The EventToCommandBehavior lets you link a command to an event in your UI. For example, the Text Editor control has a TextChanged event. With this behavior, you can trigger a command whenever that event occurs—like showing a toast notification every time the text is modified.
Examples
<Rock:FieldContainer>
<Rock:TextEditor>
<Rock:TextEditor.Behaviors>
<Rock:EventToCommandBehavior EventName="TextChanged"
Command="{Binding ShowToast}"
CommandParameter="The text has been changed." />
</Rock:TextEditor.Behaviors>
</Rock:TextEditor >
</Rock:FieldContainer>