日笔记--C# 从数据库取表格到DataGridView---json传输

只作为个人学习笔记。

 class OpData
    {

        // 创建一个和客户端通信的套接字
        Socket socketwatch = null;
        //连接Access字符串
        string strCon;
        OleDbConnection myCon;
        public TcpListener link(NetChgbCientr.Form1.Updata ud)
        {
            //定义一个套接字用于监听客户端发来的消息，包含三个参数（IP4寻址协议，流式连接，Tcp协议）
            socketwatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //服务端发送信息需要一个IP地址和端口号
            IPAddress address = IPAddress.Parse("192.168.1.112");
            TcpListener tls = new TcpListener(address, );
            tls.Start();
            Connect();  //连接数据库
            ud("服务已启动！\n");
            return tls;
        }

        //服务启动 - - 连接数据库
        public void Connect()
        {
            strCon = @"Provider = Microsoft.Jet.OLEDB.4.0;Data Source =
                    D:\project\NEWPROJECT\NetChgbServer\bin\Debug\Data2.mdb";  //地址改为全路径
            //实例化连接数据库对象
            myCon = new OleDbConnection(strCon);
            //开启连接
            myCon.Open();
        }

        //查询全部数据json格式传个客户端
        public DataSet Query(String strCom)
        {
           // String strCom = "SELECT * FROM CHGB";
            //实例化数据集
            DataSet myDataSet = new DataSet();
            OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, myCon);
            myCommand.Fill(myDataSet, "CHGB");
            if (myDataSet != null && myDataSet.Tables.Count > )//判断得到的是不是null或没有数据的
            {
                return myDataSet;

            }
            else
            {
                DataSet DS = new DataSet();
                return DS;

            }
        }

    }

  //业务逻辑
    class BllData
    {
        TcpListener tls;
        // 创建一个和客户端通信的套接字
        Socket socketwatch = null;
        OpData Od = new OpData();
        Dictionary<string, Socket> clientConnectionItems = new Dictionary<string, Socket> { };

        //启动服务器
        public void Open(NetChgbCientr.Form1.Updata ud)
        {
            tls = Od.link(ud);
            //负责监听客户端的线程:创建一个监听线程
            Thread threadwatch = new Thread(watchconnecting);
            threadwatch.IsBackground = true;
            //启动线程
            threadwatch.Start(ud);

        }

        //查询全部数据--json转换

        public void QueryAll()
        {
            DataSet ds = new DataSet();
            List<CHGB> lis = new List<CHGB>();
            String strCom = "SELECT * FROM CHGB";
            ds = Od.Query(strCom);  //返回查询结果
            //判断是不是空数据
            if (ds == null || ds.Tables.Count <=  || ds.Tables[].Rows.Count <= )
            {
                return;
            }
            //有数据继续往下执行
            for (int i = ; i < ds.Tables.Count; i++)
            {
                foreach (DataRow dts in ds.Tables[i].Rows)
                {
                    CHGB ch = new CHGB();
                    ch.JH1 = dts[].ToString();
                    ch.QSJS1 = dts[].ToString();
                    ch.ZZJS1 = dts[].ToString();
                    ch.HD1 = dts[].ToString();
                    ch.SB1 = dts[].ToString();
                    ch.SND1 = dts[].ToString();
                    ch.CZ1 = dts[].ToString();
                    ch.HD21 = dts[].ToString();
                    ch.JSJG1 = dts[].ToString();
                    lis.Add(ch);
                }
            }
            string ja = JsonConvert.SerializeObject(lis); //json序列化，直接将取出来的表格拆分成对象存入集合中，在用下面的方法序列化
            this.Send(ja);
            }

        //监听客户端发来的请求
        public void watchconnecting(object ud)
        {
            //tcpClient是socket的封装（tcpclient.client()方法可以得到socket
            TcpClient remoteClient = null;
            //持续不断监听客户端发来的请求
            while (true)
            {
                try
                {
                    remoteClient = tls.AcceptTcpClient();
                }
                catch (Exception ex)
                {
                    //提示套接字监听异常
                    MessageBox.Show(ex.Message);
                    break;
                }

                //获取客户端的IP和端口号
                IPAddress IP = (remoteClient.Client.RemoteEndPoint as IPEndPoint).Address;
                int Port = (remoteClient.Client.RemoteEndPoint as IPEndPoint).Port;

                //让客户显示"连接成功的"的信息
                string sendmsg = "连接服务端成功！\r\n" + "本地IP:" + IP + "，本地端口" + Port;
                byte[] arrSendMsg = Encoding.UTF8.GetBytes(sendmsg);
                remoteClient.Client.Send(arrSendMsg);
                //给外面也弄个套接字
                socketwatch = remoteClient.Client;
                //客户端网络结点号
                string remoteEndPoint = remoteClient.Client.RemoteEndPoint.ToString();
                //显示与客户端连接情况
                String str = "成功与" + remoteEndPoint + "客户端建立连接！\t\n";
                //添加客户端信息
                NetChgbCientr.Form1.Updata ifu = (NetChgbCientr.Form1.Updata)ud;
                ifu(str);
                clientConnectionItems.Add(remoteEndPoint, remoteClient.Client);

                //IPEndPoint netpoint = new IPEndPoint(clientIP,clientPort);
                IPEndPoint netpoint = remoteClient.Client.RemoteEndPoint as IPEndPoint;

                ArrayList li = new ArrayList();
                li.Add(remoteClient.Client);
                li.Add(ud);

                //创建一个通信线程      收
                ParameterizedThreadStart pts = new ParameterizedThreadStart(recv);
                Thread thread = new Thread(pts);
                //设置为后台线程，随着主线程退出而退出
                thread.IsBackground = true;
                //启动线程
                thread.Start(li);
            }
        }

