Handler for the PreviewKeyDown event on the TextBox : TextBox « Windows Presentation Foundation « C# / C Sharp

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C# / C Sharp » Windows Presentation Foundation » TextBox Screenshots  Handler for the PreviewKeyDown event on the TextBox    <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;             }         }     } }             Related examples in the same category 1. TextBox Style 2. Bind TextBlock to TextBox 3. TextBox focus listener 4. TextBox with custom ErrorTemplate and ToolTip 5. TextBox uses the ExceptionValidationRule and UpdateSourceExceptionFilter handler 6. TextBox with UpdateSourceExceptionFilter handler 7. TextBox with default ErrorTemplate 8. TextBox MouseLeftButtonDown action and PreviewMouseLeftButtonDown action 9. Assign your own class to DataContent and bind to TextBox 10. Listen to TextBox text changed event 11. TextBox: set text, select all, clear, prepend, insert, append, cut, paste, undo 12. Set TextBox to editable 13. TextBox text changed event 14. TextBox PreviewKeyDown 15. TextBox KeyDown 16. TextBox PreviewKeyUp 17. TextBox KeyUp 18. TextBox TextInput 19. TextBox PreviewTextInput 20. Scroll TextBox 21. TextBox TextChanged event 22. Use Dictionary to record which textbox has been changed and not saved 23. Set TextBox ContextMenu to null 24. TextBox Selection start, end and selected text 25. Scrollable TextBox Column 26. TextBox PreviewKeyDown, PreviewKeyUp, PreviewTextInput, KeyDown, KeyUp and TextChanged events 27. Check Spelling Error