C#多线程

一 线程Thread的使用

       （1）不通过委托，直接在线程里实现方法体

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
bool a =false;
bool b = false;
bool c = false;
Stopwatch watch = new Stopwatch();//测量运行时间
watch.Start();//开始计时

//线程1
Thread threadTest1 = new Thread(() =>
{
Thread.Sleep(2000);
Console.WriteLine("线程1结束消耗时间：{0}", watch.ElapsedMilliseconds);
a = true;//如果执行则返回true
});

//线程2
Thread threadTest2 = new Thread(() =>
{
Thread.Sleep(2000);
Console.WriteLine("线程2结束消耗时间：{0}", watch.ElapsedMilliseconds);
b = true;//如果执行则返回true
});

//线程3
Thread threadTest3 = new Thread(() =>
{
Thread.Sleep(2000);
Console.WriteLine("线程3结束消耗时间：{0}", watch.ElapsedMilliseconds);
c = true;//如果执行则返回true
});

threadTest1.Start();
threadTest2.Start();
threadTest3.Start();

threadTest2.Join();//等待其它线程执行结束
threadTest1.Join();
threadTest3.Join();

if (a == true && b == true && c == true)//当三个子线程全部执行完毕，则执行
{
Console.WriteLine("监控结束消耗时间：{0}", watch.ElapsedMilliseconds);
Console.Read();

}
}
}
}
     执行结果：
     

       （2）通过委托传递，可以带参，也可以不带参

class Program
{
static void Main(string[] args)
{

Stopwatch watch = new Stopwatch();//测量运行时间
watch.Start();//开始计时
//通过委托传递，将testMethod方法委托给线程执行
Thread t1 = new Thread(new ThreadStart(TestMethod));
Thread t2 = new Thread(new ParameterizedThreadStart(TestMethod));
t1.Start();
t2.Start("hello");
t1.Join();
t2.Join();

Console.WriteLine("总时间：{0}", watch.ElapsedMilliseconds);
Console.Read();

}
public static void TestMethod()
{

Console.WriteLine("不带参数的线程函数");
}

public static void TestMethod(object data)
{
string datastr = data as string;
Console.WriteLine("带参数的线程函数，参数为：{0}", datastr);
}
}

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   执行结果：
    

二：使用task类实现多线程

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
bool a =false;
bool b = false;
bool c = false;
Stopwatch watch = new Stopwatch();//测量运行时间
watch.Start();//开始计时

var Task1 = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
Console.WriteLine("线程1结束消耗时间：{0}", watch.ElapsedMilliseconds);
a = true;
});

var Task2 = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
Console.WriteLine("线程2结束消耗时间：{0}", watch.ElapsedMilliseconds);
b = true;
});

var Task3 = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
Console.WriteLine("线程3结束消耗时间：{0}", watch.ElapsedMilliseconds);
c = true;
});
Task.WaitAll(Task1, Task2, Task3);
if (a == true && b == true && c == true)
{
Console.WriteLine("监控结束消耗时间：{0}", watch.ElapsedMilliseconds);
Console.Read();

}
else
{
//Thread.Sleep(1);
Console.Read();
}

}
}
}
   执行结果：
   
   

      这三个demo只是对于刚刚接触多线程的一个实践，简单易理解。

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版权声明：本文为CSDN博主「jimmyBay」的原创文章，遵循CC 4.0 BY-SA版权协议
原文链接：https://blog.csdn.net/shiyiqijialimin/article/details/50664092