异步通信实例1(Server)

  1using System;
  2using System.Drawing;
  3using System.Collections;
  4using System.ComponentModel;
  5using System.Windows.Forms;
  6using System.Data;
  7using System.Text;
  8using System.Net;
  9using System.Net.Sockets;
 10using System.Threading;
 11
 12namespace TServer
 13{
 14    /**//// <summary>
 15    /// Form1 的摘要说明。
 16    /// </summary>
 17    public class Form1 : System.Windows.Forms.Form
 18    {
 19        private System.Windows.Forms.TextBox txt;
 20        private System.Net.Sockets.Socket server;
 21        private System.Windows.Forms.ComboBox cmbIP;
 22        private System.Windows.Forms.Button btnStart;
 23        private System.Windows.Forms.Button btnStop;
 24        private System.Windows.Forms.StatusBar statBar;
 25        private System.Threading.ManualResetEvent allDone;
 26        private byte[] buffer;
 27        /**//// <summary>
 28        /// 必需的设计器变量。
 29        /// </summary>
 30        private System.ComponentModel.Container components = null;
 31
 32        public Form1()
 33        {
 34            //
 35            // Windows 窗体设计器支持所必需的
 36            //
 37            InitializeComponent();
 38
 39            //
 40            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
 41            //
 42        }
 43
 44        /**//// <summary>
 45        /// 清理所有正在使用的资源。
 46        /// </summary>
 47        protected override void Dispose( bool disposing )
 48        {
 49            if( disposing )
 50            {
 51                if (components != null) 
 52                {
 53                    components.Dispose();
 54                }
 55            }
 56            base.Dispose( disposing );
 57        }
 58
 59        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
 60        /**//// <summary>
 61        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
 62        /// 此方法的内容。
 63        /// </summary>
 64        private void InitializeComponent()
 65        {
 66            this.txt = new System.Windows.Forms.TextBox();
 67            this.cmbIP = new System.Windows.Forms.ComboBox();
 68            this.btnStart = new System.Windows.Forms.Button();
 69            this.btnStop = new System.Windows.Forms.Button();
 70            this.statBar = new System.Windows.Forms.StatusBar();
 71            this.SuspendLayout();
 72            // 
 73            // txt
 74            // 
 75            this.txt.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left) 
 76                | System.Windows.Forms.AnchorStyles.Right)));
 77            this.txt.Location = new System.Drawing.Point(0, 40);
 78            this.txt.Multiline = true;
 79            this.txt.Name = "txt";
 80            this.txt.Size = new System.Drawing.Size(472, 232);
 81            this.txt.TabIndex = 0;
 82            this.txt.Text = "";
 83            // 
 84            // cmbIP
 85            // 
 86            this.cmbIP.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
 87            this.cmbIP.Location = new System.Drawing.Point(8, 8);
 88            this.cmbIP.Name = "cmbIP";
 89            this.cmbIP.Size = new System.Drawing.Size(144, 20);
 90            this.cmbIP.TabIndex = 1;
 91            // 
 92            // btnStart
 93            // 
 94            this.btnStart.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
 95            this.btnStart.Location = new System.Drawing.Point(168, 8);
 96            this.btnStart.Name = "btnStart";
 97            this.btnStart.TabIndex = 2;
 98            this.btnStart.Text = "开始";
 99            this.btnStart.Click += new System.EventHandler(this.btnStart_Click);
100            // 
101            // btnStop
102            // 
103            this.btnStop.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
104            this.btnStop.Location = new System.Drawing.Point(272, 8);
105            this.btnStop.Name = "btnStop";
106            this.btnStop.TabIndex = 2;
107            this.btnStop.Text = "停止";
108            // 
109            // statBar
110            // 
111            this.statBar.Location = new System.Drawing.Point(0, 272);
112            this.statBar.Name = "statBar";
113            this.statBar.Size = new System.Drawing.Size(472, 22);
114            this.statBar.TabIndex = 3;
115            // 
116            // Form1
117            // 
118            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
119            this.ClientSize = new System.Drawing.Size(472, 294);
120            this.Controls.Add(this.statBar);
121            this.Controls.Add(this.btnStart);
122            this.Controls.Add(this.cmbIP);
123            this.Controls.Add(this.txt);
124            this.Controls.Add(this.btnStop);
125            this.Name = "Form1";
