TextBox PreviewTextInput : TextBox « Windows Presentation Foundation « VB.Net

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

TextBox PreviewTextInput

    



<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" PreviewTextInput="TextBox_TextEvent"/>
        <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_TextEvent(sender As Object, e As TextCompositionEventArgs)
      Dim msg As [String] = [String].Format("{0} - {1}" & vbLf, e.RoutedEvent.Name, e.Text)

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

   
    
    
    
  

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