asp.net中Web使用Socket

落日映苍穹つ 2021-06-26 16:06 322阅读 0赞

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    using System.Threading;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    
    namespace Pro
    { 
        public partial class SoketPage : System.Web.UI.Page
        { 
            //服务端监听执行线程 
            protected void Page_Load(object sender, EventArgs e)
            { 
                if (!IsPostBack)
                { 
                    SocketServer socket = new SocketServer(12345, "127.0.0.1", txtServerInfo);
                    //启动线程 
                    Thread thread = new Thread(new ThreadStart(socket.beginListen));
                    thread.Start();
                    // 在应用程序启动时运行的代码 
                    //(new System.Threading.Thread(new System.Threading.ThreadStart(new Class1().CreatSocket))).Start();//开辟一个新线程 
                }
    
            }
    
            //客户端按钮事件
            protected void Button1_Click(object sender, EventArgs e)
            { 
                Socketclient client = new Socketclient(txtClientInfo, txtContent);
                client.StartClient();
    
            }
    
        }
    
    
        //客户端
        public class Socketclient
        { 
            TextBox txt;
            TextBox send_txt;
            public Socketclient(TextBox txt, TextBox send_txt)
            { 
                this.txt = txt;
                this.send_txt = send_txt;
            }
            public void StartClient()
            { 
                //传入数据的数据缓冲区.
                byte[] bytes = new byte[1024];
    
                // Connect to a remote device.
                try
                { 
                    // Establish the remote endpoint for the socket.
                    // This example uses port 11000 on the local computer.
                    //IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
                    IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
                    //获取服务器IP
                    //int ipindex = ipHostInfo.AddressList.Count();
                    //IPAddress ipAddress = ipHostInfo.AddressList[ipindex - 1];
                    //IPEndPoint remoteEP = new IPEndPoint(ipAddress, 12345);
    
    
                    //1.客户端与服务端地址是否一致；如果服务器使用net.tcp://127.0.0.1:8888，而客户端使用net.tcp://192.168.1.13:8888，这样是不行的，服务器端的地址也必须使用net.tcp://192.168.1.13:8888。
                    //2. 服务端是否开启了防火墙，从而导致端口无法被客户端机器访问，这时你可以使用telnet命令(telnet ip port)看看是否能打开指定IP的指定端口，如果不行，那最直接的办法就是先关闭防火墙，如果你即要打开防火墙，还要让端口可访问，那就需要你自己进行设置了(google一下吧)，这里就不详说了。
                    IPAddress address = IPAddress.Parse("127.0.0.1");
                    IPEndPoint remoteEP = new IPEndPoint(address, 12345);
    
    
    
                    // Create a TCP/IP socket.
                    Socket sender = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    
                    // Connect the socket to the remote endpoint. Catch any errors.
                    try
                    { 
                        sender.Connect(remoteEP);
                        // Console.WriteLine("Socket connected to {0}",sender.RemoteEndPoint.ToString());
                        txt.Text += "\r\n" + sender.RemoteEndPoint.ToString() + "\r\n";
                        // Encode the data string into a byte array.
                        byte[] msg = Encoding.UTF8.GetBytes(send_txt.Text + "<EOF>");
                        // Send the data through the socket.
                        int bytesSent = sender.Send(msg);
                        // Receive the response from the remote device.
                        int bytesRec = sender.Receive(bytes);
                        //Console.WriteLine("Echoed test = {0}",Encoding.UTF8.GetString(bytes,0,bytesRec));
                        txt.Text += "\r\n" + Encoding.UTF8.GetString(bytes, 0, bytesRec) + "\r\n";//接收远程服务器信息
    
                        // Release the socket.
                        sender.Shutdown(SocketShutdown.Both);
                        sender.Close();
                    }
                    catch (ArgumentNullException ane)
                    { 
                        // Console.WriteLine("ArgumentNullException : {0}",ane.ToString());
                        txt.Text += "\r\n" + ane.ToString() + "\r\n";
                    }
                    catch (SocketException se)
                    { 
                        // Console.WriteLine("SocketException : {0}",se.ToString());
                        txt.Text += "\r\n" + se.ToString() + "\r\n";
                    }
                    catch (Exception e)
                    { 
                        // Console.WriteLine("Unexpected exception : {0}", e.ToString());
                        txt.Text += "\r\n" + e.ToString() + "\r\n";
                    }
                }
                catch (Exception e)
                { 
                    // Console.WriteLine( e.ToString());
                    txt.Text += "\r\n" + e.ToString() + "\r\n";
                }
            }
        }
    
    
        //服务器端
        public class SocketServer
        { 
    
            int port;  //端口
            string host;//ip地址
            TextBox txt;
            /// <summary>
            /// 构造涵数
            /// </summary>
            /// <param name="ports">端口号</param>
            public SocketServer(int ports, string host, TextBox txt)
            { 
                this.port = ports;
                this.host = host;
                this.txt = txt;
            }
            //开始监听
            public void beginListen()
            { 
                try
                { 
                    IPAddress ip = IPAddress.Parse(host);//把ip地址字符串转换为IPAddress类型的实例
                    IPEndPoint ipe = new IPEndPoint(ip, port);//用指定的端口和ip初始化IPEndPoint类的新实例
                                                              ///创建socket并开始监听
                    Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个socket对像，如果用udp协议，则要用SocketType.Dgram类型的套接字
                    s.Bind(ipe);//绑定EndPoint对像（端口和ip地址）
                    s.Listen(0);//开始监听
                    txt.Text += "等待客户端连接";
                    // Console.WriteLine("等待客户端连接");
                    //定义循环，以便可以简历多次连接
                    while (true)
                    { 
                        Socket temp = s.Accept();//为新建连接创建新的socket 
                        while (true)
                        { 
                            string recvStr = "";
                            byte[] recvBytes = new byte[1024];
                            int bytes;
                            bytes = temp.Receive(recvBytes, recvBytes.Length, 0);//从客户端接受信息
                            recvStr += Encoding.UTF8.GetString(recvBytes, 0, bytes);
                            txt.Text += "\r\n" + recvStr + "\r\n";
                            if (recvStr.IndexOf("<EOF>") > -1)
                            { 
                                break;
                            }
                        }
                        //给client端返回信息
                        // Console.WriteLine("server get message:{0}", recvStr);//把客户端传来的信息显示出来
    
                        string sendStr = "消息 upload OK";
                        byte[] bs = Encoding.UTF8.GetBytes(sendStr);
                        temp.Send(bs, bs.Length, 0);//返回信息给客户端
                        temp.Shutdown(SocketShutdown.Both);
                        temp.Close();
    
                    }
                }
                catch (Exception ex)
                { 
                    string str = ex.ToString();
                    txt.Text += "\r\n" + str + "\r\n";
                }
            }
        }
    }

<!DOCTYPE html>
    
    <html>
    <head runat="server">
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
            <div>
                <asp:TextBox ID="txtServerInfo" runat="server" Height="206px" TextMode="MultiLine" Width="700px"></asp:TextBox>
                <hr />
                <asp:TextBox ID="txtClientInfo" runat="server" Height="197px" TextMode="MultiLine" Width="376px"></asp:TextBox>
                <asp:TextBox ID="txtContent" runat="server" Height="119px" TextMode="MultiLine"></asp:TextBox>
                <asp:Button ID="Button1" runat="server" Height="52px" OnClick="Button1_Click" Text="发送" Width="138px" />
            </div>
        </form>
    </body>
    </html>

## 如图： ##

![在这里插入图片描述][20190519150257668.png]

[20190519150257668.png]: /images/20210626/776dbfc5f8344f2dbcea254cf4e2c930.png