ListBoxItem MVVM命令绑定中的WPF ListBox命令 [英] WPF ListBox Commands within ListBoxItem MVVM Command Binding

问题描述

我一直在尝试在 ListBox 控件的 ListBoxItem的中使用命令按钮的方法.我使用 MVVM和通过ICommand接口将命令绑定到DataContext .我找不到从ListBox ItemsSource 中的绑定到Views DataContext的方法.我继续收到命令未找到" 错误.谁能帮助我了解如何实现这一目标.我相信这与命令绑定路径有关，但是我不确定.任何帮助或指示都将很好.

I have been trying to find a way to have command buttons within my ListBoxItem's of a ListBox control. I use MVVM and Command Binding to the DataContext via ICommand interface. I am unable to find a way to bind to the Views DataContext from within the ListBox ItemsSource. I continue to get a Command "Not Found" error. Can anyone help me understand how to accomplish this. I believe that it has something to do with the command binding path, but I am unsure. Any help or direction would be great.

推荐答案

ListBox中项目的DataContext将是它们表示的项目.因此，如果ItemsSource绑定到小部件列表，则ListBoxItem的DataContext将是小部件.

The DataContext of items in a ListBox will be the item they represent. So if your ItemsSource is bound to a list of Widgets, then the DataContext of your ListBoxItem will be a Widget.

如果需要访问ListBox的DataContext，而不是ListBoxItem，则可以使用RelativeSource:

If you need to access the DataContext of the ListBox, rather than the ListBoxItem, then you can use RelativeSource:

<ListBox.ItemTemplate>
    <DataTemplate>
        <Button Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListBox}},
                                  Path=DataContext.MyCommand}" />

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