Handler for the PreviewKeyDown event on the TextBox : TextBox Action « Windows Presentation Foundation « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Windows Presentation Foundation
3. TextBox Action

<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
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
            DataContext = this;
        }

        //
        private void TextBox_PreviewKeyDown(object sender, RoutedEventArgs e)
        {
            TextBox textBox = sender as TextBox;

            if (textBox != null)
            {
                textBox.Foreground = Brushes.Firebrick;
            }
        }
    }
}

24.14.TextBox Action
	24.14.1.	React to TextBox focus event
	24.14.2.	TextBox MouseLeftButtonDown action and PreviewMouseLeftButtonDown action
	24.14.3.	Listen to TextBox text changed event
	24.14.4.	Handler for the PreviewKeyDown event on the TextBox
	24.14.5.	TextBox PreviewKeyDown
	24.14.6.	TextBox KeyDown action
	24.14.7.	TextBox PreviewKeyUp
	24.14.8.	TextBox KeyUp
	24.14.9.	TextBox TextInput event
	24.14.10.	TextBox PreviewTextInput
	24.14.11.	TextBox PreviewKeyDown, PreviewKeyUp, PreviewTextInput, KeyDown, KeyUp and TextChanged events