在需求设计中，我们会遇到通过按钮对程序正在生成的数据进行控制的情况，如：在滚动生成数据的时，通过按钮事件对其进行暂停，继续，停止等操作。有人建议通过时钟控制来实现，也有人建议通过多线程来控制实现。本文通过多线程的方法来控制实现在TextBox中追加循环生成文本时的暂停、继续、停止等处理。详细的处理过程如下，供大家参考：

一、设计工具和语言

    使用VS2010开发工具，C#语言编写的WinForm程序实现。

二、设计界面

    设计界面如下图所示：

注：界面中TextBox 的ScrollBars属性设置为Vertical，Multiline属性设置为true

三、实现程序完整代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace stoptest
{
    public partial class Form2 : Form
    {
        public enum opState
        {
            none,   //无操作
            pause,  //暂停
            go_on,  //继续
            stop    //停止
        }
        private Thread myThread = null;
        private bool myThreadRun = false;
        private opState state = opState.none;
        private delegate void ShowMsgHandler(string msg);

        public Form2()
        {
            InitializeComponent();
        }
        ///
        /// 开始
        ///
        ///
        ///
        private void btn1_Click(object sender, EventArgs e)
        {
           
            if (myThread == null || myThread.ThreadState == ThreadState.Stopped)
            {
                myThreadRun = true;
                myThread = new Thread(new ThreadStart(runPro));
                myThread.IsBackground = true;
                myThread.Start();
            }
            else
            {
                myThreadRun = false;
            }
        }

        public void runPro()
        {   
            for (int i = 0; i < 10000; i++)
            {
                //状态开关控制
                switch (state)
                {
                    case opState.pause:                         
                        i--;
                        continue;
                    case opState.go_on:
                        break;
                    case opState.none:
                        break;
                    case opState.stop:
                        return;
                }
                if (this.InvokeRequired)
                {
                    this.Invoke(new ShowMsgHandler(ShowMsg), i.ToString());
                }
                else
                {
                    ShowMsg(i.ToString());
                }
                //Thread.Sleep(100);

            }
        }
        private void ShowMsg(string msg)
        {
            this.textBox1.AppendText(msg+"\r\n");
        }
        ///
        /// 暂停
        ///
        ///
        ///
        private void btn2_Click(object sender, EventArgs e)
        {
            state = opState.pause;
        }
        ///
        /// 继续
        ///
        ///
        ///
        private void btn3_Click(object sender, EventArgs e)
        {
            state = opState.go_on;
        }
        ///
        /// 停止
        ///
        ///
        ///
        private void btn4_Click(object sender, EventArgs e)
        {
            state = opState.stop;
            myThreadRun = false;
        }
    }
}




备注：本文在参考相关网络资料的基础上总结而得。