TPL 02 Tasks with parameters

Tasks like threads can only receive objects as parameters, they can be declared inline or passed in as parameters

using System;

using System.Threading.Tasks;

namespace pc.tplExample02

{

    class Program

    {

        static Random rnd = new Random(DateTime.Now.Millisecond);

        static void Main(string[] args)

        {

            var t1 = new Task(name => {

                Console.WriteLine($"{name} started");

                Task.WaitAll(Task.Delay(rnd.Next(1000, 2000)));

                Console.WriteLine($"{name} finished");

            }, "Pawel");

            t1.Start();

            var t2 = Task.Factory.StartNew(name =>

            {

                Console.WriteLine($"{name} started");

                Task.WaitAll(Task.Delay(rnd.Next(1000, 2000)));

                Console.WriteLine($"{name} finished");

            }, "Magda");

            var t3 = Task.Factory.StartNew(MyTask, "Marin");

            var t4 = Task.Factory.StartNew(MyTask, "Jakub");

            Task.WaitAll(t1, t2, t3, t4);

        }

        static void MyTask(object o) {

            Console.WriteLine($"{o} started");

            Task.WaitAll(Task.Delay(rnd.Next(1000, 2000)));

            Console.WriteLine($"{o} finished");

        }

    }

}

Above is a simple example where we cast a string as an object and just leverage the native string classes toString() method, however we could have passed a struct as a parameter and just boxed and unboxed it.

using System;

using System.Threading.Tasks;

namespace pc.tplExample02

{

    class Program

    {

        static Random rnd = new Random(DateTime.Now.Millisecond);

        struct Data

        {

            public string Name { get; private set; }

            public string Task { get; private set; }

            public Data(string Name, string Task)

            {

                this.Name = Name;

                this.Task = Task;

            }

        }

        static void Main(string[] args)

        {

            var t1 = Task.Factory.StartNew(MyTask,

                new Data("Pawel", "Task A"));

            var t2 = Task.Factory.StartNew(MyTask,

                new Data("Magda", "Task B"));

            var t3 = Task.Factory.StartNew(MyTask,

                new Data("Marin", "Task C"));

            var t4 = Task.Factory.StartNew(MyTask,

                new Data("Jakub", "Task D"));

            Task.WaitAll(t1, t2, t3, t4);

        }

        static void MyTask(object o)

        {

            var d = (Data)o;

            Console.WriteLine($"{d.Name} started");

            Task.WaitAll(Task.Delay(rnd.Next(1000, 2000)));

            Console.WriteLine($"{d.Name} finished");

        }

    }

}

just like we worked with threads passing an object in as a parameter