[开发工具]wpf多线程应用以解决耗时操作对UI界面造成的失去响应的问题

内容说明：视频教程总结

代码平台：visual? studio? 2019

一、MainWindow.xaml

<Window x:Class="test.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:test"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <TextBlock HorizontalAlignment="Left" Margin="377,165,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" MouseLeftButtonDown="TextBlock_MouseLeftButtonDown"/>
        <TextBox x:Name="value"  HorizontalAlignment="Left" Height="23" Margin="138,211,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120"/>

    </Grid>
</Window>

二、MainWindow.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 test
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        //添加async，使点击事件支持异步
        private async void TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
          await Task.Run(Download);//异步执行耗时操作函数
            
        }
        private void Download()//耗时操作
        {
            for (int i = 0;i< 1000000000;i++)
            {
                int a = 3;
                int b = 4;
                int c = a + b;
                int d = a + b + c;
                int e = a + b + c + d;
                
            }
        }
    }
}

1.点击事件添加async

2.await Task.Run(函数);//异步执行耗时操作函数

3.编写耗时操作的函数

说明：如果耗时操作中涉及到UI界面的更新，可以结合MVVM框架实现；