        // 接收客户端发来的信息，客户端套接字对象
        public void recv(object li)
        {
            Socket socketServer = (li as ArrayList)[] as Socket;

            while (true)
            {
                //创建一个内存缓冲区，其大小为1024*1024字节  即1M
                byte[] arrServerRecMsg = new byte[ * ];
                //将接收到的信息存入到内存缓冲区，并返回其字节数组的长度
                try
                {
                    //获取长度判断请求
                    int length = socketServer.Receive(arrServerRecMsg);

                    switch (length)
                    {
                        case : this.QueryAll();
                            break;
                        case : MessageBox.Show("还没写 显示一条");
                            break;
                    }

                    //将机器接受到的字节数组转换为人可以读懂的字符串
                    //string strSRecMsg = Encoding.UTF8.GetString(arrServerRecMsg, 0, length);
                    //将发送的字符串信息附加到文本框txtMsg上
                    //NetChgbServer.Form1.Updata inc = (li as ArrayList)[1] as NetChgbServer.Form1.Updata;
                    //inc("客户端:" + socketServer.RemoteEndPoint + ",time:" + GetCurrentTime() + "\r\n" + strSRecMsg + "\r\n\n");
                }
                catch (Exception ex)
                {
                    clientConnectionItems.Remove(socketServer.RemoteEndPoint.ToString());

                    MessageBox.Show("Client Count:" + clientConnectionItems.Count);

                    //提示套接字监听异常
                    MessageBox.Show("客户端" + socketServer.RemoteEndPoint + "已经中断连接" + "\r\n" + ex.Message + "\r\n" + ex.StackTrace + "\r\n");
                    //关闭之前accept出来的和客户端进行通信的套接字
                    socketServer.Close();
                    break;
                }
            }
        }

        //发送消息给客服端
        public void Send(String Ja)
        {

            //将输入的内容字符串转换为机器可以识别的字节数组
            byte[] arrClientSendMsg = Encoding.UTF8.GetBytes(Ja);
            //调用客户端套接字发送字节数组
            socketwatch.Send(arrClientSendMsg);
        }

    }

 public partial class Form1 : Form
    {
        public delegate void Updata(string s);
        ViShow Vs = new ViShow();
        public Form1()
        {
            InitializeComponent();
        }//启服务
        private void Open_Click(object sender, EventArgs e)
        {

           Updata ud = new Updata(UpdateLabel2);
            Vs.ViOpen(ud);

        }

        private void text1_TextChanged(object sender, EventArgs e)
        {

        }

        //主线程外访问控件
        private void UpdateLabel2(String str)
        {

            if (text1.InvokeRequired)
            {
                // 当一个控件的InvokeRequired属性值为真时，说明有一个创建它以外的线程想访问它
                Action<string> actionDelegate = (x) => { text1.AppendText(x.ToString()); };
                // 或者
                // Action<string> actionDelegate = delegate(string txt) { this.label2.Text = txt; };
                text1.Invoke(actionDelegate, str);
            }
            else
            {
                text1.AppendText(str);
            }
        }

    }

  public partial class Form1 : Form
    {
        Thread threadclient = null;
        Socket socketclient = null;
        int sign;
        public Form1()
        {
            InitializeComponent();;
        }

        //DataShow 容器
        private void DataShow_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }

        //显示全部数据按钮  ShowAll
        private void button1_Click(object sender, EventArgs e)
        {
            sign = ;
            //将输入的内容字符串转换为机器可以识别的字节数组
            byte[] arrClientSendMsg = Encoding.UTF8.GetBytes("");
            //调用客户端套接字发送字节数组
            socketclient.Send(arrClientSendMsg);

        }

        //连接服务器
        private void butt2_Click(object sender, EventArgs e)
        {
            //定义一个套接字监听
            socketclient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            //获取文本框中的IP地址
            IPAddress address = IPAddress.Parse("192.168.1.112");

            //将获取的IP地址和端口号绑定在网络节点上
            IPEndPoint point = new IPEndPoint(address, );
            try
            {
                //客户端套接字连接到网络节点上，用的是Connect
                socketclient.Connect(point);

                sign = ;
            }
            catch (Exception)
            {
                MessageBox.Show("连接失败\r\n");
                return;
            }
            threadclient = new Thread(recv);
            threadclient.IsBackground = true;
            threadclient.Start();
        }

        // 接收服务端发来信息的方法
        void recv()
        {
            //持续监听服务端发来的消息
            while (true)
            {
                //定义一个1M的内存缓冲区，用于临时性存储接收到的消息
                byte[] arrRecvmsg = new byte[ * ];

                //将客户端套接字接收到的数据存入内存缓冲区，并获取长度
                int length = socketclient.Receive(arrRecvmsg);

                //将套接字获取到的字符数组转换为人可以看懂的字符串
                string strRevMsg = Encoding.UTF8.GetString(arrRecvmsg, , length);  

            Control.CheckForIllegalCrossThreadCalls = false;  //这里不允许这样操作访问控件，这里为了测试方便
            if (sign == )
            {
                MessageBox.Show(strRevMsg);
                this.butt2.Text = "断开连接";
                sign = ;
            }
            else
            {
                MessageBox.Show(strRevMsg);
                List<CHGB> list = JsonConvert.DeserializeObject<List<CHGB>>(strRevMsg);

                //先给DataSource 一个地址，再把list给DataGridView控件
                //不给地址会报 ”引用没有作用到实例上“
                DataTable dt = new DataTable();
                this.DataShow.DataSource = dt;// list;
                this.DataShow.DataSource = list;
            }

            }
        }