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用C#开发OPC客户端

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///鄙视那些拿代码当宝贝的人,鄙视那些拿源码换源码的人,鄙视那些自私的人。
///别人看到你的代码,你能死啊?对你有多大威胁啊?强烈鄙视~~~
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Collections;
using OPCAutomation;

namespace OPC测试通过
{
    public partial class MainFrom : Form
    {
        public MainFrom()
        {
            InitializeComponent();
        }

        #region 私有变量
        /// <summary>
        /// OPCServer Object
        /// </summary>
        OPCServer KepServer;
        /// <summary>
        /// OPCGroups Object
        /// </summary>
        OPCGroups KepGroups;
        /// <summary>
        /// OPCGroup Object
        /// </summary>
        OPCGroup KepGroup;
        /// <summary>
        /// OPCItems Object
        /// </summary>
        OPCItems KepItems;
        /// <summary>
        /// OPCItem Object
        /// </summary>
        OPCItem KepItem;
        /// <summary>
        /// 主机IP
        /// </summary>
        string strHostIP = "";
        /// <summary>
        /// 主机名称
        /// </summary>
        string strHostName = "";
        /// <summary>
        /// 连接状态
        /// </summary>
        bool opc_connected = false;
        /// <summary>
        /// 客户端句柄
        /// </summary>
        int itmHandleClient = 0;
        /// <summary>
        /// 服务端句柄
        /// </summary>
        int itmHandleServer = 0;
        #endregion

        #region 方法
        /// <summary>
        /// 枚举本地OPC服务器
        /// </summary>
        private void GetLocalServer()
        {
            //获取本地计算机IP,计算机名称
            IPHostEntry IPHost = Dns.Resolve(Environment.MachineName);
            if (IPHost.AddressList.Length > 0)
            {
                strHostIP = IPHost.AddressList[0].ToString();
            }
            else
            {
                return;
            }
            //通过IP来获取计算机名称,可用在局域网内
            IPHostEntry ipHostEntry = Dns.GetHostByAddress(strHostIP);
            strHostName=ipHostEntry.HostName.ToString();

            //获取本地计算机上的OPCServerName
            try
            {
                KepServer = new OPCServer();
                object serverList = KepServer.GetOPCServers(strHostName);

                foreach (string turn in (Array)serverList)
                {
                    cmbServerName.Items.Add(turn);
                }

                cmbServerName.SelectedIndex = 0;
                btnConnServer.Enabled = true;
            }
            catch(Exception err)
            {
                MessageBox.Show("枚举本地OPC服务器出错:"+err.Message,"提示信息",MessageBoxButtons.OK,MessageBoxIcon.Warning);
            }

        }
        /// <summary>
        /// 创建组
        /// </summary>
        private bool CreateGroup()
        {
            try
            {
                KepGroups = KepServer.OPCGroups;
                KepGroup = KepGroups.Add("OPCDOTNETGROUP");
                SetGroupProperty();
                KepGroup.DataChange += new DIOPCGroupEvent_DataChangeEventHandler(KepGroup_DataChange);
                KepGroup.AsyncWriteComplete += new DIOPCGroupEvent_AsyncWriteCompleteEventHandler(KepGroup_AsyncWriteComplete);
                KepItems = KepGroup.OPCItems;
            }
            catch (Exception err)
            {
                MessageBox.Show("创建组出现错误:"+err.Message,"提示信息",MessageBoxButtons.OK,MessageBoxIcon.Warning);
                return false;
            }
            return true;
        }
        /// <summary>
        /// 设置组属性
        /// </summary>
        private void SetGroupProperty()
        {
            KepServer.OPCGroups.DefaultGroupIsActive =Convert.ToBoolean(txtGroupIsActive.Text);
            KepServer.OPCGroups.DefaultGroupDeadband = Convert.ToInt32(txtGroupDeadband.Text);
            KepGroup.UpdateRate = Convert.ToInt32(txtUpdateRate.Text);
            KepGroup.IsActive = Convert.ToBoolean(txtIsActive.Text);
            KepGroup.IsSubscribed =Convert.ToBoolean(txtIsSubscribed.Text);
        }
        /// <summary>
        /// 列出OPC服务器中所有节点
        /// </summary>
        /// <param name="oPCBrowser"></param>
        private void RecurBrowse(OPCBrowser oPCBrowser)
        {
            //展开分支
            oPCBrowser.ShowBranches();
            //展开叶子
            oPCBrowser.ShowLeafs(true);
            foreach (object turn in oPCBrowser)
            {
                listBox1.Items.Add(turn.ToString());
            }
        }
        /// <summary>
        /// 获取服务器信息,并显示在窗体状态栏上
        /// </summary>
        private void GetServerInfo()
        {
            tsslServerStartTime.Text ="开始时间:"+ KepServer.StartTime.ToString()+"    ";
            tsslversion.Text ="版本:"+ KepServer.MajorVersion.ToString() + "." + KepServer.MinorVersion.ToString()+"."+KepServer.BuildNumber.ToString();
        }
        /// <summary>
        /// 连接OPC服务器
        /// </summary>
        /// <param name="remoteServerIP">OPCServerIP</param>
        /// <param name="remoteServerName">OPCServer名称</param>
        private bool ConnectRemoteServer(string remoteServerIP, string remoteServerName)
        {
            try
            {
                KepServer.Connect(remoteServerName, remoteServerIP);

                if (KepServer.ServerState == (int)OPCServerState.OPCRunning)
                {
                    tsslServerState.Text = "已连接到-" + KepServer.ServerName + "   ";
                }
                else
                {
                    //这里你可以根据返回的状态来自定义显示信息,请查看自动化接口API文档
                    tsslServerState.Text = "状态:" + KepServer.ServerState.ToString() + "   ";
                }
            }
            catch (Exception err)
            {
                MessageBox.Show("连接远程服务器出现错误:" + err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return false;
            }
            return true;
        }
        #endregion

