WPF DataGrid添加编号列

WPF DataGrid添加编号列？

第一步：
<DataGridTemplateColumn Header="编号" Width="50" MinWidth="10" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGridRow}}, Path=Header}" 
HorizontalAlignment="Left" VerticalAlignment="Center" Margin="5,0,0,0"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate> 
</DataGridTemplateColumn>

第二步：添加DateGrid LoadingRow 事件，如下所示：
private void dgvList_LoadingRow(object sender, DataGridRowEventArgs e)
{
　　e.Row.Header = e.Row.GetIndex() + 1;
}