Passing the result of one task as an input into another - CSharp Thread Asynchronous

CSharp examples for Thread Asynchronous:Task

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Description

Passing the result of one task as an input into another

Demo Code

using System;//from w w w  .  j a v  a2  s  .co m
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 $"12 products cost more than {amount:C}.";
    }
    static void Main(string[] args)
    {
        WriteLine("Passing the result of one task as an input into another.");
        var taskCallWebServiceAndThenStoredProcedure = Task.Factory.StartNew(CallWebService).ContinueWith(previousTask => CallStoredProcedure(previousTask.Result));
        WriteLine($"{taskCallWebServiceAndThenStoredProcedure.Result}");
        WriteLine("Press ENTER to end.");
        ReadLine();
    }
}

Result


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