Created
May 29, 2017 13:39
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Async and Await - Asynchronous Programming
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<Window x:Class="AsyncAwaitExample.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:AsyncAwaitExample" | |
mc:Ignorable="d" | |
Title="MainWindow" Height="350" Width="525"> | |
<StackPanel> | |
<TextBlock Text="Enter number to sum:" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,50,0,0"/> | |
<TextBox Name="Input" Width="100" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,10,0,0" /> | |
<Button Content="Calculate" HorizontalAlignment="Center" VerticalAlignment="Center" Width="75" Margin="0,10,0,0" Click="Button_Click"/> | |
<TextBlock Text="The sum is:" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,25,0,0"/> | |
<TextBlock Name="Answer" Text="" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,10,0,0"/> | |
</StackPanel> | |
</Window> |
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
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 AsyncAwaitExample | |
{ | |
/// <summary> | |
/// Interaction logic for MainWindow.xaml | |
/// </summary> | |
public partial class MainWindow : Window | |
{ | |
public MainWindow() | |
{ | |
InitializeComponent(); | |
} | |
public async void DoSum(int number) | |
{ | |
Console.WriteLine("Task started"); | |
var result = Calculate(number); | |
Console.WriteLine("Task completed"); | |
if (!result.IsCompleted) | |
await result; | |
Answer.Text = result.Result.ToString(); | |
Console.WriteLine(string.Format("Answer is {0}", result.Result.ToString())); | |
} | |
public async Task<int> Calculate(int number) | |
{ | |
var sum = 0; | |
Task myTask = new Task(() => | |
{ | |
for (int i = 1; i <= number; i++) | |
{ | |
System.Threading.Thread.Sleep(1000); | |
sum += i; | |
} | |
}); | |
myTask.Start(); | |
await myTask; | |
return sum; | |
} | |
private void Button_Click(object sender, RoutedEventArgs e) | |
{ | |
if (!string.IsNullOrEmpty(Input.Text)) | |
{ | |
Console.WriteLine("Sum process started"); | |
var number = Convert.ToInt32(Input.Text); | |
DoSum(number); | |
Console.WriteLine("Sum process completed"); | |
} | |
} | |
} | |
} |
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Output -
Sum process started
Task started
Task completed
Sum process completed
Answer is 55