C#上位机之—WinForm实现Socket异步通讯示例

工作中常用到的一些知识点,总是用完就忘,第一次尝试用博客记录下来,以备后用;

Socket通讯,Socket(套接字)是基于TCP/IP通讯方式的封装好的类,调用时需要添加下面的服务引用:

.......
10 using System.Net; 11 using System.Net.Sockets;

窗体页面搭建,上面为服务器区,下面为客户端区:

C#上位机之—WinForm实现Socket异步通讯示例

建立两个类,一个表示服务器,一个表示客户端,

首先建立服务器类:

1.声明变量:IP地址,端口号,EndPoint,Socket类,数据Buffer等

C#上位机之—WinForm实现Socket异步通讯示例
 1         string ip;//IP地址
 2         string port;//端口号
 3         IPEndPoint endPoint;//网络端点
 4         Socket socServer;//侦听连接套接字
 5         Socket socClient;//通讯套接字
 6         byte[] dataReceived = new byte[50000];
 7 
 8         public delegate void delegateDisplayMsg(string type,string msg);
 9         public delegateDisplayMsg OnDisplay;
10 
11         public SocketServer()
12         {
13             socServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
14         }
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2.侦听连接函数:

C#上位机之—WinForm实现Socket异步通讯示例
       public void StartListen(string ip,string port)
       {
            this.ip = ip;
            this.port = port;
            endPoint = new IPEndPoint(IPAddress.Parse(this.ip), int.Parse(port));
            socServer.Bind(endPoint);
            socServer.Listen(0);
            socServer.BeginAccept(new AsyncCallback(OnClientConnect), null);
            ShowMsg("Wait Connect");
        }
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3.接受数据函数:

C#上位机之—WinForm实现Socket异步通讯示例
public void OnClientConnect(IAsyncResult asyn)
        {
            socClient = socServer.EndAccept(asyn);
            WaitForData();
            ShowMsg("Client Connected  " + socClient.RemoteEndPoint.ToString());
        }
        public void WaitForData()
        {
            if (socClient != null)
                socClient.BeginReceive(dataReceived, 0, dataReceived.Length, SocketFlags.None, new AsyncCallback(OnDataReceived), null);
        }
        public void OnDataReceived(IAsyncResult asyn)
        {
            int dataLength = socClient.EndReceive(asyn);
            byte[] chars = new byte[dataLength];
            Buffer.BlockCopy(dataReceived, 0, chars, 0, dataLength);
            string msg = Encoding.ASCII.GetString(chars);
            ShowMsg("<=" + msg);
            WaitForData();
        }
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4.发送数据函数:

C#上位机之—WinForm实现Socket异步通讯示例
        public void SendMsg(string msg)
        {
            byte[] data = Encoding.Default.GetBytes(msg);
            socClient.Send(data);
            ShowMsg("=>" + msg);
        }
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然后建立客户端类:

1.声明变量

C#上位机之—WinForm实现Socket异步通讯示例
        string ip;//IP地址
        string port;//端口号
        IPEndPoint endPoint;//网络端点
        Socket socClient;//通讯套接字
        byte[] dataReceived = new byte[50000];//数据Buffer

        public delegate void delegateDisplayMsg(string type,string msg);
        public delegateDisplayMsg OnDisplay;

        public SocketClient()
        {
            socClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        }
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2.连接服务器函数:

C#上位机之—WinForm实现Socket异步通讯示例
        public void Connect(string ip, string port)
        {
            this.ip = ip;
            this.port = port;
            endPoint = new IPEndPoint(IPAddress.Parse(this.ip), int.Parse(port));
            socClient.BeginConnect(endPoint, new AsyncCallback(OnToConnected), null);
        }
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3.接受数据函数:

C#上位机之—WinForm实现Socket异步通讯示例
        public void OnToConnected(IAsyncResult asyn)
        {
            socClient.EndConnect(asyn);
            WaitForData();
            ShowMsg("Connect Success");
        }
        public void WaitForData()
        {
            if (socClient != null)
                socClient.BeginReceive(dataReceived, 0, dataReceived.Length, SocketFlags.None, new AsyncCallback(OnDataReceived), null);
        }
        public void OnDataReceived(IAsyncResult asyn)
        {
            int dataLenth = socClient.EndReceive(asyn);
            byte[] chars = new byte[dataLenth];
            Buffer.BlockCopy(dataReceived, 0, chars, 0, dataLenth);
            string msg = Encoding.ASCII.GetString(chars);
            ShowMsg("<=" + msg);
            WaitForData();
        }
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4.发送数据函数:

C#上位机之—WinForm实现Socket异步通讯示例
        public void SendMsg(string msg)
        {
            byte[] data = Encoding.Default.GetBytes(msg);
            socClient.Send(data);
            ShowMsg("=>" + msg);
        }
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服务器类与客户端类,已经建立完成,下面对两个类进行实例化,并Link窗体控件的事件函数,如下:

1.实例化:

        public void Init()
        {
            Server = new SocketServer();
            Client = new SocketClient();
            Server.OnDisplay += ShowMsg;
            Client.OnDisplay += ShowMsg;
        }

2.按钮点击事件:

C#上位机之—WinForm实现Socket异步通讯示例
        private void btn_StartListen_Click(object sender, EventArgs e)
        {
            Server.StartListen(txt_serverIP.Text.ToString(), txt_serverPort.Text.ToString());
            btn_StartListen.BackColor = Color.LimeGreen;
        }

        private void btn_Connect_Click(object sender, EventArgs e)
        {
            Client.Connect(txt_clientIP.Text.ToString(), txt_clientPort.Text.ToString());
        }

        private void btn_serverSend_Click(object sender, EventArgs e)
        {
            Button b = (Button)sender;
            bool isServer = b.Name.Contains("server");
            if (isServer)
                Server.SendMsg(txt_serverMsg.Text.ToString());
            else
                Client.SendMsg(txt_clientMsg.Text.ToString());
        }
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现在启动程序,测试发送接收功能是否正常

C#上位机之—WinForm实现Socket异步通讯示例

至此,一个简单的Socket通讯模型已经完成,实际应用中还需考虑通讯异常,通讯协议,多个客户端通讯等事项,第一次写博,欢迎大家多多指正;

C#上位机之—WinForm实现Socket异步通讯示例

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