带有 ItemsSource 的 WPF ContextMenu - 如何在每个项目中绑定到 Command? [英] WPF ContextMenu with ItemsSource - how to bind to Command in each item?

问题描述

可能重复:
在 DataTemplate 中为 MenuItem 指定命令

我有一组代表菜单项的对象(视图模型).他们每个人都有一个我想在单击 MenuItem 时执行的命令.

I have a collection of objects (viewmodels) that represent menu items. Each of them have a command that I would like to execute when a MenuItem is clicked.

如果我想静态地做菜单，我会这样做:

If I wanted to do the menu statically, I do it like this:

<ContextMenu>
    <MenuItem Header="{Binding Text1}" Command={Binding Command1}>
    <MenuItem Header="{Binding Text2}" Command={Binding Command2}>
</ContextMenu>

但是当我事先不知道项目(它们来自集合)时，我需要分配 ContextMenu.ItemsSource - 并将文本放入 ItemTemplate.

but when I don't know the items in advance (they come from a collection), I need to assign ContextMenu.ItemsSource - and put a text into a ItemTemplate.

<ContextMenu ItemsSource="{Binding MyMenuItems}">
    <ContextMenu.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Text2}" /> <!-- But where to put Command binding? TextBlock.Command makes no sense, and we have no access to MenuItem! -->
        </DataTemplate>
    </ContextMenu.ItemTemplate>
</ContextMenu>

但是，这样一来，我就无法将 Command 绑定到 - 因为我无法为每一行获取 MenuItem！

This way, however, I have no place to bind a Command to - because I can't get the MenuItem for every row!

有什么建议吗?谢谢各位！

Any advice, please? Thank you, guys!

推荐答案

<ContextMenu.ItemContainerStyle>
  <Style TargetType="MenuItem">
    <Setter Property="Command" Value="{Binding AssociatedCommand}" />
  </Style>
</ContextMenu.ItemContainerStyle>

其中 AssociatedCommand 是 viewmodel 对象上包含 ICommand 的属性.

where AssociatedCommand is the property on the viewmodel object that holds the ICommand.

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