datagrid Checkbox

<DataGrid VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Recycling"  Name="dataGrid1" AutoGenerateColumns="False" ItemsSource="{Binding}" HorizontalGridLinesBrush= "{DynamicResource GridLinesBrush}" VerticalGridLinesBrush="{DynamicResource GridLinesBrush}"  AlternatingRowBackground="{DynamicResource RowBackgroundBrush}" CanUserAddRows="False"  CanUserResizeRows="False" CanUserDeleteRows="False" IsEnabled="True" Margin="0" RowHeight="20"   CellStyle="{DynamicResource DataGridCellStyle2}" ColumnHeaderStyle="{DynamicResource DataGridColumnHeaderStyle1}"  RowStyle="{DynamicResource DataGridRowStyle1}" RowHeaderStyle="{DynamicResource DataGridRowHeaderStyle1}"  ItemsPanel="{DynamicResource ItemsPanelTemplate1}" RowHeaderWidth="0" IsSynchronizedWithCurrentItem="True"  SelectionMode="Single" MinWidth="10" BorderThickness="0" GridLinesVisibility="Horizontal" ColumnHeaderHeight="22"  ScrollViewer.CanContentScroll="False" >   <DataGrid.Columns>     <DataGridTemplateColumn Header="选择" CanUserReorder="False">       <DataGridTemplateColumn.CellTemplate>         <DataTemplate>           <CheckBox IsChecked="{Binding IsChecked, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Cursor="Hand"/>         </DataTemplate>         </DataGridTemplateColumn.CellTemplate>     </DataGridTemplateColumn>     <DataGridTextColumn Header="标题" Binding="{Binding Title, Mode=OneWay}" />   </DataGrid.Columns> </DataGrid>

　　IsChecked="{Binding IsChecked, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"