从WPF/PowerShell中的datagrid上下文菜单中获取单击的MenuItem标头值

<DataGrid>
    <DataGrid.ContextMenu>
        <ContextMenu>
            <MenuItem Header="菜单项1" Click="MenuItem_Click"/>
            <MenuItem Header="菜单项2" Click="MenuItem_Click"/>
            <MenuItem Header="菜单项3" Click="MenuItem_Click"/>
        </ContextMenu>
    </DataGrid.ContextMenu>
</DataGrid>

Add-Type -AssemblyName PresentationFramework

$datagrid = New-Object System.Windows.Controls.DataGrid

$contextMenu = New-Object System.Windows.Controls.ContextMenu
$menuItem1 = New-Object System.Windows.Controls.MenuItem
$menuItem1.Header = "菜单项1"
$menuItem1.Add_Click({ MenuItem_Click })
$contextMenu.Items.Add($menuItem1)

$menuItem2 = New-Object System.Windows.Controls.MenuItem
$menuItem2.Header = "菜单项2"
$menuItem2.Add_Click({ MenuItem_Click })
$contextMenu.Items.Add($menuItem2)

$menuItem3 = New-Object System.Windows.Controls.MenuItem
$menuItem3.Header = "菜单项3"
$menuItem3.Add_Click({ MenuItem_Click })
$contextMenu.Items.Add($menuItem3)

$datagrid.ContextMenu = $contextMenu

private void MenuItem_Click(object sender, RoutedEventArgs e)
{
    MenuItem clickedMenuItem = sender as MenuItem;
    string header = clickedMenuItem.Header.ToString();
    // 在这里可以使用获取到的标头值进行后续操作
}