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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OPCAutomation;

namespace kepserverHelp
{
    class kepOpcHelp
    {
        private static OPCServer kepServer =null; //服务器
        private static OPCGroups kepGroups = null; //组
        private static OPCGroup KepGroup = null; //组
        private static OPCItems KepItems = null;
        public static myOpcItem[] item;

        private static String serIp; //服务器IP
        private static String serverName; //服务器名字

        public static bool OpcErr = false;//错误标志


        /// <summary>
        /// 连接服务器,创建组,添加变量
        /// </summary>
        public static string kepOpcConnect()
        {
            serIp = "localhost";//服务器在本机
            serverName = "KEPware.KEPServerEx.V4";

            try
            {
                //step1打开服务器
                kepServer = new OPCServer();
                kepServer.Connect(serverName, serIp);
                
                //step2添加组
                kepGroups = kepServer.OPCGroups;
                KepGroup = kepGroups.Add("Group0");
                KepGroup.UpdateRate = 100; //更新循环时间
                KepGroup.IsActive = true;
                KepGroup.IsSubscribed = true;

                //step3添加组变量组
                KepItems = KepGroup.OPCItems;

                //初始化自定义标签变量数组
                init_itemName();

                //在变量组中初始化标签变量数组
                addItem();
                return "OK";
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }

        /// <summary>
        /// 初始化OPC标签的连接字符串
        /// </summary>
        private static void init_itemName()
        {
            item =new myOpcItem[12];
            for (int i = 0; i < item.Length; i  )
            {
                item[i] = new myOpcItem();
                item[i].ClientHandles = i;
            }

            item[0].ConnectName = "Channel1.Device1.T100";
            item[1].ConnectName = "Channel1.Device1.T101";
            item[2].ConnectName = "Channel1.Device1.T102";
            item[3].ConnectName = "Channel1.Device1.T103";
            item[4].ConnectName = "Channel1.Device1.T104";
            item[5].ConnectName = "Channel1.Device1.T105";
            item[6].ConnectName = "Channel1.Device1.T106";
            item[7].ConnectName = "Channel1.Device1.T107";
            item[8].ConnectName = "Channel1.Device1.T108";
            item[9].ConnectName = "Channel1.Device1.T109";
            item[10].ConnectName = "Channel1.Device1.T110";
            item[11].ConnectName = "Channel1.Device1.T111";
        }

        /// <summary>
        /// 在服务器组中添加变量
        /// </summary>
        /// <param name="theNum"></param>
        public static void addItem()
        {
            if (OpcErr)
            {
                throw new Exception("添加OPC标签异常,OpcErr==true");
            }
            
            try
            {
                for (int i = 0; i < item.Length; i  )//在OPC组中增加变量标签
                {
                    item[i].MyOpcItem = KepItems.AddItem(item[i].ConnectName, item[i].ClientHandles);
                    item[i].ServerHandle = item[i].MyOpcItem.ServerHandle;
                }
            }
            catch (Exception ex)
            {

                OpcErr = true;
                throw new Exception("添加OPC标签异常,"   ex.Message);
            }
        }

        /// <summary>
        /// 销毁资源，引用赋值NULL
        /// </summary>
        public static void destory()
        {
            try
            {
                foreach (myOpcItem myitem in item)
                {
                    if (myitem.MyOpcItem != null)
                    {
                        
                        myitem.MyOpcItem = null;
                    }
                }
                if (KepItems!= null)
                {
                    KepItems = null;
                }
                if (KepGroup != null)
                {
                    KepGroup = null;
                }
                if (kepGroups != null)
                {
                    kepGroups = null;
                }
                if (kepServer != null)
                {
                    kepServer.Disconnect();
                    kepServer = null;
                }
            }
            catch (Exception)
            {
                return;
            }
            
        }
    }
}