C# -- 使用线程池 ThreadPool 执行多线程任务

发布时间：2020-12-15 04:45:18 所属栏目：百科来源：网络整理

导读：C# -- 使用线程池 ThreadPool 执行多线程任务 1. 使用线程池 Main( = s => = result = SumNumbers( = s => = s => ThreadPool.QueueUserWorkItem(wc1); ThreadPool.QueueUserWorkItem(wc2); ThreadPool.QueueUserWorkItem(wc3); Console.ReadKey(); } /spans

1. 使用线程池

Main(= s =>= result = SumNumbers(= s =>= s =>

        ThreadPool.QueueUserWorkItem(wc1);
        ThreadPool.QueueUserWorkItem(wc2);
        ThreadPool.QueueUserWorkItem(wc3);

        Console.ReadKey();
    }

    </span><span style="color: #0000ff"&gt;static</span> <span style="color: #0000ff"&gt;long</span> SumNumbers(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; count)
    {
        </span><span style="color: #0000ff"&gt;long</span> sum = <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;;
        </span><span style="color: #0000ff"&gt;for</span> (<span style="color: #0000ff"&gt;int</span> i = <span style="color: #800080"&gt;0</span>; i < count; i++<span style="color: #000000"&gt;)
        {
            sum </span>+=<span style="color: #000000"&gt; i;
        }
        Thread.Sleep(</span><span style="color: #800080"&gt;1000</span><span style="color: #000000"&gt;);
        </span><span style="color: #0000ff"&gt;return</span><span style="color: #000000"&gt; sum;
    }
}</span></pre>

执行结果：

2. 等待线程池的线程执行

Main( (ManualResetEvent m1 = ManualResetEvent( (ManualResetEvent m2 = ManualResetEvent( (ManualResetEvent m3 = ManualResetEvent(=>= result = SumNumbers(

            ThreadPool.QueueUserWorkItem(
                s </span>=><span style="color: #000000"&gt;{
                    Console.WriteLine(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;线程ID:{0},Thread.CurrentThread.ManagedThreadId);
                    Stopwatch stw </span>= <span style="color: #0000ff"&gt;new</span><span style="color: #000000"&gt; Stopwatch();
                    stw.Start();
                    </span><span style="color: #0000ff"&gt;long</span> result = SumNumbers(<span style="color: #800080"&gt;10000000</span><span style="color: #000000"&gt;);
                    stw.Stop();
                    m2.Set();
                    Console.WriteLine(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;线程ID:{0},stw.ElapsedMilliseconds);
                });
            ThreadPool.QueueUserWorkItem(
                s </span>=><span style="color: #000000"&gt;{
                    Console.WriteLine(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;线程ID:{0},Thread.CurrentThread.ManagedThreadId);
                    Stopwatch stw </span>= <span style="color: #0000ff"&gt;new</span><span style="color: #000000"&gt; Stopwatch();
                    stw.Start();
                    </span><span style="color: #0000ff"&gt;long</span> result = SumNumbers(<span style="color: #800080"&gt;10000000</span><span style="color: #000000"&gt;);
                    stw.Stop();
                    m3.Set();
                    Console.WriteLine(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;线程ID:{0},stw.ElapsedMilliseconds);
                });

            </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;等待线程池的线程执行</span>

m1.WaitOne();
m2.WaitOne();
m3.WaitOne();
Console.WriteLine("所有线程执行完成");

        }

        Console.ReadKey();
    }

    </span><span style="color: #0000ff"&gt;static</span> <span style="color: #0000ff"&gt;long</span> SumNumbers(<span style="color: #0000ff"&gt;int</span><span style="color: #000000"&gt; count)
    {
        </span><span style="color: #0000ff"&gt;long</span> sum = <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;;
        </span><span style="color: #0000ff"&gt;for</span> (<span style="color: #0000ff"&gt;int</span> i = <span style="color: #800080"&gt;0</span>; i < count; i++<span style="color: #000000"&gt;)
        {
            sum </span>+=<span style="color: #000000"&gt; i;
        }
        Thread.Sleep(</span><span style="color: #800080"&gt;3000</span><span style="color: #000000"&gt;);
        </span><span style="color: #0000ff"&gt;return</span><span style="color: #000000"&gt; sum;
    }
}</span></pre>

执行结果:

（编辑：李大同）

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