WPF 数据绑定到同一控件中的属性

发布于 2024-10-04 09:03:51 字数 1446 浏览 4 评论 0 原文

在此示例中，按钮的 IsEnabled 属性绑定到网格的选定行“本地”属性，并且工作正常：

        <Button DockPanel.Dock="Bottom" Width="100" Height="100" IsEnabled="{Binding ElementName=dataGridRestore , Path=SelectedItem.Local}"></Button>

        <my:DataGrid x:Name="dataGridRestore" 
                     ItemsSource="{Binding}" 
                     >

            <my:DataGrid.ContextMenu>
                <ContextMenu Name="restoreCntextMenu">
                    <MenuItem Header="Open" />
                </ContextMenu>
            </my:DataGrid.ContextMenu>

            <my:DataGridCheckBoxColumn Header="Local" Binding="{Binding Local}"  />
        </my:DataGrid>

现在，当我将按钮从网格外部移动到网格上下文菜单内部时，我的绑定不会不工作。这是为什么？我该如何解决它？

        <my:DataGrid x:Name="dataGridRestore" 
                     ItemsSource="{Binding}" 
                     >

            <my:DataGrid.ContextMenu>
                <ContextMenu Name="restoreCntextMenu">
                    <MenuItem Header="Open" />
                    <Button  Width="100" Height="100" IsEnabled="{Binding ElementName=dataGridRestore , Path=SelectedItem.Local}"></Button>
                </ContextMenu>
            </my:DataGrid.ContextMenu>

            <my:DataGridCheckBoxColumn Header="Local" Binding="{Binding Local}"  />
        </my:DataGrid>

原文

In this example the IsEnabled property of my button is bound to the selected rows "Local" property of the grid and it works just fine:

        <Button DockPanel.Dock="Bottom" Width="100" Height="100" IsEnabled="{Binding ElementName=dataGridRestore , Path=SelectedItem.Local}"></Button>

        <my:DataGrid x:Name="dataGridRestore" 
                     ItemsSource="{Binding}" 
                     >

            <my:DataGrid.ContextMenu>
                <ContextMenu Name="restoreCntextMenu">
                    <MenuItem Header="Open" />
                </ContextMenu>
            </my:DataGrid.ContextMenu>

            <my:DataGridCheckBoxColumn Header="Local" Binding="{Binding Local}"  />
        </my:DataGrid>

Now when I move the button from outside my grid to inside the context menu of the grid my binding doesn't work. Why is this and how can i fix it?

        <my:DataGrid x:Name="dataGridRestore" 
                     ItemsSource="{Binding}" 
                     >

            <my:DataGrid.ContextMenu>
                <ContextMenu Name="restoreCntextMenu">
                    <MenuItem Header="Open" />
                    <Button  Width="100" Height="100" IsEnabled="{Binding ElementName=dataGridRestore , Path=SelectedItem.Local}"></Button>
                </ContextMenu>
            </my:DataGrid.ContextMenu>

            <my:DataGridCheckBoxColumn Header="Local" Binding="{Binding Local}"  />
        </my:DataGrid>

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浊酒尽余欢 2024-10-11 09:03:51

使用此代码：

<ContextMenu DataContext="{Binding PlacementTarget.SelectedItem, RelativeSource={RelativeSource Self}}">
    <Button IsEnabled="{Binding Local}"/>
</ContextMenu>

我使用 DataGridRows 的 ContextMenu 对其进行了测试，并且工作正常。

Use this code:

<ContextMenu DataContext="{Binding PlacementTarget.SelectedItem, RelativeSource={RelativeSource Self}}">
    <Button IsEnabled="{Binding Local}"/>
</ContextMenu>

I tested it with ContextMenu of DataGridRows and it worked fine.

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孤单情人 2024-10-11 09:03:51

使用RelativeSource 属性而不是ElementName 怎么样？

现在无法测试它，但类似这样：

<Button  Width="100" Height="100" IsEnabled="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type my:DataGrid}},Path=SelectedItem.Local}"></Button>

What about using the RelativeSource attribute instead of the ElementName?

can't test it right now but something like this :

<Button  Width="100" Height="100" IsEnabled="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type my:DataGrid}},Path=SelectedItem.Local}"></Button>

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