C#实现跑马灯效果的示例代码_C#教程

 public partial class CustomLable : Label
    {
        System.Timers.Timer timer = new System.Timers.Timer(200);
        int offset = 5;//偏移量
        PointF textPoint;
        public CustomLable()
        {
            InitializeComponent();
            textPoint = new PointF(this.Width, 0);
            timer.Elapsed += (s, e) =>
            {
                try
                {
                    if (!IsDisposed)
                    {
                        Graphics g = CreateGraphics();
                        SizeF textSize = g.MeasureString(Text, Font);
                        textPoint.X -= offset;
                        if (textPoint.X <= -textSize.Width)
                        {
                            textPoint.X = Width;
                        }
                        g.Clear(BackColor);
                        g.DrawString(Text,Font, new SolidBrush(ForeColor), textPoint);
                    }
                }
                catch { }
            };
        }

        protected override void OnPaint(PaintEventArgs pe)
        {
            base.OnPaint(pe);
        }

        private bool _IsMarquee;

        [Browsable(true)]
        [Description("是否以跑马灯效果显示")]
        public bool IsMarquee
        {
            get { return _IsMarquee; }
            set
            {
                _IsMarquee = value;
                Marquee();
            }
        }


        public void Marquee()
        {
            if (IsMarquee)
            {
                timer.Start();
            }
            else
            {
                timer.Stop();
                textPoint = new PointF(0, 0);
                try
                {
                    if (!IsDisposed)
                    {
                        Graphics g = CreateGraphics();
                        g.Clear(BackColor);
                        g.DrawString(Text, Font, new SolidBrush(ForeColor), textPoint);
                    }
                }
            }
        }
    }

 private void button1_Click(object sender, EventArgs e)
        {
            customLable1.IsMarquee = !customLable1.IsMarquee;
        }