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,将引发TargetUpdated事件,但是仅当我选择并取消选择包含该复选框的单元格时,该值才会更改。
为什么会发生这种情况?我该如何改变这种行为?

最佳答案

原因是因为CellTemplate内绑定的默认行为是UpdateSourceTrigger = LostFocus
改成 :

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

09-30 21:20