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| 24.14.11.TextBox PreviewKeyDown, PreviewKeyUp, PreviewTextInput, KeyDown, KeyUp and TextChanged events |
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<Window x:Class="RoutedEvents.KeyPressEvents"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="KeyPressEvents" Height="400" Width="400" >
<StackPanel>
<DockPanel Margin="5">
<TextBlock Margin="3" >Type here:</TextBlock>
<TextBox PreviewKeyDown="KeyEvent" KeyDown="KeyEvent"
PreviewKeyUp="KeyEvent" KeyUp="KeyEvent"
PreviewTextInput="TextInput"
TextChanged="TextChanged"></TextBox>
</DockPanel>
<ListBox Margin="5" Name="lstMessages"></ListBox>
<CheckBox Margin="5" Name="chkIgnoreRepeat">Ignore Repeated Keys</CheckBox>
<Button Click="cmdClear_Click" HorizontalAlignment="Right">Clear List</Button>
</StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
namespace RoutedEvents
{
public partial class KeyPressEvents : System.Windows.Window
{
public KeyPressEvents()
{
InitializeComponent();
}
private void KeyEvent(object sender, KeyEventArgs e)
{
if ((bool)chkIgnoreRepeat.IsChecked && e.IsRepeat) return;
string message = "Event: " + e.RoutedEvent + " " + " Key: " + e.Key;
lstMessages.Items.Add(message);
}
private void TextInput(object sender, TextCompositionEventArgs e)
{
string message = "Event: " + e.RoutedEvent + " " + " Text: " + e.Text;
lstMessages.Items.Add(message);
}
private void TextChanged(object sender, TextChangedEventArgs e)
{
string message = "Event: " + e.RoutedEvent;
lstMessages.Items.Add(message);
}
private void cmdClear_Click(object sender, RoutedEventArgs e)
{
lstMessages.Items.Clear();
}
}
}
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