C # basics: the icon on the thread Example 1 - Mobile Form

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            // 使线程可以调用窗体控件
            CheckForIllegalCrossThreadCalls = false;
            pos_x = this.pBoxTest.Location.X;
        }

        // 定义图像初始横坐标位置
        private int pos_x ;

        public void Roll()
        {
            bool flag = true;
            int original_pos = pos_x;
            int step = 10; // 每次移动的步长
            while (pos_x < this.Size.Width - pBoxTest.Width)
            {
                // 将图标的横坐标用变量pos_x表示
                pBoxTest.Location = new Point(pos_x, pBoxTest.Location.Y);
                // 线程休眠ms
                Thread.Sleep(50);
                if (flag)
                {
                    pos_x += step;
                }
                else
                {
                    pos_x -= step;
                    if (pos_x < original_pos)
                    {
                        flag = true;
                    }
                }
                // 当达到最右边时， 使其向相反方向移动
                if (pos_x > this.Size.Width - pBoxTest.Width - step)
                {
                    flag = false;
                    pos_x -= 10;
                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // 创建线程对象
            Thread th = new Thread(new ThreadStart(Roll));   // 不使用线程的话，会不显示界面，一直在后台运行Roll函数
            // 启动线程
            th.Start();
        }
    }
}

Output: