C#调用OPCDAAuto.dll开发OPC客户端组件

C#调用OPCDAAuto.dll开发OPC客户端组件

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1.得到OPCDAAuto.dll组件，使用regsvr32命令注册该组件；

2.新建组件项目，增加引用(COM选项)，选择 OPC DA Automation Wrapper 2.02；

3.配置文件设置，使得组件能够更灵活，重复使用，本文只设置一个组；



OPC.SimaticNET //OPC Server连接串
//结点，本机为空字符串

BJTS //自定义组名
S7:[DEMO] //组单元字符串
0 //组的默认死区 1024 //组的默认通信区域编号
200 //组的默认刷新率
0 //组的默认时间偏差
1 //是否活动有效

SysState //单元项名称，此名称唯一
0 //读：0、写：1、读写类型：2
1 //是否活动有效
DB10,INT0,1 //单元项数据块、长度







Automation类代码
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Data;
using System.IO;
public class Automation
{
public Automation()
{
OPCServer = new OPCAutomation.OPCServerClass();
}
private OPCAutomation.OPCServerClass OPCServer; //OPC Server通讯对象
private OPCAutomation.OPCGroup opcGroup; //OPC Server组对象
private Hashtable opcHash; //存储OPC Server信息哈希表
private Hashtable groupHash; //OPC Server组信息哈希表
private Hashtable readHash; //读单元哈希表
private Hashtable writeHash; //写单元哈希表
private bool bInit = false; //初始化成功标志
private bool bConnect = false; //连接成功标志
private string lastErrInfo; //错误信息



public bool Init(string fileName) //初始化
{
try
{
if (!File.Exists(fileName))
{
stErrInfo = "配置文件不存在";
return false;
}

cfgFileName = fileName;
DataSet opcSet = GetCfgData("Config//OPC");
if (!opcSet.Tables.Contains("OPC"))
{
stErrInfo = "配置文件没有OPC结点";
return false;
}
if (!opcSet.Tables.Contains("OPCGroup"))
{
stErrInfo = "配置文件没有OPCGroup结点";
return false;
}
opcHash = new Hashtable();
opcHash.Add("OPCConnectString", opcSet.Tables["OPC"].Rows[0]["OPCConnectString"]);
opcHash.Add("OPCNode", opcSet.Tables["OPC"].Rows[0]["OPCNode"]);

groupHash = new Hashtable();
groupHash.Add("OPCGroupName", opcSet.Tables["OPCGroup"].Rows[0]["OPCGroupName"]);
groupHash.Add("OPCGroupString", opcSet.Tables["OPCGroup"].Rows[0]["OPCGroupString"]);
groupHash.Add("GroupDeadband", opcSet.Tables["OPCGroup"].Rows[0]["GroupDeadband"]);
groupHash.Add("GroupLocaleID", opcSet.Tables["OPCGroup"].Rows[0]["GroupLocaleID"]);
groupHash.Add("GroupUpdateRate", opcSet.Tables["OPCGroup"].Rows[0]["GroupUpdateRate"]);
groupHash.Add("GroupTimeBias", opcSet.Tables["OPCGroup"].Rows[0]["GroupTimeBias"]);
groupHash.Add("ISACTIVE", opcSet.Tables["OPCGroup"].Rows[0]["ISACTIVE"]);

int clientHandle = 0;
readHash = new Hashtable();
DataRow[] row = opcSet.Tables["OPCItem"].Select("RWType='0' AND ISACTIVE='1'");
for (int i = 0; i < row.Length; i++)
{
Item opcItem = new Item();
opcItem.OPCItemName = row[i]["OPCItemName"].ToString();
opcItem.IsActivue = row[i]["ISACTIVE"].ToString();
opcItem.OPCItemString = row[i]["OPCItemString"].ToString();
opcItem.ClientHandle = ++clientHandle;

readHash.Add(opcItem.OPCItemName, opcItem);
}

writeHash = new Hashtable();
row = opcSet.Tables["OPCItem"].Select("RWType='1' AND ISACTIVE='1'");
for (int i = 0; i < row.Length; i++)
{
Item opcItem = new Item();
opcItem.OPCItemName = row[i]["OPCItemName"].ToString();
opcItem.IsActivue = row[i]["ISACTIVE"].ToString();
opcItem.OPCItemString = row[i]["OPCItemString"].ToString();
opcItem.ClientHandle = ++clientHandle;

writeHash.Add(opcItem.OPCItemName, opcItem);
}

row = opcSet.Tables["OPCItem"].Select("RWType='2' AND ISACTIVE='1'");
for (int i = 0; i < row.Length; i++)
{
Item opcItem1 = new Item();

opcItem1.OPCItemName = row[i]["OPCItemName"].ToString();
opcItem1.IsActivue = row[i]["ISACTIVE"].ToString();
opcItem1.OPCItemString = row[i]["OPCItemString"].ToString();
opcItem1.ClientHandle = ++clientHandle;
writeHash.Add(opcItem1.OPCItemName, opcItem1);

