【WPF/WAF】使用System.Windows.Interactivity交互事件

下载System.Windows.Interactivity.dll文件，并引入项目中（在VS项目的引用列表中可以看到）。可在Nuget搜索System.Windows.Interactivity下载安装到项目中。

XAML中使用该dll

 xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

<!-- TextBox控件的获得焦点、失去焦点事件 -->
<TextBox Text="Test">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="LostFocus">
            <i:InvokeCommandAction Command="{Binding RelativeSource={RelativeSource AncestorType=Window},Path=DataContext.OnTextLostFocus}"
                                   CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type TextBox}}}"/>
        </i:EventTrigger>
        <i:EventTrigger EventName="GotFocus">
            <i:InvokeCommandAction Command="{Binding RelativeSource={RelativeSource AncestorType=Window},Path=DataContext.OnTextGotFocus}"
                                   CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorLevel=1, AncestorType={x:Type TextBox}}}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>
</TextBox>

由于VS中不支持System.Windows.Interactivity的智能提示，经常要查阅这个EventTrigger还能触发哪些方法，所有EventName的列表如下：

• MSDN中Grid Events https://msdn.microsoft.com/en-us/library/system.windows.controls.grid_events(v=vs.110).aspx