. NET Task (Task)

1. Task (Tasks):

It is easy to invoke ThreadPool.QueueUserWorkItem to implement asynchronous operations, but this technique has many

. NET introduces task types to use tasks.

The following three methods are implemented asynchronously:

   Public Static void Method ()        {            = = Console.WriteLine (""))            ; // scheduling Tasks            with start () New Task (() = Console.WriteLine ("")). Start ();             // to dispatch a task            by using the Run method Task.run (() = Console.WriteLine (""));        

A. In order to create a task, you need to call the constructor and pass an Action or action<object> delegate. This delegate is the code action you want to perform.

B. If you call run, you can pass an action or fun<tresult> delegate. The two differences are that Aciton has no return value, fun has a return value

2. Wait for the task to complete and get the result:

  Public Static voidMethod2 () {//Create a tasktask<int> t =Newtask<int> (n = Sum (int) n),Ten); //Start a taskT.start (); //wait for the task to completet.wait (); //Get ResultsConsole.WriteLine ("Sum is:{0}", T.result); }        Private Static intSum (intN) {intsum =0;  for(; n >0; n--)            {                checked{Sum + =N;} }            returnsum; }

3. Cancel the task:

. NET Task (Task)