clock.cs

《c#技术内幕代码》

namespace Ch9_7
{
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Drawing;
    using System.Data;
    using System.Windows.Forms;
	using System.Globalization;
	using System.Timers;

    /// <summary>
    ///    Summary description for Clock.
    /// </summary>
    /// 
    public class Clock : System.Windows.Forms.Control
    {
		private System.Timers.Timer aTimer;
		private void InitializeComponent ()
		{
		}
	
        public Clock()
        {
           aTimer = new System.Timers.Timer();
           aTimer.Tick+=new EventHandler(OnTimedEvent);
           // Set the Interval to 1 second.
           aTimer.Interval=100;
           aTimer.Enabled=true;
			
        }

        public void OnTimedEvent(object source, EventArgs e)
		{
			Invalidate();
		}
    
        protected override void OnPaint(PaintEventArgs pe)
        {
			// Get the current time
			DateTime dt = DateTime.Now;

			// Format it as a string
			string t = dt.ToShortTimeString();

			// And display it
			StringFormat style = new StringFormat();
			style.Alignment = StringAlignment.Center;
			pe.Graphics.DrawString(t, Font, new SolidBrush (ForeColor), ClientRectangle, style);
         }
    }
}