WPF - Keyboard

There are many types of keyboard inputs such as KeyDown, KeyUp, TextInput, etc. In the following example, some of the keyboard inputs are handled. The following example defines a handler for the Click event and a handler for the KeyDown event.

• Let’s create a new WPF project with the name WPFKeyboardInput.

• Drag a textbox and a button to a stack panel and set the following properties and events as shown in the following XAML file.

<Window x:Class = "WPFKeyboardInput.MainWindow" 
   xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
   xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml" 
   xmlns:d = "http://schemas.microsoft.com/expression/blend/2008" 
   xmlns:mc = "http://schemas.openxmlformats.org/markup-compatibility/2006" 
   xmlns:local = "clr-namespace:WPFKeyboardInput" 
   mc:Ignorable = "d" Title = "MainWindow" Height = "350" Width = "604"> 
	
   <Grid> 
      <StackPanel Orientation = "Horizontal" KeyDown = "OnTextInputKeyDown"> 
         <TextBox Width = "400" Height = "30" Margin = "10"/> 
         <Button Click = "OnTextInputButtonClick"
            Content = "Open" Margin = "10" Width = "50" Height = "30"/> 
      </StackPanel> 
   </Grid> 
	
</Window> 

Here is the C# code in which different keyboard and click events are handled.

using System.Windows; 
using System.Windows.Input; 

namespace WPFKeyboardInput { 
   /// <summary> 
      /// Interaction logic for MainWindow.xaml 
   /// </summary> 
	
   public partial class MainWindow : Window { 
	
      public MainWindow() { 
         InitializeComponent(); 
      } 
		
      private void OnTextInputKeyDown(object sender, KeyEventArgs e) {
		
         if (e.Key == Key.O && Keyboard.Modifiers == ModifierKeys.Control) { 
            handle(); 
            e.Handled = true; 
         } 
			
      } 
		
      private void OnTextInputButtonClick(object sender, RoutedEventArgs e) { 
         handle(); 
         e.Handled = true; 
      } 
		
      public void handle() { 
         MessageBox.Show("Do you want to open a file?"); 
      }
		
   } 
}

When the above code is compiled and executed, it will produce the following window −

If you click the Open button or press CTRL+O keys inside textbox, it will display the same message.