cweituo.txt

了解委托与事件的基本概念

   using System;
namespace MyCollections 
{
	using System.Collections;
	public delegate void ChangedEventHandler(object sender, EventArgs e);
	public class ListWithChangedEvent: ArrayList 
	{
		public event ChangedEventHandler Changed;
		protected virtual void OnChanged(EventArgs e) 
		{
			if (Changed != null)
				Changed(this, e);
		}
		public override int Add(object value) 
		{
			int i = base.Add(value);
			OnChanged(EventArgs.Empty);
			return i;
		}
		public override void Clear() 
		{
			base.Clear();
			OnChanged(EventArgs.Empty);
		}
		public override object this[int index] 
		{
			set 
			{
				base[index] = value;
				OnChanged(EventArgs.Empty);
			}
		}
	}
}
namespace TestEvents 
{
	using MyCollections;
	class EventListener 
	{
		private ListWithChangedEvent List;
		public EventListener(ListWithChangedEvent list) 
		{
			List = list;
			List.Changed += new ChangedEventHandler(ListChanged);
		}
		private void ListChanged(object sender, EventArgs e) 
		{
			Console.WriteLine("开始让我处理了！");
		}
		public void Detach() 
		{
			List.Changed -= new ChangedEventHandler(ListChanged);
			List = null;
		}
	}
	class Test 
	{
		public static void Main() 
		{
			ListWithChangedEvent list = new ListWithChangedEvent();
			EventListener listener = new EventListener(list);
			list.Add("item 1");
			list.Clear();
			listener.Detach();
			Console.Read();
		}
	}
}
实验二、控件应用
实验目的:熟悉C#.NET的winform窗体控件和WEB控件的使用
        实验要求：
1、winform窗体控件使用:
设计一个winform窗体，包括mainmenu控件、textbox控件、tooltip控件、tabcontrol控件、listview控件，并编写相应的事件响应代码
2、简单网页：
设计一个网页，包括button控件、textbox控件、panel控件、listbox控件、dropdownlist控件、image控件、hyperlink控件、table控件、marquee控件、embed控件、iframe控件、弹出对话框、验证控件，并编写相应的响应代码。

实验三、ADO。NET编程
        实验目的：学习数据库联接，了解sqldataadapter和sqldatareader工作原理
        实验内容与要求：
            编程联接数据库，在winform上显示sqlserver2000中的pubs数据库的authers的内容，利用水晶报表把显示的内容生成报表；比较sqldataadapter和sqldatareader的区别。
实验四、实验目的：了解实现tcp点对点通信、udp点对点、组播的步骤和程序基本架构
        实验内容与要求：
        阅读和调试完成下列参考程序；修改UDP点对点程序使它能进行在广域网中两局域网之间进行点对点通信。
1、开发tcp同步和异步套接字点对点通信程序 
//服务器端
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace TestSyncServer
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{

		private Socket socket;
		private Socket clientSocket;
		Thread thread;

		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.TextBox textBoxIP;
		private System.Windows.Forms.TextBox textBoxPort;
		private System.Windows.Forms.Button buttonStart;
		private System.Windows.Forms.Button buttonSend;
		private System.Windows.Forms.Button buttonStop;
		private System.Windows.Forms.ListBox listBoxState;
		private System.Windows.Forms.RichTextBox richTextBoxAccept;
		private System.Windows.Forms.RichTextBox richTextBoxSend;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;


		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
			this.listBoxState.Items.Clear();
			this.richTextBoxAccept.Text="";
			this.richTextBoxSend.Text="";

