如何从 WPF 样式传递当前 DataGridCell 信息

Question

我的样式为 TargetType=DataGridCell，它包含 ContextMenu。我需要通过 CommandParameter 将 DataGridCell 信息传递给该命令。

<Style TargetType="{x:Type DataGridCell}" x:Key="DataGridCellStyle">
    <Setter Property="ContextMenu">
        <Setter.Value>
            <ContextMenu>
                <MenuItem Header="Copy" Command="{Binding CopyToClipBoardCommand, Mode=OneWay}" CommandParameter={}>
                    <MenuItem.DataContext>
                        <cust:CopytoContext/>
                    </MenuItem.DataContext>
                </MenuItem>
            </ContextMenu>
        </Setter.Value>
    </Setter>
</Style>

xmlns:cust="clr-namespace:MyProject.Util"

Class源代码

public class CopytoContext
{
    #region Commands

    public ICommand CopyToClipBoardCommand
    {
        get
        {
            return new DelegatingCommand((object param) =>
            {
                new Action(() =>
                {
                     /// Logic to Copy the Content to Clipboard
                }).Invoke();
            });
        }
    }

    #endregion
}

如何将当前 DataGridCell 信息传递给该命令。请协助我...

Answer 1

如果您不想为控件使用名称，那么您可以使用 RelativeSource 绑定：

<Style TargetType="{x:Type DataGridCell}">
    <Setter Property="ContextMenu">
        <Setter.Value>
            <ContextMenu>
                <MenuItem Header="Copy" Command="{Binding CopyToClipBoardCommand, Mode=OneWay}"
                            CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ContextMenu}, Path=PlacementTarget}">
                    <MenuItem.DataContext>
                        <cust:CopytoContext />
                    </MenuItem.DataContext>
                </MenuItem>
            </ContextMenu>
        </Setter.Value>
    </Setter>
</Style>

ContextMenu returns ContextMenu 附加的控件的 PlacementTarget 属性（ 单元格 在这种情况下）。然后在你的命令中你可以使用这个代码：

DataGridCell dataGridCell = param as DataGridCell;
if (dataGridCell != null)
{
    TextBlock textBlock = dataGridCell.Content as TextBlock;
    if (textBlock != null)
    {
        Clipboard.SetText(textBlock.Text);
    }
}

希望对您有所帮助

如何从 WPF 样式传递当前 DataGridCell 信息

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