Form.OnKeyPress : Form « System.Windows.Forms « C# / C Sharp by API

1. C# / C Sharp by API
2. System.Windows.Forms
3. Form

Form.OnKeyPress

   


using System.Drawing;
using System;

using System.Windows.Forms;

public class TryKey : Form {
  private char theKey = 'd'; 

  public TryKey() {
    Size = new Size(300,200);
    BackColor = Color.White;
  }
  protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;                                                                  
    g.DrawString(theKey.ToString(), new Font("Arial", 36, FontStyle.Bold), Brushes.Red, 100, 50);
    base.OnPaint(e); 
  }
  protected override void OnKeyDown(KeyEventArgs e){
    if (e.Control){
       Console.WriteLine("Control");
    }
    if (e.KeyCode == Keys.Right){
       Console.WriteLine("Right");
    }
    else if (e.KeyCode == Keys.Left){
       Console.WriteLine("Left");
    }
    Invalidate(); 
    base.OnKeyDown(e);  
  }
  protected override void OnKeyUp(KeyEventArgs e) { 
    Console.WriteLine("Key Up");
    base.OnKeyUp(e);
  }
  protected override void OnKeyPress(KeyPressEventArgs e) {
    if (char.IsLetterOrDigit(e.KeyChar)){
      theKey = e.KeyChar;
    }  
    Invalidate(); 
    base.OnKeyPress(e);
  }
  public static void Main() {
    Application.Run(new TryKey());
  }
}

    
  

   
    
    
  

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