		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.listBoxState = new System.Windows.Forms.ListBox();
			this.textBoxIP = new System.Windows.Forms.TextBox();
			this.textBoxPort = new System.Windows.Forms.TextBox();
			this.buttonStart = new System.Windows.Forms.Button();
			this.buttonSend = new System.Windows.Forms.Button();
			this.buttonStop = new System.Windows.Forms.Button();
			this.richTextBoxAccept = new System.Windows.Forms.RichTextBox();
			this.richTextBoxSend = new System.Windows.Forms.RichTextBox();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "服务器IP";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(8, 72);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(56, 23);
			this.label2.TabIndex = 0;
			this.label2.Text = "监听端口";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(8, 136);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(56, 23);
			this.label3.TabIndex = 0;
			this.label3.Text = "接收信息";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(8, 224);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(56, 23);
			this.label4.TabIndex = 0;
			this.label4.Text = "发送信息";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.listBoxState);
			this.groupBox1.Location = new System.Drawing.Point(216, 16);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.TabIndex = 1;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "服务器状态";
			// 
			// listBoxState
			// 
			this.listBoxState.ItemHeight = 12;
			this.listBoxState.Location = new System.Drawing.Point(8, 16);
			this.listBoxState.Name = "listBoxState";
			this.listBoxState.Size = new System.Drawing.Size(184, 76);
			this.listBoxState.TabIndex = 0;
			// 
			// textBoxIP
			// 
			this.textBoxIP.Location = new System.Drawing.Point(72, 32);
			this.textBoxIP.Name = "textBoxIP";
			this.textBoxIP.ReadOnly = true;
			this.textBoxIP.Size = new System.Drawing.Size(128, 21);
			this.textBoxIP.TabIndex = 2;
			this.textBoxIP.Text = "127.0.0.1";
			// 
			// textBoxPort
			// 
			this.textBoxPort.Location = new System.Drawing.Point(72, 72);
			this.textBoxPort.Name = "textBoxPort";
			this.textBoxPort.ReadOnly = true;
			this.textBoxPort.TabIndex = 3;
			this.textBoxPort.Text = "6788";
			// 
			// buttonStart
			// 
			this.buttonStart.Location = new System.Drawing.Point(56, 320);
			this.buttonStart.Name = "buttonStart";
			this.buttonStart.TabIndex = 5;
			this.buttonStart.Text = "开始监听";
			this.buttonStart.Click += new System.EventHandler(this.buttonStart_Click);
			// 
			// buttonSend
			// 
			this.buttonSend.Location = new System.Drawing.Point(168, 320);
			this.buttonSend.Name = "buttonSend";
			this.buttonSend.TabIndex = 5;
			this.buttonSend.Text = "发送信息";
			this.buttonSend.Click += new System.EventHandler(this.buttonSend_Click);
			// 
			// buttonStop
			// 
			this.buttonStop.Location = new System.Drawing.Point(288, 320);
			this.buttonStop.Name = "buttonStop";
			this.buttonStop.TabIndex = 5;
			this.buttonStop.Text = "停止监听";
			this.buttonStop.Click += new System.EventHandler(this.buttonStop_Click);
			// 
			// richTextBoxAccept
			// 
			this.richTextBoxAccept.Location = new System.Drawing.Point(72, 120);
			this.richTextBoxAccept.Name = "richTextBoxAccept";
			this.richTextBoxAccept.Size = new System.Drawing.Size(344, 96);
			this.richTextBoxAccept.TabIndex = 6;
			this.richTextBoxAccept.Text = "richTextBoxAccept";
			// 
			// richTextBoxSend
			// 
			this.richTextBoxSend.Location = new System.Drawing.Point(72, 224);
			this.richTextBoxSend.Name = "richTextBoxSend";
			this.richTextBoxSend.Size = new System.Drawing.Size(344, 80);
			this.richTextBoxSend.TabIndex = 6;
			this.richTextBoxSend.Text = "richTextBoxSend";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(432, 349);
			this.Controls.Add(this.richTextBoxAccept);
			this.Controls.Add(this.buttonStart);
			this.Controls.Add(this.textBoxPort);
			this.Controls.Add(this.textBoxIP);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.buttonSend);
			this.Controls.Add(this.buttonStop);
			this.Controls.Add(this.richTextBoxSend);
			this.Name = "Form1";
			this.Text = "服务器";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
			this.Load += new System.EventHandler(this.Form1_Load);
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void buttonStart_Click(object sender, System.EventArgs e)
		{
			this.buttonStart.Enabled=false;
			IPAddress ip=IPAddress.Parse(this.textBoxIP.Text);
			IPEndPoint server=new IPEndPoint(ip,Int32.Parse(this.textBoxPort.Text));
			socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
			socket.Bind(server);
			//监听客户端连接
			socket.Listen(10);
			clientSocket=socket.Accept();
			//显示客户IP和端口号
this.listBoxState.Items.Add("与客户 "+clientSocket.RemoteEndPoint.ToString()+" 建立连接");
			//创建一个线程接收客户信息
			thread=new Thread(new ThreadStart(AcceptMessage));
			thread.Start();
		}

		private void AcceptMessage()
		{
			while(true)
			{
				try
				{
					NetworkStream netStream=new NetworkStream(clientSocket);
					byte[] datasize=new byte[4];
					netStream.Read(datasize,0,4);

					int size=System.BitConverter.ToInt32(datasize,0);
					Byte[] message=new byte[size];
					int dataleft=size;
					int start=0;
					//while(dataleft>0)
					{
						int recv=netStream.Read(message,start,dataleft);
						//start+=recv;
						//dataleft-=recv;
					}
					//string gg;
					//gg=message.ToString();
					this.richTextBoxAccept.Rtf=System.Text.Encoding.Unicode.GetString(datasize);
				}
				catch
				{
					this.listBoxState.Items.Add("与客户断开连接");
					break;
				}
			}

		}

		private void buttonSend_Click(object sender, System.EventArgs e)
		{
			string str=this.richTextBoxSend.Rtf;
			int i=str.Length;
			if(i==0)
			{
				return;
			}
			else
			{
				 //因为str为Unicode编码，每个字符占2字节，所以实际字节数应*2
				i*=2;
			}
			byte[] datasize=new byte[4];
			 //将32位整数值转换为字节数组
			datasize=System.BitConverter.GetBytes(i);
			byte[] sendbytes=System.Text.Encoding.Unicode.GetBytes(str);
			try
			{
				NetworkStream netStream=new NetworkStream(clientSocket);
				netStream.Write(datasize,0,4);
				netStream.Write(sendbytes,0,sendbytes.Length);
				netStream.Flush();
				this.richTextBoxSend.Rtf="";
			}
			catch
			{
				MessageBox.Show("无法发送!");
			}
		}

		private void buttonStop_Click(object sender, System.EventArgs e)
		{
			this.buttonStart.Enabled=true;
			try
			{
				socket.Shutdown(SocketShutdown.Both);
				socket.Close();
				if(clientSocket.Connected)
				{
					clientSocket.Close();
					thread.Abort();
				}
			}
			catch
			{
				MessageBox.Show("监听尚未开始，关闭无效!");
			}
		}

		private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			try
			{
				socket.Shutdown(SocketShutdown.Both);
				socket.Close();
				if(clientSocket.Connected)
				{
					clientSocket.Close();
					thread.Abort();
				}
			}
			catch
			{}
		}

		
	}