C# 跑马灯效果

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using Timer = System.Timers.Timer;

namespace WindowsFormsApp1.Frm
{
    /// <summary>
    /// 跑马灯
    /// </summary>
    public partial class RunHorse : Form
    {
        private static Timer timer = new Timer();
        public RunHourse()
        {
            InitializeComponent();
            timer.Interval = 50;
        }

        private void RunHorse_Load(object sender, EventArgs e)
        {
            timer.Elapsed += Timer_Elapsed;
            //初始化lbl位置
            {
                var pWidth = this.panel1.Width;
                this.label1.Left = pWidth;
                this.label2.Left = pWidth;
            }

            //初始化lbl位置
            {
                var pWidth = this.panel2.Width;
                this.label3.Left = pWidth;
                this.label4.Left = pWidth;
            }
            timer.Start();
        }

        private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            try
            {
                timer.Stop();

                //循环跑
                this.panel1.InvokeOnUiThreadIfRequired(() =>
                {
                    var pWidth = this.panel1.Width; ;

                    //lbl2准备好了，且lbl1还没跑完
                    if (this.label2.Left == this.panel1.Width
                    && this.label1.Right > 0) this.label1.Left -= 10;
                    else this.label1.Left = pWidth;

                    //lbl1准备好了，且lbl2还没跑完
                    if (this.label1.Left == this.panel1.Width
                    && this.label2.Right > 0) this.label2.Left -= 10;
                    else this.label2.Left = pWidth;

                });

                //即将结束时开始下一个
                this.panel2.InvokeOnUiThreadIfRequired(() =>
                {
                    var pWidth = this.panel2.Width;

                    if (this.label3.Right < 0) this.label3.Left = pWidth;
                    if (this.label4.Right < 0) this.label4.Left = pWidth;

                    //lbl1即将消失，且 lbl2准备好了
                    if (this.label3.Right < 80 && this.label4.Right > 0)
                    {
                        this.label3.Left -= 10;
                        this.label4.Left -= 10;
                    }

                    //lbl2即将消失，且 lbl1准备好了
                    if (this.label4.Right < 80 && this.label3.Right > 0)
                    {
                        this.label3.Left -= 10;
                        this.label4.Left -= 10;
                    }

                    //lbl2准备好了，且lbl1还没跑完
                    if (this.label4.Left == pWidth
                    && this.label3.Right > 0) this.label3.Left -= 10;

                    //lbl1准备好了，且lbl2还没跑完
                    if (this.label3.Left == pWidth
                    && this.label4.Right > 0) this.label4.Left -= 10;
                });
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex + "");
            }
            finally
            {
                timer.Start();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.label1.Text = "0123456789";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.label2.Text = "ABCDEFGHIJK";
        }
    }
}