C # Task Parallel library using subtotal Z

1. Simple creation using

Using System;

Using System.Diagnostics;

Using System.Threading;

Using System.Threading.Tasks;

Namespace ConsoleApplication17

{

    Class Program

    {

        void Main (string[] args)

        {

            Try

            {

                /*

                 *  

                 * For performance reasons,  the StartNew method of TaskFactory should be the preferred mechanism for creating and scheduling compute tasks, but for scenarios where creation and scheduling must be separate,

                 *  You can use the constructor, and then you can use the Start method of the task to schedule the task to execute later.

                 *  for operations that return values, the Task<tresult> class should be used. ———— MSDN

                 */

                New Task (() = {Console.WriteLine ("My frist Task.");});

                _task. Start ();

                Task _taskfactory = Task.Factory.StartNew (() = {Console.WriteLine ("My frist Task by Factory.") ;

            }

            catch (Exception ex)

            {

                Console.WriteLine (String. Format ("Exception message:{0}", ex. Message.trim ())); 

            }

            Finally

            {

                Console.ReadLine ();

            }

        }

    }

}

Code effects

2.Task Processing return value

Using System;

Using System.Diagnostics;

Using System.Threading;

Using System.Threading.Tasks;

Namespace ConsoleApplication17

{

    Class Program

    {

        void Main (string[] args)

        {

            Try

            {

                task<string> _task = task<string>. Factory.startnew (() = 

                {

                    String _guid = System.Guid.NewGuid (). ToString ();

                    Console.WriteLine (String. Format ("Pass value:{0}", _guid)); 

                    return _guid;

                });

                Console.WriteLine (String. Format ("Task Return value:{0}", _task. Result)); 

            }

            catch (Exception ex)

            {

                Console.WriteLine (String. Format ("Exception message:{0}", ex. Message.trim ())); 

            }

            Finally

            {

                Console.ReadLine ();

            }

        }

    }

}

Code effects

3.Task Task Continuation

Using System;

Using System.Diagnostics;

Using System.Threading;

Using System.Threading.Tasks;

Namespace ConsoleApplication17

{

    Class Program

    {

        void Main (string[] args)

        {

            Try

            {

                /*

                 * The delegate of the continuation task will pass in a reference to the previous task so that it can check its status.

                 * In addition, you can pass a user-defined value from the previous task to its continuation in the Result property.

                 * so that the output of the previous task can be used as input to the continuation task. ———— MSDN

                 */

                task<string> _task = task<string>. Factory.startnew (() = 

                {

                    "_task";

                    Console.WriteLine (_GUID);

                    return _guid;

                }). continuewith<string> (GUID)/=

                {

                    "_task ContinueWith";

                    Console.WriteLine (String. Format ("ContinueWith Task {0}", GUID. Result)); 

                    return _guid;

                });

                Console.WriteLine (String. Format ("Task Return value:{0}", _task. Result)); 

            }

            catch (Exception ex)

            {

                Console.WriteLine (String. Format ("Exception message:{0}", ex. Message.trim ())); 

            }

            Finally

            {

                Console.ReadLine ();

            }

        }

    }

}

Code effects

4. Detached nested tasks

Using System;Using System.Diagnostics;Using System.Threading;Using System.Threading.Tasks;Namespace consoleapplication17{Class Program {Staticvoid Main (String[] (args) {try {/* * If the user code running in the task creates a new task,  * and unspecified AttachedToParent option, the new task is not synchronized with the external task in any special way.  Such tasks are called "detached nested tasks." ———— msdn *   */Task _outer = Task.Factory.StartNew (() = {Console.WriteLine ( "Outer task beginning."); Task _child = Task.Factory.StartNew (() = {thread.spinwait (5000000); Console.WriteLine ( "Detached task completed."); }); _outer. Wait (); Console.WriteLine ( "Outer task completed."); catch (Exception ex) {Console.WriteLine (string. Format ( "Exception message:{0}", ex. Message.trim ())); } finally {console.readline ();}}}          

Code effects

5. Create Sub-tasks

Using System;Using System.Diagnostics;Using System.Threading;Using System.Threading.Tasks;Namespace consoleapplication17{Class Program {Staticvoid Main (String[] (args) {try {/** If you specify the attachedtoparent option when creating a task with user code running in a task,* The new task is called a subtask of the original task, and the original task is called the parent task. *  so you can use the AttachedToParent option represents a structured task parallelism. ———— msdn *   */Task _outer = Task.Factory.StartNew (() = {Console.WriteLine ( span class= "str" > "Outer task beginning."); Task _child = Task.Factory.StartNew (() = {thread.spinwait (5000000); Console.WriteLine ( "Detached task completed."), ); }); _outer. Wait (); Console.WriteLine ( "Outer task completed."); catch (Exception ex) {Console.WriteLine (string. Format ( "Exception message:{0}", ex. Message.trim ())); } finally {console.readline ();}}}          

Code effects

C # Task Parallel library using subtotal Z