Style TargetType=xType DataGrid Setter Property=AlternatingRowBackground Value=#D3D3D3 StyleTriggers Trigger Property=ItemsControlAlternationIndex

To use your specified DataGrid style instead of a global one, you can add the style to the DataGrid explicitly by setting the Style property to the name of the style in XAML. For example:

<DataGrid Style="{StaticResource YourDataGridStyle}" .../>

Make sure to replace "YourDataGridStyle" with the actual name of your style resource. This will override any global style for the DataGrid and apply your custom style.