wpf - 从数据模板内部绑定(bind)到 View 模型

Question

我显示了多个视频，它们与 Mainviewmodel 中的视频集合绑定(bind)。一切正常，直到我尝试将输入命令绑定(bind)到 Mainviewmodel。我不知道这个的语法。就目前而言，绑定(bind)设置为 Video 而不是 Mainviewmodel。

错误信息:

'StartVideoCommand' property not found on 'object' ''Video'   

xml:

<Window.Resources>
  <local:MainViewModel x:Key="MainViewModel"/>
</Window.Resources>
  <Grid DataContext="{StaticResource MainViewModel}">
    <ListBox ItemsSource="{Binding Videos}">
      <ListBox.ItemTemplate>
        <DataTemplate>
          <Grid>
            <Grid.InputBindings>

!!!           <KeyBinding Key="Enter" Command="{Binding StartVideo}" /> !Bound to Video not to Mainviewmodel grrr  

            </Grid.InputBindings>
             ... layout stuff
              <TextBlock Text="{Binding Title}" Grid.Column="0" Grid.Row="0" Foreground="White"/>
              <TextBlock Text="{Binding Date}" Grid.Column="0" Grid.Row="1" Foreground="White" HorizontalAlignment="Left"/>
              <TextBlock Text="{Binding Length}" Grid.Column="1" Grid.Row="1" Foreground="White" HorizontalAlignment="Right"/>
             ... closing tags

Answer 1

Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=DataContext.StartVideo}"