"Wpf/waf" uses System.Windows.Interactivity interactive events

Download the System.Windows.Interactivity.dll file and introduce it into the project (as you can see in the reference list of the VS project).

Using the DLL in XAML

Xmlns:i= "Clr-namespace:system.windows.interactivity;assembly=system.windows.interactivity"

<!--get focus, lose focus event for TextBox control -<TextBoxText= "Test">    <i:interaction. Triggers>        <I:eventtriggerEventName= "LostFocus">            <i:invokecommandactionCommand="{Binding Relativesource={relativesource ancestortype=window},path=datacontext.ontextlostfocus}"CommandParameter="{Binding Relativesource={relativesource mode=findancestor, ancestorlevel=1, Ancestortype={x:type TextBox}}} "/>        </I:eventtrigger>        <I:eventtriggerEventName= "GotFocus">            <i:invokecommandactionCommand="{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>

Because System.Windows.Interactivity's smart hints are not supported in VS, it is often important to check which methods the EventTrigger can trigger, all EventName The list is as follows:

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

"Wpf/waf" uses System.Windows.Interactivity interactive events