DataGrid上下文菜单事件未触发

本文关键字：事件 上下文 菜单 DataGrid | 更新日期: 2023-09-27 18:19:24

我有:

<window>
<Window.Resources>        
    <DataTemplate DataType="{x:Type viewModel:LogsViewModel}" >
                            <DataGrid Name="MainLogDataGrid" ItemsSource="{Binding MainLogDataGrid}">
<DataGrid.ContextMenu>
<ContextMenu Name="MainGridContextMenu" >
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonUp" >
<i:InvokeCommandAction Command="{Binding OnMainDataGridContextMenuChange}" 
                 CommandParameter="{Binding ElementName=MainGridContextMenu, Path=PlacementTarget}" /> 
</i:EventTrigger>
</i:Interaction.Triggers>
<MenuItem Header="Insert Row" Name="InsertRowMenuItem" TabIndex="0" />
</ContextMenu>
</DataGrid.ContextMenu>
</DataGrid>
<DataTemplate DataType="{x:Type viewModel:ReportsViewModel}">
    <Label FontSize="50">THIS IS WHERE THE REPORTS GO</Label>
</DataTemplate>
</Window.Resources>
</Window>
<ContentControl  Content="{Binding CurrentPageViewModel}" />

    class LogsViewModel : ObservableObject, IViewModel
    {
        public RelayCommand<object> OnMainDataGridContextMenuChange { get; private set; }
        public LogsViewModel()
        {
            OnMainDataGridContextMenuChange = new RelayCommand<object>(MainGridContextMenuItemChange);
        }
        private void MainGridContextMenuItemChange(object menuItem)
        {
            var item = menuItem as MenuItem;
        }
}

问题是MainGridContextMenuItemChange方法永远不会到达。这可能与上下文菜单没有看到LogsViewModel DataContext有关吗?我怎样才能把这个连接起来?谢谢。

DataGrid上下文菜单事件未触发

试试这个

 <ContextMenu Name="MainGridContextMenu"  DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Mode=Self}}">

ContextMenu不是LogicalTree的一部分，所以它不能从Parent继承DataContext .然而，ContextMenu确实有PlacementTarget属性，我们可以使用它来获取DataGrid的DataContext，使用如上所示的绑定。

设置ContextMenu的DataContext的第二个选项是

 <ContextMenu Name="MainGridContextMenu" DataContext="{Binding DataContext, Source={x:Reference MainLogDataGrid}}">
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