c# 多线程编程 入门篇

C# 多线程编程入门攻略

本文主要介绍C#多线程编程的基础知识，包括如何创建和启动线程、锁定和解锁等常用操作。

创建和启动线程

在线程编程中，可以使用Thread类来创建和启动线程。创建Thread对象时需要传入一个ThreadStart委托对象，它指定了线程执行的入口点。

示例代码：

using System;
using System.Threading;

public class MyThread
{
    public void ThreadProc()
    {
        Console.WriteLine("ThreadProc is running...");
    }
}

public class Program
{
    static void Main(string[] args)
    {
        MyThread myThread = new MyThread();
        Thread thread = new Thread(myThread.ThreadProc);
        thread.Start(); // 启动线程

        Console.WriteLine("Main thread exits...");
    }
}

执行结果：

ThreadProc is running...
Main thread exits...

锁定和解锁

在多线程编程过程中，可能会遇到多个线程同时访问同一个数据资源的情况。这时候需要使用锁定和解锁机制来保证数据资源的正确性。

示例代码：

using System;
using System.Threading;

public class Counter
{
    private int count;

    public void Increment()
    {
        lock (this)
        {
            count++;
            Console.WriteLine("{0} Incremented: {1}", Thread.CurrentThread.Name, count);
        }
    }
}

public class Program
{
    static void Main(string[] args)
    {
        Counter counter = new Counter();

        Thread thread1 = new Thread(() => 
        {
            Thread.CurrentThread.Name = "Thread1";
            for (int i = 0; i < 5; i++)
            {
                counter.Increment();
            }
        });

        Thread thread2 = new Thread(() => 
        {
            Thread.CurrentThread.Name = "Thread2";
            for (int i = 0; i < 5; i++)
            {
                counter.Increment();
            }
        });

        thread1.Start();
        thread2.Start();

        thread1.Join();
        thread2.Join();

        Console.WriteLine("Main thread exits...");
    }
}

执行结果：

Thread1 Incremented: 1
Thread1 Incremented: 2
Thread2 Incremented: 3
Thread2 Incremented: 4
Thread2 Incremented: 5
Thread1 Incremented: 6
Thread1 Incremented: 7
Thread1 Incremented: 8
Thread2 Incremented: 9
Thread2 Incremented: 10
Main thread exits...

总结

本文介绍了C#多线程编程的基础知识，包括如何创建和启动线程、锁定和解锁等常用操作。在实际编程中，需要根据具体情况选择不同的线程同步机制来保证线程安全。