C#网络编程----（三）委托和多线程

要求：

1、  定义并使用委托实现如下输出：

                 Morning, Jimmy Zhang

                  早上好, 张子阳

2、 分别通过以下三种方式将信息添加到窗口中。

•       第一种方式：直接向textBlock中添加信息
•       第二种方式：通过调用方法向textBlock中添加信息
•       第三种方式：通过多线程向textBlock中添加信息

3、如何在页面不停的显示字母“a”？

4、如何在页面不停的显示字母“a”和“b”？

效果：

 

前台源代码

后台源代码

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

namespace ch003
{
    /// 

    /// MainWindow.xaml 的交互逻辑
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }


        //第一题
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            textBlock1.Text = "第一题（定义并使用委托）\n";
            Great("Jimmy Zhang", EnglishGreat);
            Great("张子阳",ChineseGreat);
        }

        public void ChineseGreat(string name)
        {
            textBlock1.Text += "早上好," + name+"\n";
        }
        public void EnglishGreat(string name)
        {
            textBlock1.Text += "Morning," + name+"\n";
        }

        public delegate void MakeGreating(string name);

        private void Great(string name,MakeGreating mg)
        {
            mg(name);
        }


        //第二题
        private void button2_Click(object sender, RoutedEventArgs e)
        {
            textBlock1.Text = "第二题（三种方式显示‘你好’）\n";
            
            //2.第一种
            textBlock1.Text += "你好\n";

            //2.第二种
            Add1();

            //2.第三种
            Thread t1 = new Thread(AddMessage);
            t1.Start();
        }
        private void Add1()
        {
            textBlock1.Text += "你好\n";
        }

        public delegate void AddMessageDelegate();
        private void AddMessage()
        {
            AddMessageDelegate d = Add2;
            textBlock1.Dispatcher.Invoke(d);
        }
        private void Add2()
        {
            textBlock1.Text += "你好";
        }


        //第三题
        private void button3_Click(object sender, RoutedEventArgs e)
        {
            textBlock1.Text = "第三题(在页面不停的显示字母a)\n";
            
            Thread t2 = new Thread(MyShowa);
            
            t2.Start(); 
            
        }
        public delegate void show();
        private void MyShowa()
        {
            show d = Show_a;
            
            for (int i = 1; i <= 100;i++ )
            {
                
                textBlock1.Dispatcher.Invoke(d);
                Thread.Sleep(100);
            }
            
        }
        
        private void Show_a()
        {
            
            textBlock1.Text += "a ";
        }


        //第四题
        private void button4_Click(object sender, RoutedEventArgs e)
        {
            textBlock1.Text = "第四题(在页面不停的显示字母a和b)\n";
            Thread t3 = new Thread(MyShowa);
            t3.Start();

            Thread t4 = new Thread(MyShowb);
            t4.Start();
        }

        private void MyShowb()
        {
            show d = Show_b;

            for (int i = 1; i <= 100; i++)
            {
                textBlock1.Dispatcher.Invoke(d);
                Thread.Sleep(100);
            }

        }

        private void Show_b()
        {
            textBlock1.Text += "b ";
        }
        

    }
}

ps:线程池的使用ThreadPool

在屏幕上不断地输出abcd并且可以停止

前台代码：

 

后台代码：

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

namespace ch03
{
    /// 

    /// MainWindow.xaml 的交互逻辑
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private static volatile bool isstop = false;
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            isstop = false;
            Data data1 = new Data { Message = "a", Info = "\n线程1已停止" };
            Thread t1 = new Thread(Mymethod);
            t1.Start(data1);

            Data data2 = new Data { Message = "b", Info = "\n线程2已停止" };
            Thread t2 = new Thread(Mymethod);
            t2.Start(data2);

            //使用线程池
            Data data3 = new Data { Message = "c", Info = "\n线程3已停止" };
            ThreadPool.QueueUserWorkItem(new WaitCallback(Mymethod),data3);

            Data data4 = new Data { Message = "d", Info = "\n线程4已停止" };
            ThreadPool.QueueUserWorkItem(new WaitCallback(Mymethod), data4);
        }
        public void Mymethod(object m)
        {
            Data obj = m as Data;//类型转换
            while (isstop==false) 
            {
                method(obj.Message);
                Thread.Sleep(100);
            }
            method(obj.Info);//输出结束语
        }
        public void method(string m)
        {
            //委托 vs2010写法
            Action act = delegate()
            {
                textBlock1.Text += m;
            };
            textBlock1.Dispatcher.Invoke(act);
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            isstop = true;
        }
    }
    public class Data
    {
        public string Info { get; set; }
        public string Message { get; set; }
    }
}