C#多线程编程实例 线程与窗体交互

public partial class Form1 : Form  
{  
    //声明线程数组  
    Thread[] workThreads = new Thread[10];  
  
    public Form1()  
    {  
        InitializeComponent();  
    }  
  
    //此委托允许异步的调用为Listbox添加Item  
    delegate void AddItemCallback(string text);  
  
    //这种方法演示如何在线程安全的模式下调用Windows窗体上的控件。  
    private void AddItem(string text)  
    {  
        if (this.listBox1.InvokeRequired)  
        {  
            AddItemCallback d = new AddItemCallback(AddItem);  
            this.Invoke(d, new object[] { text });  
        }  
        else  
        {  
            this.listBox1.Items.Add(text);  
        }  
    }  
  
    //数据采集方法  
    public void DataGet()  
    {  
        while (true)  
        {  
            AddItem("ok");  
            Thread.Sleep(1000);  
        }  
        //如果此方法退出了，那么这个线程也就退出了  
    }  
  
    /// <summary>  
    /// 启动线程  
    /// </summary>  
    /// <param name="sender"></param>  
    /// <param name="e"></param>  
    private void button1_Click(object sender, EventArgs e)  
    {  
        //循环创建并启动线程执行  
        for (int i = 0; i < workThreads.Length; i++)  
        {  
            if (workThreads[i] == null)  
            {  
                //如果线程不存在，则创建  
                workThreads[i] = new Thread(new ThreadStart(DataGet));  
                workThreads[i].Name = i.ToString();  
                workThreads[i].Start();  
            }  
            else  
            {  
                //已经存在，如果没有运行，则启动  
                if (workThreads[i].ThreadState == ThreadState.Aborted || workThreads[i].ThreadState == ThreadState.Stopped)  
                {  
                    workThreads[i] = new Thread(new ThreadStart(DataGet));  
                    workThreads[i].Name = i.ToString();  
                    workThreads[i].Start();  
                }else{  
                    workThreads[i].Start();  
                }  
            }  
        }  
    }  
  
    /// <summary>  
    /// 停止线程  
    /// </summary>  
    /// <param name="sender"></param>  
    /// <param name="e"></param>  
    private void button2_Click(object sender, EventArgs e)  
    {  
        //循环停止线程执行  
        for (int i = 0; i < workThreads.Length; i++)  
        {  
            //如果线程存在，并且状态不是停止也不是终止的，则终止该线程  
            if (workThreads[i] != null && workThreads[i].ThreadState != ThreadState.Stopped && workThreads[i].ThreadState != ThreadState.Aborted)  
            {  
                workThreads[i].Abort();  
            }  
        }  
    }  
}