c# Thread多线程几种方式例子

深藏阁楼爱情的钟 2022-12-11 09:28 130阅读 0赞

**进程作为操作系统执行程序的基本单位，拥有应用程序的资源，进程包含线程，进程的资源被线程共享，线程不拥有资源。**

**程序关闭时，后台线程直接关闭，但前台线程会执行完后关闭。  
通过Thread类新建线程默认为前台线程。其他方式创建的都是后台线程**

**1.异步多线程**

public class Program
        { 
            static void Main(string[] args)
            { 
                Console.WriteLine("----------主程序开始，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
                for (int i = 0; i < 5; i++)
                { 
                    Action<string> action = t =>
                    { 
                        for (int k = 0; k < 1000000000; k++)
                        {  }
                        Console.WriteLine("当前参数是{0},当前线程是{1}", t, Thread.CurrentThread.ManagedThreadId);
                    };
    
                    action.BeginInvoke("参数是" + i, null, null);
                }
                Console.WriteLine("----------主程序结束，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
                Console.Read();
            }
    
        }

**运行效果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MTkyNTcx_size_16_color_FFFFFF_t_70_pic_center]  
**2.Threads线程**

public class Program
        { 
            static void Main(string[] args)
            { 
                Console.WriteLine("----------主程序开始，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
                for (int i = 0; i < 5; i++)
                { 
                    ParameterizedThreadStart threadStart = t =>
                    { 
                        for (int k = 0; k < 1000000000; k++)
                        {  }
                        Console.WriteLine("当前参数是{0},当前线程是{1}", t, Thread.CurrentThread.ManagedThreadId);
                    };
    
                    Thread thread = new Thread(threadStart);
    
                    thread.Start(i);
                }
                Console.WriteLine("----------主程序结束，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
    
                Console.Read();
            }
        }

**运行效果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MTkyNTcx_size_16_color_FFFFFF_t_70_pic_center 1]  
**3.ThreadPool线程池**

public class Program
        { 
            static void Main(string[] args)
            { 
                Console.WriteLine("----------主程序开始，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
                for (int i = 0; i < 5; i++)
                { 
                    WaitCallback waitCallback = t =>
                    { 
                        for (int k = 0; k < 1000000000; k++)
                        {  }
                        Console.WriteLine("当前参数是{0},当前线程是{1}", t, Thread.CurrentThread.ManagedThreadId);
                    };
    
                    ThreadPool.QueueUserWorkItem(waitCallback, i);
                }
                Console.WriteLine("----------主程序结束，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
    
                Console.Read();
            }
        }

**运行效果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MTkyNTcx_size_16_color_FFFFFF_t_70_pic_center 2]  
**4.Task**

public class Program
        { 
            static void Main(string[] args)
            { 
                Console.WriteLine("----------主程序开始，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
    
                TaskFactory taskFactory = new TaskFactory();
    
                for (int i = 0; i < 5; i++)
                { 
                    Action<object> action = t =>
                    { 
                        for (int k = 0; k < 1000000000; k++)
                        {  }
                        Console.WriteLine("当前参数是{0},当前线程是{1}", t, Thread.CurrentThread.ManagedThreadId);
                    };
    
                    taskFactory.StartNew(action, i);
                }
                Console.WriteLine("----------主程序结束，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
    
                Console.Read();
            }
        }

**运行效果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MTkyNTcx_size_16_color_FFFFFF_t_70_pic_center 3]  
**5.Parallel**

public class Program
        { 
            static void Main(string[] args)
            { 
                Console.WriteLine("----------主程序开始，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
    
    
                Action action1 = () =>
                { 
                    for (int k = 0; k < 1000000000; k++)
                    {  }
                    Console.WriteLine("当前参数是1,当前线程是{0}", Thread.CurrentThread.ManagedThreadId);
                };
                Action action2 = () =>
                { 
                    for (int k = 0; k < 1000000000; k++)
                    {  }
                    Console.WriteLine("当前参数是2,当前线程是{0}", Thread.CurrentThread.ManagedThreadId);
                };
                Action action3 = () =>
                { 
                    for (int k = 0; k < 1000000000; k++)
                    {  }
                    Console.WriteLine("当前参数是3,当前线程是{0}", Thread.CurrentThread.ManagedThreadId);
                };
    
                Parallel.Invoke(action1, action2, action3);
    
                Console.WriteLine("----------主程序结束，线程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);
    
                Console.Read();
            }
        }

**运行效果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MTkyNTcx_size_16_color_FFFFFF_t_70_pic_center 4]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MTkyNTcx_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/27df243259e04bf49b4fea44203d7693.png
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