Running methods asynchronously on multiple threads - CSharp Thread Asynchronous

CSharp examples for Thread Asynchronous:Thread

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Description

Running methods asynchronously on multiple threads

Demo Code

using System;/*from  w w w.jav a  2  s  .  c  om*/
using System.Threading;
using System.Threading.Tasks;
using System.Diagnostics;
using static System.Console;
class Program
{
   static void MethodA()
   {
      WriteLine("Starting Method A...");
      Thread.Sleep(3000); // simulate three seconds of work
      WriteLine("Finished Method A.");
   }
   static void MethodB()
   {
      WriteLine("Starting Method B...");
      Thread.Sleep(2000); // simulate two seconds of work
      WriteLine("Finished Method B.");
   }
   static void MethodC()
   {
      WriteLine("Starting Method C...");
      Thread.Sleep(1000); // simulate one second of work
      WriteLine("Finished Method C.");
   }
   static decimal CallWebService()
   {
      WriteLine("Starting call to web service...");
      Thread.Sleep((new Random()).Next(2000, 4000));
      WriteLine("Finished call to web service.");
      return 89.99M;
   }
   static string CallStoredProcedure(decimal amount)
   {
      WriteLine("Starting call to stored procedure...");
      Thread.Sleep((new Random()).Next(2000, 4000));
      WriteLine("Finished call to stored procedure.");
      return $"12 products cost more than {amount:C}.";
   }
   static void Main(string[] args)
   {
      var timer = Stopwatch.StartNew();
      WriteLine("Running methods synchronously on one thread.");
      MethodA();
      MethodB();
      MethodC();
      WriteLine("Running methods asynchronously on multiple threads.");
      Task taskA = new Task(MethodA);
      taskA.Start();
      Task taskB = Task.Factory.StartNew(MethodB);
      Task taskC = Task.Run(new Action(MethodC));
      Task[] tasks = { taskA, taskB, taskC };
      Task.WaitAll(tasks);
      WriteLine("Passing the result of one task as an input into another.");
      var taskCallWebServiceAndThenStoredProcedure =Task.Factory.StartNew(CallWebService).ContinueWith(previousTask =>CallStoredProcedure(previousTask.Result));
      WriteLine($"{taskCallWebServiceAndThenStoredProcedure.Result}");
      WriteLine($"{timer.ElapsedMilliseconds:#,##0}ms elapsed.");
      WriteLine("Press ENTER to end.");
      ReadLine();
   }
}

Result


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