如何在 DataTemplate Button 中同时使用 Command 和 EventTrigger? [英] How to use both Command and EventTrigger in DataTemplate Button?

问题描述

我在 DataTemplate 中有一个按钮，它绑定到我的 ViewModel 中的命令.该按钮还有一个 EventTrigger，它启动一个隐藏编辑控件(按钮是其中一部分)的 Storyboard.

I have a Button in a DataTemplate that is bound to a Command in my ViewModel. The button also has an EventTrigger that kicks off a Storyboard that hides the edit controls (of which the button is a part.)

如果我选择 PreviewMouseDown 事件，情节提要可以正常工作，但命令永远不会被调用.如果我在 EventTrigger 中选择 MouseDown 事件，则命令有效，但情节提要不执行.

The Storyboard works fine if I pick up the PreviewMouseDown event, but the Command never gets called. If I pick up the MouseDown event in my EventTrigger, the Command works, but the Storyboard doesn't execute.

如何在单击按钮时同时执行命令和情节提要?

<Button Content="Save" Command="{Binding SaveCommand}" >
    <Button.Triggers>
        <EventTrigger RoutedEvent="Button.PreviewMouseDown">
            <EventTrigger.Actions>
                <BeginStoryboard Storyboard="{DynamicResource sbCloseTitleEdit}"/>
            </EventTrigger.Actions>
        </EventTrigger>
    </Button.Triggers>
</Button>

推荐答案

我最终通过为包含 DataTemplate 的 ResourceDictionary 添加一个代码隐藏文件来解决我的问题.我不知道这是可能的，但找到了这个解释:

I ended up inelegantly solving my problem by adding a code-behind file for my ResourceDictionary that contains the DataTemplate. I wasn't aware that this was possible, but found this explanation:

是否可以在 WPF 中的资源字典后面设置代码以进行事件处理?

我没有使用 EventTrigger 来开始隐藏编辑控件的 Storyboard，而是在代码隐藏中添加了 Click 处理程序.这有点笨拙，因为我必须相对于单击的按钮来定位面板，因为这是唯一可用的参考，但它可以工作.

Instead of using the EventTrigger to begin a Storyboard that hides the edit controls I added a Click handler to the code-behind. It's a bit kludgy as I have to locate the panels relative to the button clicked as that is the only reference available, but it works.

如果有人有的话，仍在寻找更好的解决方案.

Still looking for a better solution if anyone has one.

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