WPF ContextMenu 绑定问题

WPF ContextMenu 绑定问题

• 第一种

<Window.Resources>
   <vm:MainViewModel x:Key="mvm"/>
</Window.Resources>
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<MenuItem Header="删除" Command="{Binding ResultDeleteCommand,Source={StaticResource mvm}}"
                        CommandParameter="{Binding}"/>

• 第二种, 其中lb为 ListBox

<MenuItem Header="删除2" Command="{Binding DataContext.ResultDeleteCommand,Source={x:Reference Name=lb}}"
                        CommandParameter="{Binding}"/>

<Window x:Class="MvvmPattern.Views.MainWindow"
        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:vm="clr-namespace:MvvmPattern.ViewModels"
        mc:Ignorable="d" FontSize="20"
        Height="450" Width="800">
    <Window.Resources>
        <vm:MainViewModel x:Key="mvm"/>
    </Window.Resources>
    <Window.DataContext>
        <!--<vm:MainViewModel/>-->
        <StaticResource ResourceKey="mvm"/>
    </Window.DataContext>
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
       

        <ListBox Grid.Column="1" ItemsSource="{Binding ResultList}" Name="lb">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Grid Height="30" Background="Transparent">
                        <Grid.ContextMenu>
                            <ContextMenu>
                                <MenuItem Header="删除"
                                          Command="{Binding ResultDeleteCommand,Source={StaticResource mvm}}"
                                          CommandParameter="{Binding}"/>

                                <MenuItem Header="删除2" 
                                          Command="{Binding DataContext.ResultDeleteCommand,Source={x:Reference Name=lb}}"
                                          CommandParameter="{Binding}"/>
                            </ContextMenu>
                        </Grid.ContextMenu>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <TextBlock Text="{Binding Msg}"/>
                        <TextBlock Text="{Binding State}" Grid.Column="1"/>
                        <Button Grid.Column="2" Content="del"
                                Command="{Binding DataContext.ResultDeleteCommand,ElementName=lb}"
                                CommandParameter="{Binding}"/>
                        <!--表示当前数据源-->
                    </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>


    </Grid>
</Window>