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我有一个WPF的DataGrid以下XAML标记：防止多行选择
<DataGrid ItemsSource="{Binding ResultList}" Grid.ColumnSpan="4" Grid.Row="7" Height="150"
HorizontalAlignment="Left" Margin="10,0,0,0" Name="gvResults"
VerticalAlignment="Bottom" Width="590" AutoGenerateColumns="False" SelectionChanged="gvResults_SelectionChanged"
SelectionUnit="FullRow">
<DataGrid.Columns>
<DataGridTextColumn IsReadOnly="True" Binding="{Binding Name}" Header="Name" ScrollViewer.VerticalScrollBarVisibility="Auto" Width="190" />
<DataGridTextColumn IsReadOnly="True" Binding="{Binding Surname}" Header="Surname" Width="190" />
<DataGridTextColumn IsReadOnly="True" Binding="{Binding Age}" Header="Age" Width="*" />
</DataGrid.Columns>
</DataGrid>
是否有可能阻止用户选择多行同时按住按Ctrl键或选择多行用鼠标？
我试过在SelectionChanged事件下面的代码，但它不工作：
private void gvResults_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (gvResults.SelectedItems.Count > 1)
{
e.Handled = true;
}
}