RoutedEvents Only Numbers : RoutedCommand « Windows Presentation Foundation « VB.Net Tutorial

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VB.Net Tutorial » Windows Presentation Foundation » RoutedCommand 
16.92.12.RoutedEvents Only Numbers
<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
WPF Routed Events Only Numbers
16.92.RoutedCommand
16.92.1.Create a custom RoutedCommand, the CommandBinding objects, and the KeyBinding objects in code.Create a custom RoutedCommand, the CommandBinding objects, and the KeyBinding objects in code.
16.92.2.Convert RoutedEventArgs.OriginalSource to event senderConvert RoutedEventArgs.OriginalSource to event sender
16.92.3.RoutedEvents: Button Mouse Up EventRoutedEvents: Button Mouse Up Event
16.92.4.RoutedEvents: Drag And DropRoutedEvents: Drag And Drop
16.92.5.RoutedEvents: Focus eventRoutedEvents: Focus event
16.92.6.RoutedEvents: Key ModifiersRoutedEvents: Key Modifiers
16.92.7.RoutedEvents: Key Press EventsRoutedEvents: Key Press Events
16.92.8.RoutedEvents: Mouse PositionRoutedEvents: Mouse Position
16.92.9.Bubble routed events, and write an event handler for a routed event.Bubble routed events, and write an event handler for a routed event.
16.92.10.Get RoutedEvent NameGet RoutedEvent Name
16.92.11.Create RoutedCommand from InputGestureCollectionCreate RoutedCommand from InputGestureCollection
16.92.12.RoutedEvents Only NumbersRoutedEvents Only Numbers
16.92.13.Routed Event DemoRouted Event Demo
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