如何将按钮的Hold / DoubleTap事件绑定到ViewModel中的属性

Question

I have a view containing a button. And i want to perform an action on Hold event. How can i do this in mvvm? For Tap event i can Bind it to a Command property. Is it possible to do this with same way?

Answer 1

不知道它是否支持该命令，否则，您可以使用MVVM Light Toolkit（免费和开源）行为：EventToCommand

Answer 2

I would go with Braulio's answer - MVVM Light is what I would use, but back in the Silverlight 3 days I used custom attached properties to achieve this. See here for an example of custom attached properties: http://umairsaeed.com/2010/04/22/custom-attached-properties-in-silverlight/

You could create a custom attached property for the hold event to bind the command to and then use it like so:

<Border local:MyTextBoxControl.HoldEventCommand="{Binding HoldCommand}"/>

This is a lot of work compared with including the mvvm light toolkit in your project and then doing this:

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Hold">
        <GalaSoft_MvvmLight_Command:EventToCommand Command="{Binding YourCommand}"/>
    </i:EventTrigger>
</i:Interaction.Triggers>