Change TextBox background and font size : TextBox Style « Windows Presentation Foundation « C# / CSharp Tutorial

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C# / CSharp Tutorial » Windows Presentation Foundation » TextBox Style 
24.15.2.Change TextBox background and font size
using System; 
using System.Windows; 
using System.Windows.Media; 
using System.Windows.Controls; 
using System.Windows.Markup; 


public class CodeOnly : Window 
  private TextBlock textBlock;
  private TextBox textBox; 
  public CodeOnly() { 
    Initialization()
  
  private void Initialization() { 
    this.Height = 300
    this.Width = 300
    Grid grid = new Grid()
    StackPanel stackPanel = new StackPanel()
    grid.Children.Add(stackPanel)
    this.AddChild(grid)

    // Add a text block to stackPanel: 
    textBlock = new TextBlock()
    textBlock.Margin = new Thickness(5)
    textBlock.Height = 30
    textBlock.TextAlignment = TextAlignment.Center; 
    textBlock.Text = "Hello WPF!"
    stackPanel.Children.Add(textBlock)
    // Add a text box to stackPanel: 
    textBox = new TextBox()
    textBox.Margin = new Thickness(5)
    textBox.Width = 200
    textBox.TextAlignment = TextAlignment.Center; 
    textBox.TextChanged += OnTextChanged; 
    stackPanel.Children.Add(textBox)

    // Add button to stackPanel used to chnage text color: 
    Button btnColor = new Button()
    btnColor.Margin = new Thickness(5)
    btnColor.Width = 200
    btnColor.Content = "Change Text Color"
    btnColor.Click += btnChangeColor_Click; 
    stackPanel.Children.Add(btnColor)
    // Add button to stackPanel used to change text font size: 
    Button btnSize = new Button()
    btnSize.Margin = new Thickness(5)
    btnSize.Width = 200
    btnSize.Content = "Change Text Color"
    btnSize.Click += btnChangeSize_Click; 
    stackPanel.Children.Add(btnSize)
  
  private void OnTextChanged(object sender, TextChangedEventArgs e){ 
    textBlock.Text = textBox.Text; 
  
  private void btnChangeColor_Click(object sender,RoutedEventArgs e) { 
    if (textBlock.Foreground == Brushes.Black
       textBlock.Foreground = Brushes.Red; 
    else 
       textBlock.Foreground = Brushes.Black; 
  
  private void btnChangeSize_Click(object sender,RoutedEventArgs e
  
    if (textBlock.FontSize == 11
       textBlock.FontSize = 24
    else 
       textBlock.FontSize = 11
  
}
24.15.TextBox Style
24.15.1.Reuse Style for TextBoxReuse Style for TextBox
24.15.2.Change TextBox background and font size
24.15.3.Set VerticalScrollBarVisibility for TextBox
24.15.4.Change TextBox Margin
24.15.5.Add TextBox to default docking space
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