TextBox PreviewKeyDown, PreviewKeyUp, PreviewTextInput, KeyDown, KeyUp and TextChanged events : Key Event « Windows Presentation Foundation « VB.Net

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VB.Net » Windows Presentation Foundation » Key EventScreenshots 
TextBox PreviewKeyDown, PreviewKeyUp, PreviewTextInput, KeyDown, KeyUp and TextChanged events
TextBox PreviewKeyDown, PreviewKeyUp, PreviewTextInput, KeyDown, KeyUp and TextChanged events
    
<Window x:Class="RoutedEvents.KeyPressEvents"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="KeyPressEvents" Height="400" Width="400" >
    <StackPanel>
          <DockPanel Margin="5">
            <TextBlock Margin="3" >Type here:</TextBlock>
            <TextBox PreviewKeyDown="KeyEvent" KeyDown="KeyEvent" 
                     PreviewKeyUp="KeyEvent" KeyUp="KeyEvent"
                     PreviewTextInput="TextInput"
                     TextChanged="TextChanged"></TextBox>
          </DockPanel>
      <ListBox Margin="5" Name="lstMessages"></ListBox>
      <CheckBox Margin="5" Name="chkIgnoreRepeat">Ignore Repeated Keys</CheckBox>
      <Button Click="cmdClear_Click" HorizontalAlignment="Right">Clear List</Button>
    </StackPanel>
</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 RoutedEvents
  Public Partial Class KeyPressEvents
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub KeyEvent(sender As Object, e As KeyEventArgs)
      If CBool(chkIgnoreRepeat.IsCheckedAndAlso e.IsRepeat Then
        Return
      End If

      Dim message As String = "Event: " & Convert.ToString(e.RoutedEvent" " " Key: " & Convert.ToString(e.Key)
      lstMessages.Items.Add(message)
    End Sub

    Private Sub TextInput(sender As Object, e As TextCompositionEventArgs)
      Dim message As String = "Event: " & Convert.ToString(e.RoutedEvent" " " Text: " & e.Text
      lstMessages.Items.Add(message)
    End Sub

    Private Sub TextChanged(sender As Object, e As TextChangedEventArgs)
      Dim message As String = "Event: " & Convert.ToString(e.RoutedEvent)
      lstMessages.Items.Add(message)
    End Sub

    Private Sub cmdClear_Click(sender As Object, e As RoutedEventArgs)
      lstMessages.Items.Clear()
    End Sub
  End Class
End Namespace

   
    
    
    
  
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