c#關於Task類處理多線程的學習

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

1.定義一個線程

var task1 = Task.Factory.StartNew(() => DoSomeWork())；

方法如下：

View Code

        private static object DoSomeWork()
        {
            Console.WriteLine("nihao ");
            System.Threading.Thread.Sleep(3000);
            Console.Write("nihao ");
return "xiexie";
        }

2.多線程執行后，執行另一個方法

var task1 = Task.Factory.StartNew(() => DoSomeWork()).ContinueWith(
task => { Console.WriteLine(task.Result.ToString()); }).ContinueWith(
task => { Console.WriteLine(task.Result.ToString()); });

3.等待所有線程結束

var task1 = Task.Factory.StartNew(() => DoSomeWork());
var task2 = Task.Factory.StartNew(() => DoSomeWork());
var task3 = Task.Factory.StartNew(() => DoSomeWork());

Task.WaitAll(task1, task2, task3);

4.等待其中一個線程結束

var task1 = Task.Factory.StartNew(() => DoSomeWork());
var task2 = Task.Factory.StartNew(() => DoSomeWork());
var task3 = Task.Factory.StartNew(() => DoSomeWork());
Task.WaitAny(task1, task2, task3);

5.等待所有線程結束執行的方法

var task1 = Task.Factory.StartNew(() =>
{

    Thread.Sleep(3000);

    return "dummy value 1";
});
 
var task2 = Task.Factory.StartNew(() =>
{

    Thread.Sleep(3000);

    return "dummy value 2";
});
 
var task3 = Task.Factory.StartNew(() =>
{

    Thread.Sleep(3000);

    return "dummy value 3";
});
 

Task.Factory.ContinueWhenAll(new[] { task1, task2, task3 }, tasks =>
{

    foreach (Task<string> task in tasks)

    {

        Console.WriteLine(task.Result);

    }