Handle Exceptions in Tasks - CSharp Thread Asynchronous

CSharp examples for Thread Asynchronous:Task

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Description

Handle Exceptions in Tasks

Demo Code


using System;/*from   ww w .j av a  2  s  .  co  m*/
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

class MainClass
    {
        static void Main(string[] args)
        {
            Task goodTask = Task.Factory.StartNew(() => performTask("good"));
            Task badTask = Task.Factory.StartNew(() => performTask("bad"));

            try
            {
                Task.WaitAll(goodTask, badTask);
            }
            catch (AggregateException aggex)
            {
                aggex.Handle(ex => handleException(ex));
            }

            Console.WriteLine("\nMain method complete. Press Enter");
            Console.ReadLine();
        }

        static bool handleException(Exception exception)
        {
            Console.WriteLine("Processed Exception");
            Console.WriteLine(exception);
            // return true to indicate we have handled the exception
            return true;
        }

        static void performTask(string label)
        {
            if (label == "bad")
            {
                Console.WriteLine("About to throw exception.");
                throw new ArgumentOutOfRangeException("label");
            }
            else
            {
                Console.WriteLine("performTask for label: {0}", label);
            }
        }
    }

Result


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