C# Can'；t将ContextMenu操作绑定到命令

我已经搜索并阅读了关于ContextMenus和binding的所有内容，以及它如何不在树中。。。等等，所以搜索让我觉得我已经筋疲力尽了，只是不理解它

我正试图让我的ContextMenu AddTournamentCommand运行，但我就是无法让它运行。我最近发现了通过数据源绑定到对象的简单方法，因此，如果有一种简单的方法，而不是手工编码来连接，请告诉我。这就是我到目前为止所做的：

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:Models="clr-namespace:FumbblApiClient.Models" mc:Ignorable="d" x:Name="FumbblMainWindow" x:Class="FumbblApiClient.MainWindow"
        Title="MainWindow" Height="499.45" Width="639" Loaded="Window_Loaded">
    <Window.Resources>
        <CollectionViewSource x:Key="groupViewSource" d:DesignSource="{d:DesignInstance {x:Type Models:Group}, CreateList=True}"/>
        <CollectionViewSource x:Key="groupTournamentsViewSource" Source="{Binding Tournaments, Source={StaticResource groupViewSource}}"/>
    </Window.Resources>
    <Grid Margin="0,0,2,0">
        <TabControl Margin="10">
            <TabItem Header="Groups">
                <Grid Background="#FFE5E5E5" DataContext="{StaticResource groupViewSource}">
                    <TextBox x:Name="GroupIdTextBox" HorizontalAlignment="Left" Height="23" Margin="10,10,0,0" TextWrapping="Wrap" Text="Group ID" VerticalAlignment="Top" Width="100" Grid.Column="1"/>
                    <Button Content="Fetch" HorizontalAlignment="Left" Margin="115,11,0,0" VerticalAlignment="Top" Width="61" Click="GroupFetch_Click" Grid.Column="1" Height="22"/>
                    <ListBox x:Name="groupListView" ItemsSource="{Binding}" Margin="10,38,0,10" SelectionMode="Single" HorizontalAlignment="Left" Width="166" SelectionChanged="GroupList_SelectionChanged">
                    </ListBox>
                    <Grid x:Name="grid1" Margin="181,38,10,0" VerticalAlignment="Top" Height="369">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>
                        <Label Content="Id:" Grid.Column="0" HorizontalAlignment="Left" Margin="3" Grid.Row="0" VerticalAlignment="Center"/>
                        <TextBox x:Name="idTextBox" Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="3" Grid.Row="0" Text="{Binding Id, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" VerticalAlignment="Center" Width="120"/>
                        <Label Content="Name:" Grid.Column="0" HorizontalAlignment="Left" Margin="3" Grid.Row="1" VerticalAlignment="Center"/>
                        <TextBox x:Name="nameTextBox" Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="3" Grid.Row="1" Text="{Binding Name, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" VerticalAlignment="Center" Width="120"/>
                        <Label Content="Tournaments:" HorizontalAlignment="Left" Margin="3" Grid.Row="2" VerticalAlignment="Center"/>
                        <ListBox x:Name="tournamentsListView" ItemsSource="{Binding Source={StaticResource groupTournamentsViewSource}}" Margin="3,3,-182,-260" SelectionMode="Multiple" Grid.Row="2" Grid.Column="1">
                            <ListBox.ItemContainerStyle>
                                <Style TargetType="{x:Type ListBoxItem}">
                                    <EventSetter Event="UIElement.PreviewMouseRightButtonDown" Handler="EmptyHandler"/>
                                </Style>
                            </ListBox.ItemContainerStyle>
                            <ListBox.ContextMenu>
                                <ContextMenu>
                                    <MenuItem Header="Add To Selected Tournaments" Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=PlacementTarget.DataContext.AddTournamentCommand}"/>
                                </ContextMenu>
                            </ListBox.ContextMenu>
                        </ListBox>
                    </Grid>
                </Grid>
            </TabItem>
            <TabItem Header="Tournaments">
                <Grid Background="#FFE5E5E5" Margin="0,0,0,-2">
                    <ListBox HorizontalAlignment="Left" Margin="10,10,0,10" Width="166"/>
                </Grid>
            </TabItem>
            <TabItem Header="Teams">
            </TabItem>
            <Grid Margin="0,0,-10,10"/>
        </TabControl>

    </Grid>
</Window>

像这样改变,

 <ContextMenu>
    <MenuItem Header="Add To Selected Tournaments" Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=AddTournamentCommand}"/>
  </ContextMenu>

---

PlacementTarget

属性位于

上下文菜单上，而不在窗口上。转到上下文菜单，而不是窗口。无论如何，窗口不在ContextMenu的可视树中，所以您无法使用RelativeSource访问它

<ContextMenu>
   <MenuItem Header="Add To Selected Tournaments"
             Command="{Binding RelativeSource={RelativeSource
                               AncestorType={x:Type ContextMenu}},
                        Path=PlacementTarget.DataContext.AddTournamentCommand}"/>
</ContextMenu>



使用上述代码，您将获得PlacementTarget的dataContext，它将是ListBox的dataContext，如果您没有在ListBox上显式设置dataContext，它将从窗口继承它，您的代码将正常工作


更新

您可以将窗口数据上下文存储在ListBox的标记中，并使用它进行绑定

<ListBox Tag="{Binding DataContext,
               RelativeSource={RealtiveSource Mode=FindAncestor, 
                              AncestorType=Window}}"/>



并在ContextMenu中使用标记绑定：

<ContextMenu>
   <MenuItem Header="Add To Selected Tournaments"
             Command="{Binding RelativeSource={RelativeSource
                               AncestorType={x:Type ContextMenu}},
                        Path=PlacementTarget.Tag.AddTournamentCommand}"/>
</ContextMenu>


Lol，与WinForms相比，WPF中的某些东西有多么困难，这仍然让我感到惊讶。在WinForms中，只需单击鼠标左键即可。但树中没有窗口，对吗？这没有约束力。给我：找不到引用为“RelativeSource FindAncestor，AncestorType='System.Windows.Window'，AncestorLevel='1'的绑定源。BindingExpression:Path=AddTournamentCommand；DataItem=null；目标元素是“MenuItem”（名称=“”）；目标属性为“Command”（类型为“ICommand”），如果在XAML中查找，则列表框确实具有不同的DataContext。我如何绕过它，或者如何在该上下文中获取命令？它绑定到一个对象模型，所以我不太愿意在它上面放一个命令对象。这确实解决了绑定问题。我仍然无法触发这个动作，所以我最后只是做了一个按钮，以避免让自己过于沮丧。
<ContextMenu>
   <MenuItem Header="Add To Selected Tournaments"
             Command="{Binding RelativeSource={RelativeSource
                               AncestorType={x:Type ContextMenu}},
                        Path=PlacementTarget.Tag.AddTournamentCommand}"/>
</ContextMenu>