WinForm中實現跑馬燈的效果

 

在程序的構造函數中寫

{

            Timer HelpTime = new Timer();//實例化一個時間控件

            HelpTime.Enabled = true;//讓時間控件可用

            HelpTime.Interval = 150;//時間間隔150毫秒

            p = new PointF(this.HelpText.Size.Width, 0);

            HelpTime.Tick+=new EventHandler(HelpTime_Tick);//註冊時間控件的Tick事件

}

 public string text = "跑馬燈！csdn baihe_591,文字改變時,重新顯示,文字改變時,重新顯示,文字改變時,重新顯示,文字改變時,重新顯示!";

        PointF p;

        Font f = new Font("宋體", 10);

        Color c = Color.FromArgb(237,232,236);

        string temp;

        private void HelpTime_Tick(object sender, EventArgs e)

        {

            Graphics g = this.HelpText.CreateGraphics();

            SizeF s = new SizeF();

            s = g.MeasureString(text, f);//測量文字長度

            Brush brush = Brushes.Blue;

            g.Clear(c);//清除背景

            if (temp != text)//文字改變時,重新顯示

            {

                p = new PointF(this.HelpText.Size.Width, 0);

                temp = text;

            }

            else

                p = new PointF(p.X - 10, 0);//每次偏移10

            if (p.X <= -s.Width)

                p = new PointF(this.HelpText.Size.Width, 0);

            g.DrawString(text, f, brush, p);

        }