility="Horizontal" Width="622"  ItemsSource="{Binding}" RowStyle="{StaticResource ItemContStyle}">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn Header="Artist" DataMemberBinding="{Binding Path=Artist}" Width="310" />
                <telerik:GridViewDataColumn Header="Title" DataMemberBinding="{Binding Path=Title}" Width="310" />
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>
