C#网络应用编程,实验4:线程管理练习
【摘要】 实验4:线程管理练习 1、创建一个WPF应用程序项目 2、将App.xaml中的Application.Resources节内容改为 3、修改MainWindow.xaml及代码隐藏类 MainWindow.xaml.cs主要内容 Page2.xaml Page2.xaml.cs 新建Helps类 运行结果 实验4:线程管理练习1、通过本实验,熟悉和掌握Thread类、ThreadPool...
实验4:线程管理练习
1、通过本实验,熟悉和掌握Thread类、ThreadPool类以及WPF中多线程的使用。
2、复习C#中lambda表达式和委托
1、创建一个WPF应用程序项目
2、将App.xaml中的Application.Resources节内容改为
<Application x:Class="WpfApp1.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApp1"
StartupUri="MainWindow.xaml">
<Application.Resources>
<Style x:Key="LabelStyle" TargetType="Label">
<Setter Property="FontSize" Value="14"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="HorizontalAlignment" Value="Center" />
<Setter Property="Background" Value="AliceBlue"/>
</Style>
<Style x:Key="BorderStyle" TargetType="Border">
<Setter Property="Height" Value="35"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="Background" Value="AliceBlue"/>
</Style>
</Application.Resources>
</Application>
3、修改MainWindow.xaml及代码隐藏类
MainWindow.xaml
<Window x:Class="WpfApp1.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:WpfApp1"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid Margin="20">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Rectangle Grid.ColumnSpan="2" Fill="White" RadiusX="14" RadiusY="14" Stroke="Blue" StrokeDashArray="3"/>
<Rectangle Grid.Column="0" Margin="7" Fill="#FFF0F9D8" RadiusX="10" RadiusY="10" Stroke="Blue" StrokeDashArray="3"/>
<Rectangle Grid.Column="0" Margin=" 20" Fill="White" Stroke="Blue"/>
<ScrollViewer Grid.Column="0" Margin="20">
<StackPanel>
<StackPanel.Resources>
<Style TargetType="Button">
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="Margin" Value="5 10 5 0"/>
<Setter Property="Padding" Value=" 15 0 15 0"/>
<Setter Property="FontSize" Value=" 10"/>
<EventSetter Event="Click" Handler="button_Click"/>
</Style>
</StackPanel.Resources>
<Button Content="例1(StartStopProcess)" Tag="/Examples/Page1.xaml"/>
</StackPanel>
</ScrollViewer>
<Frame Name="frame1" Grid.Column="1" Margin="10" BorderThickness="1" BorderBrush="Blue" NavigationUIVisibility="Hidden"/>
</Grid>
</Window>
MainWindow.xaml.cs主要内容
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 WpfApp1
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
Button oldButton = new Button();
public MainWindow()
{
InitializeComponent();
}
private void button_Click(object sender, RoutedEventArgs e)
{
Button btn = e.Source as Button;
btn.Foreground = Brushes.Black;
oldButton.Foreground = Brushes.Black;
oldButton = btn;
frame1.Source = new Uri(btn.Tag.ToString(), UriKind.Relative);
}
}
}
Page2.xaml
<Page x:Class="WpfApp1.Examples.Page2"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:WpfApp1.Examples"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
Title="Page2">
<DockPanel Background="White">
<Label DockPanel.Dock="Top" Content="Thread和ThreadPool基本用法"
Style="{StaticResource LabelStyle}"/>
<Border DockPanel.Dock="Bottom" Style="{StaticResource BorderStyle}">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
<Button Name="btnStart" Width="70"
Content="启动任务" Click="btnStart_Click"/>
<Button Name="btnStop" Margin="20 0 0 0" Width="70"
Content="停止任务" Click="btnStop_Click"/>
</StackPanel>
</Border>
<TextBlock x:Name="textBlock1" Height="237" TextWrapping="Wrap" Text="" VerticalAlignment="Top"/>
</DockPanel>
</Page>
Page2.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 WpfApp1.Examples
{
/// <summary>
/// Page2.xaml 的交互逻辑
/// </summary>
public partial class Page2 : Page
{
public Page2()
{
InitializeComponent();
Helps.ChangeState(btnStart, true, btnStop, false);
}
private void btnStop_Click(object sender, RoutedEventArgs e)
{
MyClass.IsSTop = true;
Helps.ChangeState(btnStart, true, btnStop, false);
}
private void btnStart_Click(object sender, RoutedEventArgs e)
{
Helps.ChangeState(btnStart, false, btnStop, true);
MyClass.IsSTop = false;
textBlock1.Text = "";
MyClass c = new MyClass(textBlock1);
MyData state = new MyData { Message = "a", Info = "\n线程1已终止" };
Thread thread1 = new Thread(c.MyMethod);
thread1.IsBackground = true;
thread1.Start(state);
state = new MyData { Message = "b", Info = "\n线程2已终止" };
Thread thread2 = new Thread(c.MyMethod);
thread2.IsBackground = true;
thread2.Start(state);
state = new MyData { Message = "c", Info = "\n线程3已终止" };
ThreadPool.QueueUserWorkItem(new WaitCallback(c.MyMethod), state);
state = new MyData { Message = "d", Info = "\n线程4已终止" };
ThreadPool.QueueUserWorkItem(new WaitCallback(c.MyMethod), state);
}
}
public class MyClass
{
public static volatile bool IsSTop;
TextBlock textBlock1;
public MyClass(TextBlock textBlock1)
{
this.textBlock1 = textBlock1;
}
public void MyMethod(object obj)
{
MyData state = obj as MyData;
while (IsSTop==false)
{
AddMessage(state.Message);
Thread.Sleep(1000);
}
AddMessage(state.Info);
}
private void AddMessage(string s)
{
textBlock1.Dispatcher.Invoke(() =>
{
textBlock1.Text += s;
});
}
}
public class MyData
{
public string Info { get; set; }
public string Message { get; set; }
}
}
新建Helps类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
namespace WpfApp1.Examples
{
class Helps
{
public static void ChangeState(Button btnStart,bool isStart,Button btnStop,bool isStop)
{
btnStart.IsEnabled = isStart;
btnStop.IsEnabled = isStop;
}
}
}
运行结果
在实验3的基础上实现了实验4
通过本实验,即熟悉和掌握了线程管理Thread类、线程池ThreadPool类以及
WPF中多线程的使用,又复习C#中lambda表达式和委托。
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