        #region 事件
        /// <summary>
        /// 写入TAG值时执行的事件
        /// </summary>
        /// <param name="TransactionID"></param>
        /// <param name="NumItems"></param>
        /// <param name="ClientHandles"></param>
        /// <param name="Errors"></param>
        void KepGroup_AsyncWriteComplete(int TransactionID, int NumItems, ref Array ClientHandles, ref Array Errors)
        {
            lblState.Text = "";
            for (int i = 1; i <= NumItems; i++)
            {
                lblState.Text += "Tran:" + TransactionID.ToString() + "   CH:" + ClientHandles.GetValue(i).ToString() + "   Error:" + Errors.GetValue(i).ToString();
            }
        }
        /// <summary>
        /// 每当项数据有变化时执行的事件
        /// </summary>
        /// <param name="TransactionID">处理ID</param>
        /// <param name="NumItems">项个数</param>
        /// <param name="ClientHandles">项客户端句柄</param>
        /// <param name="ItemValues">TAG值</param>
        /// <param name="Qualities">品质</param>
        /// <param name="TimeStamps">时间戳</param>
        void KepGroup_DataChange(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)
        {
            //为了测试,所以加了控制台的输出,来查看事物ID号
            //Console.WriteLine("********"+TransactionID.ToString()+"*********");
            for (int i = 1; i <= NumItems; i++)
            {
                this.txtTagValue.Text = ItemValues.GetValue(i).ToString();
                this.txtQualities.Text = Qualities.GetValue(i).ToString();
                this.txtTimeStamps.Text = TimeStamps.GetValue(i).ToString();
            }
        }
        /// <summary>
        /// 选择列表项时处理的事情
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                if (itmHandleClient != 0)
                {
                    this.txtTagValue.Text = "";
                    this.txtQualities.Text ="";
                    this.txtTimeStamps.Text = "";

                    Array Errors;
                    OPCItem bItem = KepItems.GetOPCItem(itmHandleServer);
                    //注:OPC中以1为数组的基数
                    int[] temp = new int[2] { 0, bItem.ServerHandle };
                    Array serverHandle = (Array)temp;
                    //移除上一次选择的项
                    KepItems.Remove(KepItems.Count, ref serverHandle, out Errors);
                }
                itmHandleClient = 1234;
                KepItem = KepItems.AddItem(listBox1.SelectedItem.ToString(), itmHandleClient);
                itmHandleServer = KepItem.ServerHandle;
            }
            catch(Exception err)
            {
                //没有任何权限的项,都是OPC服务器保留的系统项,此处可不做处理。
                itmHandleClient = 0;
                txtTagValue.Text = "Error ox";
                txtQualities.Text = "Error ox";
                txtTimeStamps.Text = "Error ox";
                MessageBox.Show("此项为系统保留项:"+err.Message,"提示信息");
            }
        }
        /// <summary>
        /// 载入窗体时处理的事情
        /// </summary>
        private void MainFrom_Load(object sender, EventArgs e)
        {
            GetLocalServer();
        }
        /// <summary>
        /// 关闭窗体时处理的事情
        /// </summary>
        private void MainFrom_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!opc_connected)
            {
                return;
            }

            if (KepGroup != null)
            {
                KepGroup.DataChange -= new DIOPCGroupEvent_DataChangeEventHandler(KepGroup_DataChange);
            }

            if (KepServer != null)
            {
                KepServer.Disconnect();
                KepServer = null;
            }

            opc_connected = false;
        }
        /// <summary>
        /// 【按钮】设置
        /// </summary>
        private void btnSetGroupPro_Click(object sender, EventArgs e)
        {
            SetGroupProperty();
        }
        /// <summary>
        /// 【按钮】连接OPC服务器
        /// </summary>
        private void btnConnLocalServer_Click(object sender, EventArgs e)
        {
            try
            {
                if (!ConnectRemoteServer(txtRemoteServerIP.Text,cmbServerName.Text))
                {
                    return;
                }

                btnSetGroupPro.Enabled = true;

                opc_connected = true;

                GetServerInfo();

                RecurBrowse(KepServer.CreateBrowser());

                if (!CreateGroup())
                {
                    return;
                }
            }
            catch (Exception err)
            {
                MessageBox.Show("初始化出错:" + err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }
        /// <summary>
        /// 【按钮】写入
        /// </summary>
        private void btnWrite_Click(object sender, EventArgs e)
        {
            OPCItem bItem = KepItems.GetOPCItem(itmHandleServer);
            int[] temp = new int[2] { 0, bItem.ServerHandle };
            Array serverHandles=(Array)temp;
            object[] valueTemp = new object[2] {"",txtWriteTagValue.Text };
            Array values=(Array)valueTemp;
            Array Errors;
            int cancelID;
            KepGroup.AsyncWrite(1,ref serverHandles,ref values,out Errors, 2009,out cancelID);
            //KepItem.Write(txtWriteTagValue.Text);//这句也可以写入,但并不触发写入事件
            GC.Collect();
        }
        #endregion
    }
}


本文转自tiasys博客园博客,原文链接:http://www.cnblogs.com/tiasys/archive/2009/08/30/1556908.html,如需转载请自行联系原作者

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