XAML 2009 Features: XAML Event handling
[This is part of a series on New WPF\XAML Features]
In previous releases, when loose XAML had events in it and was loaded it would crash. In V4, there are 2 options to avoid this crash.
à On loading events are searched on the root object of the XAML file. Suppose you had the loose XAML like the below
<local:MyStackPanel
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:local ="clr-namespace:DemoApp;assembly=DemoApp">
<Button Click="Button_Click" >Date (Event on Root)</Button>
As long as the root object (in this case MyStackPanel) can be found, the event will be hooked and will work fine without a crash
à The second approach is to define a MarkupExtension that returns a delegate and assign this to the event. So you could have XAML like the below
<Button Click="{DelegateCreatingME}"/>
<Button Click="{DelegateCreatingME ChangeFontSize}" >
<Button Click="{DelegateCreatingME ChangeForeground,Brown}" />
The sample project using the CoreMVVM library is attached.
Note that XAML 2009 features work only for loose XAML in WPF.
