Handler for the PreviewKeyDown event on the TextBox : TextBox « Windows Presentation Foundation « VB.Net

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

Handler for the PreviewKeyDown event on the TextBox

    

<Window x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Window1" Height="300" Width="300">
  <Grid>
    <StackPanel>
      <TextBox x:Name="uv" PreviewKeyDown="TextBox_PreviewKeyDown" />

    </StackPanel>
  </Grid>
</Window>


//File:Window1.xaml.cs
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media

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

    '
    Private Sub TextBox_PreviewKeyDown(sender As Object, e As RoutedEventArgs)
      Dim textBox As TextBox = TryCast(sender, TextBox)

      If textBox IsNot Nothing Then
        textBox.Foreground = Brushes.Firebrick
      End If
    End Sub
  End Class
End Namespace

   
    
    
    
  

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