C# 多线程示例：使用 Thread 类实现多个线程同时运行

namespace Threaddemo { public partial class MainForm : Form { private Thread thread1, thread2, thread3; private DateTime startTime;

    public MainForm()
    {
        InitializeComponent();
    }

    private void MainForm_Load(object sender, EventArgs e)
    {
        // 初始化线程
        thread1 = new Thread(new ThreadStart(Worker1));
        thread2 = new Thread(new ThreadStart(Worker2));
        thread3 = new Thread(new ThreadStart(Worker3));
    }

    private void button1_Click(object sender, EventArgs e)
    {
        // 开始运行三个线程
        startTime = DateTime.Now;
        thread1.Start();
        thread2.Start();
        thread3.Start();
    }

    private void Worker1()
    {
        // 线程1的工作
        while (DateTime.Now.Subtract(startTime).TotalSeconds < 60)
        {
            UpdateLabel(label1, DateTime.Now.Subtract(startTime).ToString('hh\:mm\:ss'));
        }
    }

    private void Worker2()
    {
        // 线程2的工作
        while (DateTime.Now.Subtract(startTime).TotalSeconds < 60)
        {
            UpdateLabel(label2, DateTime.Now.Subtract(startTime).ToString('hh\:mm\:ss'));
        }
    }


    private void Worker3()
    {
        // 线程3的工作
        while (DateTime.Now.Subtract(startTime).TotalSeconds < 60)
        {
            UpdateLabel(label3, DateTime.Now.Subtract(startTime).ToString('hh\:mm\:ss'));
        }
    }

    private void UpdateLabel(Label label, string text)
    {
        // 更新 Label 的文本
        if (label.InvokeRequired)
        {
            label.Invoke(new Action<Label, string>(UpdateLabel), label, text);
        }
        else
        {
            label.Text = text;
        }
    }
}

} namespace Threaddemo { internal static class Program { ///

/// 应用程序的主入口点。 ///

[STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new MainForm()); } } }这些代码无法运行，哪有问题呢，窗体名为Form1内容：代码中的窗体名为MainForm，而 Program 类中创建的窗体为 Form1，需要将其修改为 MainForm。修改后的代码如下：

namespace Threaddemo { internal static class Program { ///

/// 应用程序的主入口点。 ///

[STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new MainForm()); } }