c# - WPF 数据网格 : DataGridCheckBoxColumn events

Question

在我的 WPF 项目中，我构建了以下带有复选框列的 datagrid:

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，将引发 TargetUpdated 事件，但只有当我选择和取消选择包含该复选框的单元格时，该值才会更改。为什么会这样？我怎样才能改变这种行为？

Answer 1

这是因为 CellTemplates 中绑定(bind)的默认行为是 UpdateSourceTrigger=LostFocus。

更改为:

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