Item opcItem2 = new Item();
opcItem2.OPCItemName = row[i]["OPCItemName"].ToString();
opcItem2.IsActivue = row[i]["ISACTIVE"].ToString();
opcItem2.OPCItemString = row[i]["OPCItemString"].ToString();
opcItem2.ClientHandle = ++clientHandle;
readHash.Add(opcItem2.OPCItemName, opcItem2);
}
}
catch (Exception e)
{
stErrInfo = e.Message;
return false;
}
bInit = true;
return true;
}



public bool Start()
{
if (!bInit)
{
stErrInfo = "初始化未完成，先执行Init操作";
return false;
}

try
{
string opcGroupString = groupHash["OPCGroupString"].ToString();
OPCServer.Connect(opcHash["OPCConnectString"].ToString(), opcHash["OPCNode"]);
//Group的默认死区，变化量超过死区后将会触发DataChange事件，合理的设置该值可以提高程序性能
OPCServer.OPCGroups.DefaultGroupDeadband = int.Parse(groupHash["GroupDeadband"].ToString());
//组（Group）的默认通信区域编号，如1024
OPCServer.OPCGroups.DefaultGroupLocaleID = int.Parse(groupHash["GroupLocaleID"].ToString());
//组（Group）的默认刷新率
OPCServer.OPCGroups.DefaultGroupUpdateRate = int.Parse(groupHash["GroupUpdateRate"].ToString());
//组（Group）的默认时间偏差
OPCServer.OPCGroups.DefaultGroupTimeBias = int.Parse(groupHash["GroupTimeBias"].ToString());
opcGroup = OPCServer.OPCGroups.Add(groupHash["OPCGroupName"].ToString());

opcGroup.IsActive = false;
opcGroup.IsSubscribed = false;

int clientHandle = 1;
OPCAutomation.OPCItems opcItems = opcGroup.OPCItems;
IDictionaryEnumerator ide = readHash.GetEnumerator();
while (ide.MoveNext())
{
Item item = ide.Value as Item;
if (item.IsActive)
{
opcItems.AddItem(opcGroupString + item.OPCItemString, clientHandle);
clientHandle++;
}
}

ide = writeHash.GetEnumerator();
while (ide

.MoveNext())
{
Item item = ide.Value as Item;
if (item.IsActive)
{
opcItems.AddItem(opcGroupString + item.OPCItemString, clientHandle);
clientHandle++;
}
}

opcGroup.DataChange += new OPCAutomation.DIOPCGroupEvent_DataChangeEventHandler(Automation_DataChange);

opcGroup.IsActive = true;
opcGroup.IsSubscribed = true;

}
catch (SystemException ex)
{
stErrInfo = ex.Message;
return false;
}
bConnect = true;
return true;
}




5.Automation类其它方法

public DataSet GetCfgData(string xmlPathNode) //查找数据，返回DataSet
{
DataSet ds = new DataSet();
XmlDocument objXmlDoc = new XmlDocument();
objXmlDoc.Load(cfgFileName);
StringReader read = new StringReader(objXmlDoc.SelectSingleNode(xmlPathNode).OuterXml);
ds.ReadXml(read);
return ds;
}

private void Automation_DataChange(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)
{

//此处代码省略，贴出来的代码已经完成最主要的功能

}

6.Group类代码
private string opcGroupName; //组定义名称
private string opcGroupString; //组连接串
private int groupDeadband; //默认死区
private int groupLocaleID; //通信区域编号
private int groupUpdateRate; //刷新率
private int groupTimeBias; //时间偏差
private string isActivue; //是否激活的值 0:未激活；1:激活
public string OPCGroupName
{
get { return opcGroupName; }
set { opcGroupName = value; }
}
public string OPCGroupString
{
get { return opcGroupString; }
set { opcGroupString = value; }
}
public int GroupDeadband
{
get { return groupDeadband; }
set { groupDeadband = value; }
}

public int GroupLocaleID
{
get { return groupLocaleID; }
set { groupLocaleID = value; }
}
public int GroupUpdateRate
{
get { return groupUpdateRate; }
set { groupUpdateRate = value; }
}
public int GroupTimeBias
{
get { return groupTimeBias; }
set { groupTimeBias = value; }
}

public string IsActivue
{
get { return isActivue; }
set { isActivue = value; }
}

public bool IsActive
{
get
{
if (isActivue.Equals("1"))
{
re

turn true;
}
return false;
}
}

7.Item类代码
private int clientHandle = 1; //指定单元的序号
private string isActivue = "1"; //是否激活的值 0:未激活；1:激活
private string opcItemName; //单元名称
private string opcItemString; //单元数据块

public int ClientHandle
{
get { return clientHandle; }
set { clientHandle = value; }
}

public string IsActivue
{
get { return isActivue; }
set { isActivue = value; }
}

public bool IsActive
{
get
{
if (isActivue.Equals("1"))
{
return true;
}
return false;
}
}

public string OPCItemName
{
get { return opcItemName; }
set { opcItemName = value; }
}
public string OPCItemString
{
get { return opcItemString; }
set { opcItemString = value; }
}