Question

我正在努力用DataGrid捕获一个事件。我想要实现的是当用户在datagrid单元格的复选框上单击ONCE时，会触发一个事件并且我可以获取当前单元格值。但是，CellChangedEvent仅在选择更改时触发，并且CellEditingEvent在单元格失去焦点时触发，或者从不触发。如果我通过执行以下操作尝试通过单击进行可修改的复选框，它永远不会触发：

<DataGrid Grid.ColumnSpan="2" Grid.Row="1" Grid.Column="0" AutoGenerateColumns="True" ItemsSource="{Binding MasterDataTable, Mode=TwoWay}" CanUserAddRows="False" Margin="10 5" CurrentCellChanged="DataGrid_CurrentCellChanged">
            <DataGrid.Resources>
                <Style TargetType="DataGridCell">
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="IsEditing" Value="True" />
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.Resources>
        </DataGrid>

如果用户点击单元格内的复选框，我该如何调用方法？提前谢谢。

Answer 1

1）在您的DataGrid注册表中 TargetUpdated 事件。

2）指定一个列，理想情况下设置 AutoGenerateColumns = False 。

3）在您的Binding标志中 NotifyOnTargetUpdated 属性（您的目标是您的复选框）。

4）在Binding UpdateSourceTrigger = PropertyChanged 和 Mode = TwoWay （不是DataGrid的默认行为）中。

XAML：

 <DataGrid TargetUpdated="DataGrid_TargetUpdated" 
           AutoGenerateColumns="False" 
           ItemsSource="{Binding SomeValues, Mode=OneWay}"  CanUserAddRows="False"  >
    <DataGrid.Columns>
        <DataGridCheckBoxColumn Binding="{Binding Path=.,  NotifyOnTargetUpdated=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" Width="*"/>                        
    </DataGrid.Columns>
</DataGrid>

CS中的

:(您可能无法处理该事件。）

   private void DataGrid_TargetUpdated(object sender, DataTransferEventArgs e)
   {
         // Do what ever...
   }

Answer 2

这就是我解决它的方式。这不是最好的解决方案，但它适用于我。如@eranotzap所述，我设置了AutoGenerateColumns = False和UpdateSourceTrigger = PropertyChanged。然后我做了以下事情：

<DataGrid Grid.ColumnSpan="2" Grid.Row="1" Grid.Column="0" 
          AutoGenerateColumns="False" 
          ItemsSource="{Binding MasterDataTable, Mode=TwoWay}" 
          CanUserAddRows="False" 
          Margin="10 5">
    <DataGrid.Columns>
        <DataGridTextColumn Binding="{Binding Path=Fornitore}" Header="Fornitore" Width="Auto" IsReadOnly="True" />
        <DataGridTextColumn Binding="{Binding Path=Stat}" Header="Stat" Width="Auto" IsReadOnly="True" />
        <DataGridTextColumn Binding="{Binding Path=Intestazione}" Header="Intestazione" Width="*" IsReadOnly="True" >
        <DataGridTextColumn.ElementStyle>
            <Style TargetType="TextBlock">
                <Setter Property="TextWrapping" Value="Wrap" />
            </Style>
        </DataGridTextColumn.ElementStyle>
        <DataGridTextColumn.EditingElementStyle>
            <Style TargetType="TextBox">
                <Setter Property="TextWrapping" Value="Wrap" />
                <Setter Property="AcceptsReturn" Value="true" />
            </Style>
        </DataGridTextColumn.EditingElementStyle>
        </DataGridTextColumn>
        <DataGridTextColumn Binding="{Binding Path=PrzVend}" Header="PrzVend" Width="Auto" IsReadOnly="True" />
        <DataGridTextColumn Binding="{Binding Path=DatEXPO}" Header="DatEXPO" Width="Auto" IsReadOnly="True" />
        <DataGridCheckBoxColumn Binding="{Binding Path=Sel, NotifyOnSourceUpdated=False, NotifyOnTargetUpdated=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" Header="Sel" Width="Auto">
            <DataGridCheckBoxColumn.CellStyle>
                <Style TargetType="DataGridCell">
                    <EventSetter Event="CheckBox.Checked" Handler="CellChanged"/>
                    <EventSetter Event="CheckBox.Unchecked" Handler="CellChanged"/>
                    <Style.Triggers>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsMouseOver" Value="True" />
                                <Condition Property="IsReadOnly" Value="False" />
                            </MultiTrigger.Conditions>
                            <Setter Property="IsEditing" Value="True" />
                        </MultiTrigger>
                    </Style.Triggers>
                </Style> 
            </DataGridCheckBoxColumn.CellStyle>
        </DataGridCheckBoxColumn>
        <DataGridTextColumn Binding="{Binding Path=CodComp}" Header="CodComp" Width="Auto" IsReadOnly="True" />
    </DataGrid.Columns>
</DataGrid>

在方法背后的代码中，每次选中或取消选中复选框时都会调用CellChanges。为了获得价值，我将执行以下操作：

void CellChanged(object sender, RoutedEventArgs e)
{
    if (sender as DataGridCell != null && (sender as DataGridCell).Column != null && (sender as DataGridCell).Column.Header != null)
    {

        bool? isSelected = (e.OriginalSource as ToggleButton).IsChecked;

    }
}

希望它对某人有帮助。

Answer 3

试试这个简单的方法

private void myDataGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
    {
        if (e.Column.SortMemberPath.Equals("EndDate"))
        {
            if (((MyObjectInRow)e.Row.Item).DataFine.Equals(EndDate.MinValue))
            {
                ((MyObjectInRow)e.Row.Item).Completed = 1;
            }
            else
            {
                ((MyObjectInRow)e.Row.Item).Completed = 0;
            }


        }
    }

只需单击UpdateSourceTrigger = SourceUpdated，DataGrid就会捕获单元格值更改事件

3 个答案: