异步通信实例2(Client)

  1using System;
  2using System.Drawing;
  3using System.Collections;
  4using System.ComponentModel;
  5using System.Windows.Forms;
  6using System.Data;
  7using System.Net;
  8using System.Net.Sockets;
  9using System.Threading;
 10
 11namespace TCLient
 12{
 13    /**//// <summary>
 14    /// Form1 的摘要说明。
 15    /// </summary>
 16    public class Form1 : System.Windows.Forms.Form
 17    {
 18        private System.Windows.Forms.TextBox txt;
 19        private System.Windows.Forms.StatusBar statBar;
 20        private System.Windows.Forms.TextBox txtIP;
 21        private System.Windows.Forms.TextBox sendText;
 22        private System.Windows.Forms.Button btnSend;
 23        private System.Windows.Forms.Button btnStart;
 24        private System.Net.Sockets.Socket client;
 25        private byte[] buffer;
 26        /**//// <summary>
 27        /// 必需的设计器变量。
 28        /// </summary>
 29        private System.ComponentModel.Container components = null;
 30
 31        public Form1()
 32        {
 33            //
 34            // Windows 窗体设计器支持所必需的
 35            //
 36            InitializeComponent();
 37
 38            //
 39            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
 40            //
 41        }
 42
 43        /**//// <summary>
 44        /// 清理所有正在使用的资源。
 45        /// </summary>
 46        protected override void Dispose( bool disposing )
 47        {
 48            if( disposing )
 49            {
 50                if (components != null) 
 51                {
 52                    components.Dispose();
 53                }
 54            }
 55            base.Dispose( disposing );
 56        }
 57
 58        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
 59        /**//// <summary>
 60        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
 61        /// 此方法的内容。
 62        /// </summary>
 63        private void InitializeComponent()
 64        {
 65            this.txt = new System.Windows.Forms.TextBox();
 66            this.statBar = new System.Windows.Forms.StatusBar();
 67            this.txtIP = new System.Windows.Forms.TextBox();
 68            this.sendText = new System.Windows.Forms.TextBox();
 69            this.btnSend = new System.Windows.Forms.Button();
 70            this.btnStart = new System.Windows.Forms.Button();
 71            this.SuspendLayout();
 72            // 
 73            // txt
 74            // 
 75            this.txt.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
 76                | System.Windows.Forms.AnchorStyles.Left) 
 77                | System.Windows.Forms.AnchorStyles.Right)));
 78            this.txt.Location = new System.Drawing.Point(0, 32);
 79            this.txt.Multiline = true;
 80            this.txt.Name = "txt";
 81            this.txt.Size = new System.Drawing.Size(584, 208);
 82            this.txt.TabIndex = 0;
 83            this.txt.Text = "";
 84            // 
 85            // statBar
 86            // 
 87            this.statBar.Location = new System.Drawing.Point(0, 244);
 88            this.statBar.Name = "statBar";
 89            this.statBar.Size = new System.Drawing.Size(584, 22);
 90            this.statBar.TabIndex = 1;
 91            // 
 92            // txtIP
 93            // 
 94            this.txtIP.Location = new System.Drawing.Point(8, 8);
 95            this.txtIP.Name = "txtIP";
 96            this.txtIP.Size = new System.Drawing.Size(96, 21);
 97            this.txtIP.TabIndex = 2;
 98            this.txtIP.Text = "192.168.0.14";
 99            // 
100            // sendText
101            // 
102            this.sendText.Location = new System.Drawing.Point(104, 8);
103            this.sendText.Name = "sendText";
104            this.sendText.Size = new System.Drawing.Size(272, 21);
105            this.sendText.TabIndex = 3;
106            this.sendText.Text = "";
107            // 
108            // btnSend
109            // 
110            this.btnSend.Location = new System.Drawing.Point(392, 8);
111            this.btnSend.Name = "btnSend";
112            this.btnSend.TabIndex = 4;
113            this.btnSend.Text = "发送";
114            this.btnSend.Click += new System.EventHandler(this.btnSend_Click);
115            // 
116            // btnStart
117            // 
118            this.btnStart.Location = new System.Drawing.Point(488, 8);
119            this.btnStart.Name = "btnStart";
120            this.btnStart.TabIndex = 4;
121            this.btnStart.Text = "开始";
122            this.btnStart.Click += new System.EventHandler(this.btnStart_Click);
123            // 
124            // Form1
125            // 
126            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
127            this.ClientSize = new System.Drawing.Size(584, 266);
128            this.Controls.Add(this.btnSend);
129            this.Controls.Add(this.sendText);
130            this.Controls.Add(this.txtIP);
131            this.Controls.Add(this.statBar);
132            this.Controls.Add(this.txt);
133            this.Controls.Add(this.btnStart);
134            this.Name = "Form1";
135            this.Text = "客户端";
136            this.Load += new System.EventHandler(this.Form1_Load);
137            this.ResumeLayout(false);
138
139        }
140        #endregion
141
142        /**//// <summary>
143        /// 应用程序的主入口点。
144        /// </summary>
145        [STAThread]
146        static void Main() 
147        {
148            Application.Run(new Form1());
149        }
150
151        private void Form1_Load(object sender, System.EventArgs e)
152        {
153            this.client = new Socket( AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp );
154            this.statBar.Text = "初始化完毕";
155            this.buffer = new byte[ 1024 ];
156        }
157
158        private void btnStart_Click(object sender, System.EventArgs e)
159        {
160            IPEndPoint ipep = new IPEndPoint( IPAddress.Parse( this.txtIP.Text ),9000 );
161            this.client.BeginConnect( (EndPoint)ipep,new AsyncCallback(this.ConnectCallback ),this.client );
162        }
163
164        private void ConnectCallback( System.IAsyncResult iar )
165        {
166            try
167            {
168                Socket server = (Socket)iar.AsyncState;
169                this.client.EndConnect( iar );
170                this.txt.Text += "\r\n已连接至服务器。";
171                this.statBar.Text = "连接到服务器:" + server.RemoteEndPoint.ToString();
172                this.client.BeginReceive( this.buffer,0,this.buffer.Length,SocketFlags.None,new AsyncCallback( this.ReceiveCallback ),this.client );        
173
174            }
175            catch( Exception ex )
176            {
177                this.txt.Text += "\r\n" + ex.ToString();
178            }
179        }
180
181        private void ReceiveCallback( System.IAsyncResult iar )
182        {
183            try
184            {
185                Socket remote = (Socket)iar.AsyncState;
186                int recv = remote.EndReceive( iar );
187                string tmp = System.Text.Encoding.Default.GetString( this.buffer,0,recv );
188                this.txt.Text += "\r\n从服务器端接收到:" + tmp;
189            }
190            catch( Exception ex )
191            {
192            }
193        }
194
195        private void Send()
196        {
197            byte[] tmp = System.Text.Encoding.Default.GetBytes( this.sendText.Text );
198            this.client.BeginSend( tmp,0,tmp.Length,SocketFlags.None,new AsyncCallback(this.SendCallback),this.client );
199        }
200
201        private void SendCallback( System.IAsyncResult iar )
202        {
203            try
204            {
205                Socket remote = (Socket)iar.AsyncState;
206                int s = remote.EndSend( iar );
207                remote.BeginReceive( this.buffer,0,this.buffer.Length,SocketFlags.None,new AsyncCallback(this.ReceiveCallback),remote );
208            }
209            catch( Exception ex )
210            {
211                this.txt.Text += "\r\n" + ex.ToString();
212            }
213        }
214
215        private void btnSend_Click(object sender, System.EventArgs e)
216        {
217            this.Send();
218        }
219    }
220}
221