wpf datagrid:DataGridCheckBoxColumn事件

Question

在我的WPF项目中,我使用复选框列构建了以下数据网格:

XAML

<DataGrid AutoGenerateColumns="False"  TargetUpdated="IsIntermediatePointFixedByBracketDataGrid_TargetUpdated">
        <DataGrid.Columns>               
            <DataGridCheckBoxColumn Binding="{Binding isFixedByBracket, NotifyOnTargetUpdated=True }" />
        </DataGrid.Columns>
</DataGrid>

C#

private void IsIntermediatePointFixedByBracketDataGrid_TargetUpdated(object sender, DataTransferEventArgs e)
{
    DataGrid dg = (DataGrid)sender;
    if (dg.SelectedIndex != -1 
        && ((IsFixedByBracketElement)dg.SelectedItem).isFixedByBracket != this.currentIntermediatePosition.isFixedByBracket[dg.SelectedIndex])
    {
        this.currentIntermediatePosition.isFixedByBracket[dg.SelectedIndex] = 
                    ((IsFixedByBracketElement)dg.SelectedItem).isFixedByBracket;
    }
}

当我选中/取消选中一个复选框时,会抛出TargetUpdated事件,但只有在我选择并取消选中包含该复选框的单元格时,该值才会更改.为什么会发生这种情况？我该如何改变这种行为？

Answer 1

原因是因为CellTemplates内部绑定的默认行为是UpdateSourceTrigger = LostFocus

改成 :

      <DataGridCheckBoxColumn Binding="{Binding isFixedByBracket, NotifyOnTargetUpdated=True , UpdateSourceTrigger=PropertyChanged }" />