带有 ItemsSource 的 WPF ContextMenu - 如何绑定到每个项目中的 Command？
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WPF ContextMenu with ItemsSource - how to bind to Command in each item?
提问by Tomá? Kafka
Possible Duplicate:
Specify Command for MenuItem in a DataTemplate
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.
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。
If I wanted to do the menu statically, I do it like this:
如果我想静态地做菜单，我这样做：
<ContextMenu>
<MenuItem Header="{Binding Text1}" Command={Binding Command1}>
<MenuItem Header="{Binding Text2}" Command={Binding Command2}>
</ContextMenu>
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.
但是当我事先不知道这些项目（它们来自一个集合）时，我需要分配 ContextMenu.ItemsSource - 并将文本放入 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>
This way, however, I have no place to bind a Command to - because I can't get the MenuItem for every row!
但是，通过这种方式，我没有地方可以将 Command 绑定到 - 因为我无法获取每一行的 MenuItem！
Any advice, please? Thank you, guys!
请问有什么建议吗？谢谢你们！
回答by itowlson
<ContextMenu.ItemContainerStyle>
<Style TargetType="MenuItem">
<Setter Property="Command" Value="{Binding AssociatedCommand}" />
</Style>
</ContextMenu.ItemContainerStyle>
where AssociatedCommand is the property on the viewmodel object that holds the ICommand.
其中 AssociatedCommand 是保存 ICommand 的视图模型对象上的属性。
