Progress with Async/Await

 

ProgressWithAsyncAwait.zip

0.01MB

 

MainWindow.xaml

<Window x:Class="ProgressWithAsyncAwait.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ProgressWithAsyncAwait"
        mc:Ignorable="d"
        Title="Progress with Async Await" Height="300" Width="400">
    <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
        <ProgressBar x:Name="progressBar" Height="30" Width="300"/>
        <TextBlock x:Name="textBlock" Text="Start" FontSize="48" Margin="20" HorizontalAlignment="Center" VerticalAlignment="Center"/>
        <Button Width="300" Height="50" Content="Loop Through Number" FontSize="22" FontWeight="Bold" Click="Button_Click"/>
    </StackPanel>
</Window>

 

 

MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace ProgressWithAsyncAwait
{
    /// <summary>
    /// MainWindow.xaml에 대한 상호 작용 논리
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            var progress = new Progress<int>(value =>
            {
                progressBar.Value = value;
                textBlock.Text = $"{value}%";
            });
            await Task.Run(() => LoopThroghNumbers(100, progress));
            textBlock.Text = "Completed";
        }

        void LoopThroghNumbers(int count, IProgress<int> progress)
        {
            for (int x = 0; x < count; x++)
            {
                Thread.Sleep(100);
                var percentComplete = (x * 100) / count;
                progress.Report(percentComplete);
            }
        }
    }
}

 

 

Do not use Task.Run in the implementation of the method, instead, use Task.Run to call the method.

• 시간이 오래 걸리는 메서드를 만들어 async/await 기능을 사용할때, 메서드 내부에서 Task.Run 을 사용하면 안된다.
• 시간이 오래 걸리는 메서들를 호출하는 쪽에서 Task.Run 을 사용하여 메서드를 호출해야 한다.

 

 

https://www.youtube.com/watch?v=zQMNFEz5IVU