[C#/TPL/.NET5] Task 클래스 : 모든 태스크 종료시까지 대기하기

TestProject.zip

0.00MB

▶ Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 값 구하기 (비동기) - GetValueAsync(source)

        /// <summary>
        /// 값 구하기 (비동기)
        /// </summary>
        /// <param name="source">소스 값</param>
        /// <returns>값 태스크</returns>
        private static async Task<int> GetValueAsync(int source)
        {
            await Task.Delay(TimeSpan.FromSeconds(source));

            return source;
        }

        #endregion
        #region 태스크 실행하기 (비동기) - ExecuteTaskAsync(task)

        /// <summary>
        /// 태스크 실행하기 (비동기)
        /// </summary>
        /// <param name="task">태스크</param>
        /// <returns>태스크</returns>
        private static async Task ExecuteTaskAsync(Task<int> task)
        {
            int result = await task;

            Console.WriteLine(result);
        }

        #endregion
        #region 태스크 처리하기 (비동기) - ProcessTaskAsync()

        /// <summary>
        /// 태스크 처리하기 (비동기)
        /// </summary>
        /// <returns>태스크</returns>
        private static async Task ProcessTaskAsync()
        {
            Task<int> task1 = GetValueAsync(2);
            Task<int> task2 = GetValueAsync(3);
            Task<int> task3 = GetValueAsync(1);

            Task<int>[] sourceTaskArray = new[] { task1, task2, task3 };

            IEnumerable<Task> taskEnumerable = from task in sourceTaskArray select ExecuteTaskAsync(task);

            Task[] targetTaskArray = taskEnumerable.ToArray();

            await Task.WhenAll(targetTaskArray);
        }

        #endregion
        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        /// <returns>태스크</returns>
        private async static Task Main()
        {
            await ProcessTaskAsync();
        }

        #endregion
    }
}