重写OnPaint事件对窗体重绘 实例1

  public class WindowOne:Form

    {

        public WindowOne()

        {

            InitializeCompnent();

        }

        public void InitializeCompnent()

        {

            this.Width = 200;

            this.Height = 200;

        }

        //冲毁window 方法

        private void ReDraw(Graphics g)

        {

            Random ran = new Random();



            //Color ranColor = Color.FromArgb(ran.Next(256), ran.Next(256)

            //    , ran.Next(256), ran.Next(256));



            Color ranColor = Color.FromArgb(100, ran.Next(256)

                , ran.Next(256), ran.Next(256));

            g.Clear(ranColor);

        }

        /// <summary>

        /// 窗体绘制 事件

        /// </summary>

        /// <param name="e"></param>

        protected override void OnPaint(PaintEventArgs e)

        {

            //base.OnPaint(e);

            ReDraw(e.Graphics);

        }

        /// <summary>

        /// 窗体大小 重置

        /// </summary>

        /// <param name="e"></param>

        protected override void OnResize(EventArgs e)

        {

            //强制重新绘制

            this.Invalidate();

        }



    }

显示结果：