多线程(2)Thread

　　我们先从最基础的Thread说起。

创建并启动线程

创建并启动一个线程，如下代码：

 namespace ConsoleApplication17
 {
     class Program
     {
         static void Main(string[] args)
         {
             var thread = new Thread(PrintNumbers);
             thread.Start();

             Console.WriteLine("Thread Start...");
             Console.ReadKey();
         }

         /// <summary>
         /// 匹配委托的方法
         /// </summary>
         public static void PrintNumbers()
         {
             Console.WriteLine("Starting......");
             for (int i = ; i < ; i++)
             {
                 Console.WriteLine(i);
             }
         }
     }
 }

运行结果：

暂停线程

假如需要暂停当前线程，可以调用Thread.Sleep方法，使当前线程处于阻塞状态，如下代码：

 namespace ConsoleApplication17
 {
     class Program
     {
         static void Main(string[] args)
         {
             var thread = new Thread(PrintNumbersWithDelay);
             thread.Start();

             Console.WriteLine("Thread Start...");
             Console.ReadKey();
         }

         /// <summary>
         ///
         /// </summary>
         public static void PrintNumbersWithDelay()
         {
             Console.WriteLine("Starting......");
             for (int i = ; i < ; i++)
             {
                 Thread.Sleep(TimeSpan.FromMilliseconds());
                 Console.WriteLine(string.Format("{0}  {1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), i));
             }
         }
     }
 }

输出结果：

合并线程

如果需要等待某个子线程执行行，主线程才继续执行时，可以使用Thread.Join方法来实现，如下代码：

 namespace ConsoleApplication17
 {
     class Program
     {
         static void Main(string[] args)
         {
             //Thread
             var thread = new Thread(PrintNumbersWithDelay);
             thread.Start();
             thread.Join();

             Console.WriteLine("Thread Completed!");
             Console.ReadKey();
         }

         /// <summary>
         ///
         /// </summary>
         public static void PrintNumbersWithDelay()
         {
             Console.WriteLine("Starting......");
             for (int i = ; i < ; i++)
             {
                 Thread.Sleep(TimeSpan.FromMilliseconds());//线程阻塞1s，此时线程状态为WaitSleepJoin
                 Console.WriteLine(string.Format("当前时间：{0}，线程状态：{1}，结果：{2}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"),Thread.CurrentThread.ThreadState, i));
             }
         }
     }
 }

输出结果：

终止线程

如果在子线程运行过程中强制终止它，可以调用Thread.Abort方法，这会给当前子线程触发ThreadAbortException异常，导致线程被终止！

如下代码：

 namespace ConsoleApplication17
 {
     class Program
     {
         static void Main(string[] args)
         {
             Console.WriteLine("Starting Program...");
             var thread = new Thread(PrintNumbersWithDelay);
             thread.Start();

             Thread.Sleep(TimeSpan.FromMilliseconds());
             thread.Abort();

             Console.WriteLine("Thread has been abort!");
             Console.ReadKey();
         }

         /// <summary>
         ///
         /// </summary>
         public static void PrintNumbersWithDelay()
         {
             Console.WriteLine("Starting......");
             for (int i = ; i < ; i++)
             {
                 Thread.Sleep(TimeSpan.FromMilliseconds());
                 Console.WriteLine(string.Format("当前时间：{0}，线程状态：{1}，结果：{2}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), Thread.CurrentThread.ThreadState, i));
             }
         }
     }
 }

线程传递参数

通过分析可以发现，Thread接受的实际上是一个委托，包括无参数的委托和接受一个Object类型的委托，

如下代码：

 namespace ConsoleApplication17
 {
     class Program
     {
         static void Main(string[] args)
         {
             Console.WriteLine("Main thread starting...");
             var thread = new Thread(PrintNumbersWithCount);
             thread.Start();
             thread.Join();

             Console.WriteLine("Main thread completed!");
             Console.ReadKey();
         }

         /// <summary>
         /// 匹配委托方法，带参数
         /// </summary>
         public static void PrintNumbersWithCount(object obj)
         {
             Console.WriteLine("Sub thread starting...");
             var number = Convert.ToInt32(obj);
             for (int i = ; i < number; i++)
             {
                 Console.WriteLine(string.Format("当前时间：{0}，线程状态：{1}，结果：{2}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), Thread.CurrentThread.ThreadState, i));
             }
         }
     }
 }

输出结果：