StackPanel PreviewTextInput and PreviewKeyDown : Key Event « Windows Presentation Foundation « VB.Net

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VB.Net » Windows Presentation Foundation » Key EventScreenshots 
StackPanel PreviewTextInput and PreviewKeyDown
StackPanel PreviewTextInput and PreviewKeyDown
    


<Window x:Class="RoutedEvents.OnlyNumbers"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Only Numbers" Height="300" Width="300">
    <StackPanel Margin="5" PreviewTextInput="pnl_PreviewTextInput" PreviewKeyDown="pnl_PreviewKeyDown">
        <TextBox Margin="3" AcceptsTab="False"></TextBox>
        <TextBox Margin="3"></TextBox>
        <TextBox Margin="3"></TextBox>
    </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 OnlyNumbers
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()
    End Sub
    Private Sub pnl_PreviewTextInput(sender As Object, e As TextCompositionEventArgs)
      Dim val As Short
      If Not Int16.TryParse(e.Text, valThen
        e.Handled = True
      End If
    End Sub

    Private Sub pnl_PreviewKeyDown(sender As Object, e As KeyEventArgs)
      If e.Key = Key.Space Then
        e.Handled = True
      End If
    End Sub
  End Class
End Namespace

   
    
    
    
  
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