Cancel event by setting CanExecute and Handled to false

     

<Window x:Class="Commands.NoCommandTextBox"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="NoCommandTextBox" Height="300" Width="300">
    <Grid>
      <TextBox Name="txt"/>
    </Grid>
</Window>
//File:Window.xaml.vb
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes

Namespace Commands
  Public Partial Class NoCommandTextBox
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()


      txt.CommandBindings.Add(New CommandBinding(ApplicationCommands.Cut, Nothing, AddressOf SuppressCommand))
    End Sub

    Private Sub SuppressCommand(sender As Object, e As CanExecuteRoutedEventArgs)
      e.CanExecute = False
      e.Handled = True
    End Sub
  End Class
End Namespace

1.	Get event sender from event
2.	Handle the ContentRendered event
3.	Find source element of an element in event handler by casting
4.	Add an event handler to an element using code
5.	Halting event routing with Handled
6.	Security Exception
7.	Throw Handled Exception
8.	Check handler event sender
9.	Do event based on button name
10.	Add event handler to StackPanel in StackPanel resource
11.	Add a PropertyChangedValueCallback to Any Dependency Property
12.	Handle a Button Click with Shared button click handler
13.	DispatcherTimer and EventHandler
14.	Thumb DragStarted and DragCompleted event handler
15.	Set interval and event handler for DispatcherTimer
16.	Get the event sender name
17.	Event firing sequence
18.	Event sender, event source and event original source
19.	Cast event sender to a control
20.	Fire an event when an element gains and loses focus.

Cancel event by setting CanExecute and Handled to false : Event « Windows Presentation Foundation « VB.Net

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