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。为什么会这样？我怎样才能改变这种行为？

Answer 1

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

更改为：

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

wpf datagrid：DataGridCheckBoxColumn事件

1 个答案: