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.IsChecked) AndAlso 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

1.	Creating a KeyBinding between the Open command and Ctrl-R
2.	Command Handler Key Binding
3.	Use Keyboard.Focus to set the focus to a Text Field
4.	Provide Quick Keyboard Access to Buttons
5.	Reading keyboard modifiers
6.	Reading individual key state with Keyboard.IsKeyDown
7.	Use InputBinding to bind Application commends to Key events
8.	Suppress Keyboard and Mouse Events
9.	Query Left / Right control key
10.	Is Key.CapsLock Toggled
11.	Keyboard.IsKeyToggled
12.	Query Number lock key
13.	Use KeyBinding to bind Key event to TextBox.InputBindings
14.	Custom Command by KeyGesture and RoutedUICommand
15.	StackPanel PreviewTextInput and PreviewKeyDown
16.	If input is not a number do not handle the key event
17.	RoutedEvents: Tunneled Key Press
18.	On Key Down Handler

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

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