126            this.Text = "服务器端";
127            this.Load += new System.EventHandler(this.Form1_Load);
128            this.ResumeLayout(false);
129
130        }
131        #endregion
132
133        /**//// <summary>
134        /// 应用程序的主入口点。
135        /// </summary>
136        [STAThread]
137        static void Main() 
138        {
139            Application.Run(new Form1());
140        }
141
142        private void Form1_Load(object sender, System.EventArgs e)
143        {
144            this.server = new Socket( AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp );
145            this.allDone = new ManualResetEvent( true );
146            this.cmbIP.Items.Clear();
147            foreach( IPAddress ip in Dns.GetHostByName( Dns.GetHostName() ).AddressList )
148            {
149                this.cmbIP.Items.Add( ip.ToString() );
150            }
151            if( this.cmbIP.Items.Count > 0 )
152                this.cmbIP.SelectedIndex = 0;
153            this.statBar.Text = "初始化完成";
154            this.btnStop.Enabled = false;
155            this.buffer = new byte[ 1024];
156        }
157
158        private void btnStart_Click(object sender, System.EventArgs e)
159        {
160            try
161            {
162                IPEndPoint ipep = new IPEndPoint( IPAddress.Parse( this.cmbIP.Text ),9000 );
163                this.server.Bind( (EndPoint)ipep );
164                this.server.Listen( 10 );
165                this.server.BeginAccept( new AsyncCallback( this.AcceptCallback ),this.server );
166                this.statBar.Text = "服务器" + ipep.ToString() + "正在监听";
167                this.txt.Text = "开始等待客户端连接";
168            }
169            catch( Exception ex )
170            {
171                this.txt.Text += "\r\n" + ex.ToString();
172            }
173        }
174
175        private void AcceptCallback( System.IAsyncResult iar )
176        {
177            if( iar.IsCompleted )
178            {
179                try
180                {
181                    Socket oldServer = (Socket)iar.AsyncState;
182                    Socket client = (Socket)oldServer.EndAccept( iar );                    
183                    this.txt.Text += "\r\n远程客户端:" + client.RemoteEndPoint.ToString() + "连接";
184                    byte[] send = System.Text.Encoding.Default.GetBytes( "服务器端的响应 at " + DateTime.Now.ToString() );    
185                    client.BeginSend( send,0,send.Length,SocketFlags.None,new AsyncCallback(this.SendCallback ),client );
186                }
187                catch( Exception ex )
188                {
189                    this.txt.Text += "\r\n" + ex.ToString();
190                }
191            }
192        }
193
194        private void SendCallback( System.IAsyncResult iar )
195        {
196            try
197            {
198                Socket socket = (Socket)iar.AsyncState;
199                int send = socket.EndSend( iar );
200                this.txt.Text += "\r\n已发送至客户端数据,大小为:" + send.ToString();
201                socket.BeginReceive(this.buffer,0,this.buffer.Length,SocketFlags.None,new AsyncCallback(this.ReceiveCallback),socket );
202            }
203            catch( Exception ex )
204            {
205                this.txt.Text += "\r\n" + ex.ToString();
206            }
207        }
208
209        private void StartReceive()
210        {
211//            this.allDone.Reset();
212//            this.server.BeginReceive( this.buffer,0,this.buffer.Length,SocketFlags.None,new AsyncCallback(this.ReceiveCallback ),this.server );
213//            this.allDone.WaitOne();
214        }
215
216        private void ReceiveCallback( System.IAsyncResult iar )
217        {
218            try
219            {
220                
221                Socket client = (Socket)iar.AsyncState;
222                int recv = client.EndReceive( iar );
223                if( recv == 0 )
224                {
225                    client.Close();
226                    this.txt.Text += "\r\n等待客户端连接..:";
227                    this.server.BeginAccept( new AsyncCallback(this.AcceptCallback),this.server );
228                    return;
229                }
230                string msg = System.Text.Encoding.Default.GetString( this.buffer,0,recv );
231                this.txt.Text += "\r\n从" + client.RemoteEndPoint.ToString() + "接收到的数据是:" + msg;
232                byte[] re = System.Text.Encoding.Default.GetBytes( "服务器端已收到:" + msg );
233                client.BeginSend( re,0,re.Length,SocketFlags.None,new AsyncCallback(this.SendCallback ),client );
234            }
235            catch( Exception ex )
236            {
237                this.txt.Text += "\r\n" + ex.ToString();
238            }
239        }
240    }
241}
242