label 飘动效果，如何实现到边自动往反向走

Question

想请教各位几个问题，这个程序是你点击它，label默认向左走，到了窗体边时候，自动往回走，到那个边自动往回走，一直这样。另一个按钮是设置它到底向哪个方向走如何让它碰到窗体就往回走，我写时候，它只定在窗体边，没反应啦
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;namespace 随机数产生
{
   
    public partial class Form1 : Form
    {         
        delegate void dfun(string text);
        dfun dfun1;
        private Thread thread;
        int i;
        
        public Form1()
        {
            dfun1 = new dfun(settext);
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            if (button1.Text == "开始")
            {
                thread = new Thread(new ThreadStart(fun));
                //label1.Text = "0";
                thread.Start();
                button1.Text = "暂停";
            }
            else {
                if (thread.IsAlive) { thread.Abort();
                button1.Text = "开始";
            }
            }        }
        public void fun() {
            while (true)
            {
                int x = Convert.ToInt32(label1.Text);
                string s = Convert.ToString(x);
                label1.Invoke(dfun1, new object[] { s });
                Thread.Sleep(100);
                
            }
        }
        private  void settext(string text)
        {
               label1.Left -= 3;
               i = label1.Left;
               if (i<0)
              // if (label1.Left < 0 && label1.Right >this.Width)     
               {
                  label1.Left += 3;    
                  i=label1.Left; 
     }
               if (i > this.Width - 1) 
               {
                   label1.Left -= 3;
                   i = label1.Left;
               }
                   string temp = "";
             int j;
             j = label1.Right;
             temp += j.ToString() + "\n";            
             label3.Text = temp; //显示在label1中*/
          
             Random ran = new Random();              int   arr1 = ran.Next(0, 9);             string temp1 = "";             temp1 += arr1.ToString() + "\n";
             label1.Text = temp1; //显示在label1中*/
        }
              private void button2_Click(object sender, EventArgs e)
        {
            Form2 form2 = new Form2();
            form2.ShowDialog();
        }    }}
 

Answer 1

你线程中的循环？
用个Timer就完了，搞这么复杂。TIP：中文的命名空间最好改掉这个坏习惯

Answer 2

边界检测.if(label1.left+label1.width>form1.width) //反向操作

Answer 3

int pos= 0;
        bool b= true;
        private void timer1_Tick(object sender, EventArgs e)
        {
            this.label1.Location = new Point(pos,this.label1.Location.Y);
            if (pos== this.Width-this.label1.Size.Width)
                b= false;
            if(pos==0)
                b= true;
            if (p)
                pos++;
            else
                pos--;
        }
http://topic.csdn.net/u/20090606/10/5fc58b85-d448-4449-a46e-feb3fd9b0bcc.html

Answer 4

        private decimal V = 1;  //小球移动速度
        private decimal X1 = 0;  //当前小球X轴位置
        private decimal Y1 = 0;  //当前小球Y轴未知
        private bool XPositive = true;  //小球改变X轴方向标志
        private bool YPositive = true;  //小球改变Y轴方向标志        //窗体初始化
        private void BallForm_Load(object sender, EventArgs e)
        {
            this.timer1.Tag = false;
            this.button_ball.Location = new Point(0, 0);
        }        //X轴方向步进
        private decimal DeltaX()
        {
            if (this.XPositive)
            {
                return this.V;
            }
            else
            {
                return 0 - this.V;
            }
        }        //Y轴方向步进
        private decimal DeltaY()
        {
            if (this.YPositive)
            {
                return this.V;
            }
            else
            {
                return 0 - this.V;
            }
        }        //设置X轴换向
        private void SetXPositive()
        {
            if (this.X1 < 0 || this.X1+this.button_ball.Width > this.ClientSize.Width)
            {
                this.XPositive = !this.XPositive;
            }
        }        //设置Y轴换向
        private void SetYPositive()
        {
            if(this.Y1<0 || this.Y1+this.button_ball.Height>this.ClientSize.Height)
            {
                this.YPositive=!this.YPositive;
            }
        }        private int X()
        {
            this.X1= X1 + DeltaX();
            return (int)this.X1;
        }        private int Y()
        {
            this.Y1= Y1 + DeltaY();
            return (int)this.Y1;
        }        //设置速度
        private void button_submit_Click(object sender, EventArgs e)
        {
            decimal.TryParse(this.textBox_speed.Text, out this.V);
        }        //Timer控件运行
        private void timer1_Tick(object sender, EventArgs e)
        {
            this.SetXPositive();
            this.SetYPositive();
            this.button_ball.Location = new Point(this.X(), this.Y());
        }        //开始按钮
        private void button_start_Click(object sender, EventArgs e)
        {
            bool running = false;
            if (bool.TryParse(this.timer1.Tag.ToString(), out running))
            {
                if (running)
                {
                    this.timer1.Stop();
                    this.button_start.Text = "运行";
                }
                else
                {
                    this.timer1.Start();
                    this.button_start.Text = "停止";
                }
                running = !running;
                this.timer1.Tag = running;
            }
        }