C#多線程

一 線程Thread的使用

       （1）不通過委托，直接在線程里實現方法體

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
bool a =false;
bool b = false;
bool c = false;
Stopwatch watch = new Stopwatch();//測量運行時間
watch.Start();//開始計時

//線程1
Thread threadTest1 = new Thread(() =>
{
Thread.Sleep(2000);
Console.WriteLine("線程1結束消耗時間：{0}", watch.ElapsedMilliseconds);
a = true;//如果執行則返回true
});

//線程2
Thread threadTest2 = new Thread(() =>
{
Thread.Sleep(2000);
Console.WriteLine("線程2結束消耗時間：{0}", watch.ElapsedMilliseconds);
b = true;//如果執行則返回true
});

//線程3
Thread threadTest3 = new Thread(() =>
{
Thread.Sleep(2000);
Console.WriteLine("線程3結束消耗時間：{0}", watch.ElapsedMilliseconds);
c = true;//如果執行則返回true
});

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

threadTest2.Join();//等待其它線程執行結束
threadTest1.Join();
threadTest3.Join();

if (a == true && b == true && c == true)//當三個子線程全部執行完畢，則執行
{
Console.WriteLine("監控結束消耗時間：{0}", watch.ElapsedMilliseconds);
Console.Read();

}
}
}
}
     執行結果：
     

       （2）通過委托傳遞，可以帶參，也可以不帶參

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

Stopwatch watch = new Stopwatch();//測量運行時間
watch.Start();//開始計時
//通過委托傳遞，將testMethod方法委托給線程執行
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("總時間：{0}", watch.ElapsedMilliseconds);
Console.Read();

}
public static void TestMethod()
{

Console.WriteLine("不帶參數的線程函數");
}

public static void TestMethod(object data)
{
string datastr = data as string;
Console.WriteLine("帶參數的線程函數，參數為：{0}", datastr);
}
}

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   執行結果：
    

二：使用task類實現多線程

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
bool a =false;
bool b = false;
bool c = false;
Stopwatch watch = new Stopwatch();//測量運行時間
watch.Start();//開始計時

var Task1 = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
Console.WriteLine("線程1結束消耗時間：{0}", watch.ElapsedMilliseconds);
a = true;
});

var Task2 = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
Console.WriteLine("線程2結束消耗時間：{0}", watch.ElapsedMilliseconds);
b = true;
});

var Task3 = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
Console.WriteLine("線程3結束消耗時間：{0}", watch.ElapsedMilliseconds);
c = true;
});
Task.WaitAll(Task1, Task2, Task3);
if (a == true && b == true && c == true)
{
Console.WriteLine("監控結束消耗時間：{0}", watch.ElapsedMilliseconds);
Console.Read();

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

}
}
}
   執行結果：
   
   

      這三個demo只是對于剛剛接觸多線程的一個實踐，簡單易理解。

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版權聲明：本文為CSDN博主「jimmyBay」的原創文章，遵循CC 4.0 BY-SA版權協議
原文鏈接：https://blog.csdn.net/shiyiqijialimin/article/details/50664092