TextBox PreviewKeyDown : TextBox Event « Windows Presentation Foundation « VB.Net Tutorial

1. VB.Net Tutorial
2. Windows Presentation Foundation
3. TextBox Event

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF " Height="300" Width="300">
    <DockPanel LastChildFill="True">
        <TextBox DockPanel.Dock="Top"
                 PreviewKeyDown="TextBox_KeyEvent" />
        <TextBox Name="txtLog" HorizontalAlignment="Stretch" 
                 IsReadOnly="True" VerticalScrollBarVisibility="Visible"/>
    </DockPanel>
</Window>

//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Input

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub TextBox_KeyEvent(sender As Object, e As KeyEventArgs)
      Dim msg As [String] = [String].Format("{0} - {1}" & vbLf, e.RoutedEvent.Name, e.Key)

      txtLog.Text += msg
      txtLog.ScrollToEnd()
    End Sub

  End Class
End Namespace

16.5.TextBox Event
	16.5.1.	Provide Keyboard Access to Text Boxes
	16.5.2.	TextBox PreviewTextInput
	16.5.3.	TextBox text changed event
	16.5.4.	TextBox TextChanged event
	16.5.5.	TextBox PreviewKeyDown
	16.5.6.	TextBox KeyDown
	16.5.7.	TextBox PreviewKeyUp
	16.5.8.	TextBox KeyUp
	16.5.9.	TextBox TextInput