谈谈C#中各种线程的使用及注意项~

static void Main(string[] args)
{
    Thread.CurrentThread.Name = "It‘s Main Thread";
    Console.WriteLine(Thread.CurrentThread.Name + " [Status:" + Thread.CurrentThread.ThreadState + "]");
}

static void Main(string[] args)
{
    Console.WriteLine("Thread Start/Stop/Join Sample：");
    
    // 创建一个线程，使之执行 Beta 方法 
    Thread oThread = new Thread(Beta);
 
    // 实际上，Start 方法只是通知 CPU 此线程可以被执行，但具体执行时机则由 CPU 自行决定。
    oThread.Start();
    while (!oThread.IsAlive)
    {
        Thread.Sleep(1);
    }
 
    oThread.Abort();
    oThread.Join();
    Console.WriteLine();
    Console.WriteLine("Beta has finished");
    try
    {
        Console.WriteLine("Try to restart the Alpha.Beta thread");
        oThread.Start();
    }
    catch (ThreadStateException)
    {
        Console.WriteLine("ThreadStateException trying to restart Alpha.Beta. ");
        Console.WriteLine("Expected since aborted threads cannot be restarted.");
        Console.ReadLine();
    }
}
 
public static void Beta()
{
    while (true)
    {
        Console.WriteLine("Beta is running in its own thread.");
    }
}

static void Main(string[] args)
{
    Thread t1 = new Thread(() =>
    {
        System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();
        watch.Start();
        for (int i = 0; i 20000; i++)
        {
            // 模拟耗时工作
            var obj = new { name = "XXX", age = 37 };
            GC.Collect();
        }
        watch.Stop();
        Console.WriteLine("t1 finished[ {0} ]", watch.ElapsedMilliseconds);
    });
 
    Thread t2 = new Thread(() =>
    {
        System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();
        watch.Start();
        for (int i = 0; i 20000; i++)
        {
            var obj = new { name = "XXX", age = 37 };
            GC.Collect();
        }
        watch.Stop();
        Console.WriteLine("t2 finished[ {0} ]", watch.ElapsedMilliseconds);
    });
    t1.Priority = ThreadPriority.AboveNormal;
    t2.Priority = ThreadPriority.BelowNormal;
    t1.Start();
    t2.Start();
}

void DoSomething()
{
    for (int i = 0; i 900000000; i++)
    {
 
    }
    MessageBox.Show("It‘s finished.");
}
 
void ShowStr(object obj)
{
    var list = obj as Liststring>;
    if (list != null)
    {
        foreach (var item in list)
        {
            MessageBox.Show(item.ToString());
        }                
    }
    else
        MessageBox.Show("null");
}
 
// UI 单线程，运行时窗体会卡死一段时间
private void btnUI_Click(object sender, EventArgs e)
{
    DoSomething();
}
 
// 调用无參函数，此时窗体能响应用户
private void btnThreadA_Click(object sender, EventArgs e)
{
    Thread thread = new Thread(DoSomething);
    thread.Start();
}
 
// 当所有前台线程都关闭时，后台线程将立即结束运行，无条件的关闭
// 而前台线程运行时，即使关闭 Form 主程序，该线程仍将继续运行，直到计算完毕
private void btnThreadB_Click(object sender, EventArgs e)
{
    Thread thread = new Thread(DoSomething);
    thread.IsBackground = true;
    thread.Start();
}
 
// 调用有参函数
private void btnThreadC_Click(object sender, EventArgs e)
{
    Thread thread = new Thread(ShowStr);
    thread.Start(new Liststring> { "Jacky", "Skysoot", "Sam" });
}

// 可定义各类型委托 示例暂定一个
public delegate void Do(object obj);
 
public class Worker
{
    Do method;
    object obj;
 
    private void Work()
    {
        method(obj);
    }
 
    // 创建工人线程时 new 出工人实例 并在线程上指定 Work()
    public static Thread CreateWorkerThread(Do method, object obj)
    {
        Worker worker = new Worker();
        worker.method = method;
        worker.obj = obj;
        Thread t = new Thread(worker.Work);
        return t;
    }
}
 
// 任务类
public class Quest
{
    public static void Quest1(object obj)
    {
        Console.WriteLine("工人开始：" + obj.ToString() + "\r\n");
    }
 
    public static void Quest2(object obj)
    {
        string[] list = obj as string[];
        if (obj != null)
        {
            foreach (var item in list)
            {
                Console.WriteLine("工人开始：" + item);
            }
        }
    }
}
 
public class Test
{
    public static void Main(string[] args)
    {
        Thread t1 = Worker.CreateWorkerThread(Quest.Quest1, "搬砖");
        t1.Start();
        Thread t2 = Worker.CreateWorkerThread(Quest.Quest2, new string[] {"听音乐", "加班", "打台球" });
        t2.Start();
    }
}

 #region System.Windows.Forms.Timer   
    public partial class Form1 : Form
    {
        public Form1()
        {
         InitializeComponent();
        }
        int num = 0;
        private void Form_Timer_Tick(object sender, EventArgs e)
        {
            label1.Text = (++num).ToString();
            Thread.Sleep(3000);
        }
        private void button1_Click(object sender, EventArgs e)
        {
            Form_Timer.Start();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            Form_Timer.Stop();
        }
    }
    #endregion

this.Form_Timer.Tick += new System.EventHandler(this.Form_Timer_Tick);  

#region System.Windows.Forms.Timer   
    public partial class Form1 : Form
    {
        public Form1() {
            InitializeComponent();
        }
        int num = 0;
        DateTime time1 = new DateTime();
        DateTime time2 = new DateTime();
        //定义Timer   
        System.Timers.Timer Timers_Timer = new System.Timers.Timer();
        private void button1_Click(object sender, EventArgs e)
        {
            //手动设置Timer，开始执行   
            Timers_Timer.Interval = 20;
            Timers_Timer.Enabled = true;
            Timers_Timer.Elapsed += new System.Timers.ElapsedEventHandler(Timers_Timer_Elapsed);
            time1 = DateTime.Now;
        }
        void Timers_Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            label1.Text = Convert.ToString((++num)); //显示到lable   
            Thread.Sleep(3000);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            //停止执行   
            Timers_Timer.Enabled = false;
            time2 = DateTime.Now;
            MessageBox.Show(Convert.ToString(time2 - time1));
        }
    }
    #endregion

#region System.Windows.Forms.Timer   
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        int num = 0;
        DateTime time1 = new DateTime();
        DateTime time2 = new DateTime();
        System.Threading.Timer Thread_Time;
        private void button1_Click(object sender, EventArgs e)
        {
            //启动   
            Thread_Time = new System.Threading.Timer(Thread_Timer_Method, null, 0, 20);
            time1 = DateTime.Now;
        }
        void Thread_Timer_Method(object o)
        {
            label1.Text = Convert.ToString((++num));
            System.Threading.Thread.Sleep(3000);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            //停止   
            Thread_Time.Dispose();
            time2 = DateTime.Now;
            MessageBox.Show(Convert.ToString(time2 - time1));
        }
    }
    #endregion

 static void Main()
    {
        Timer t = new Timer(Test, null, 0, 1000);
        Console.ReadLine();
    }
    public static void Test(object o)
    {
        Console.WriteLine("hello world");
        GC.Collect();
    }