public static List <OPCServer> BrowseServers(string hostname, NetworkCredential networkCredential = null, bool DAVersion3 = false)
{
List <OPCServer> servers = new List <OPCServer>();
Guid clsidcat;
if (DAVersion3)
{
clsidcat = new Guid("{CC603642-66D7-48F1-B69A-B625E73652D7}"); //OPC Data Access Servers Version 3.
}
else
{
clsidcat = new Guid("{63D5F432-CFE4-11D1-B2C8-0060083BA1FB}"); //OPC Data Access Servers Version 2.
}
Guid clsidenum = new Guid("{13486D51-4821-11D2-A494-3CB306C10000}"); //OPCEnum.exe
try
{
IOPCServerList2 serverList = (IOPCServerList2)Internal.Interop.CreateInstance(clsidenum, hostname, networkCredential);
IOPCEnumGUID pIOPCEnumGuid;
serverList.EnumClassesOfCategories(1, ref clsidcat, 0, ref clsidcat, out pIOPCEnumGuid);
string pszProgID;
string pszUserType;
string pszVerIndProgID;
Guid guid = new Guid();
int nServerCnt = 0;
uint iRetSvr;
pIOPCEnumGuid.Next(1, out guid, out iRetSvr);
while (iRetSvr != 0)
{
nServerCnt++;
serverList.GetClassDetails(ref guid, out pszProgID,
out pszUserType, out pszVerIndProgID);
OPCServer server = new OPCServer()
{
Guid = guid,
ProgId = pszProgID,
HostName = hostname,
};
servers.Add(server);
pIOPCEnumGuid.Next(1, out guid, out iRetSvr);
}
Internal.Interop.ReleaseServer(serverList);
}
catch (System.Exception ex)
{
Console.Out.WriteLine(ex.Message);
}
return(servers);
}
public static OPCServer FindServerByProgID(string progID, string hostname)
{
foreach (OPCServer srv in OPCServer.BrowseServers(hostname))
{
if (srv.ProgId.ToUpper().Contains(progID.ToUpper()))
{
return(srv);
}
}
return(null);
}
public void AdviseOnServer(OPCServer server, OPCItem item)
{
if (m_pItemMgt == null)
{
return;
}
try
{
IConnectionPointContainer pCPC;
pCPC = (IConnectionPointContainer)m_pItemMgt;
Guid riid = typeof(IOPCDataCallback).GUID;
//IEnumConnectionPoints ppEnum;
//pCPC.EnumConnectionPoints(out ppEnum);
pCPC.FindConnectionPoint(ref riid, out m_pDataCallback);
//Если ранее была активирована подписка, то отменить ее
if (m_dwCookie != 0)
{
m_pDataCallback.Unadvise(m_dwCookie);
}
DataCallback m_pSink = new DataCallback(item);
m_pDataCallback.Advise(m_pSink, out m_dwCookie);
}
catch (COMException ex)
{
string msg;
//Запрашиваем у сервера текст ошибки, соответствующий текущему HRESULT
server.Server.GetErrorString(ex.HResult, 2, out msg);
Console.Out.WriteLine(msg, "Ошибка");
}
catch (ServerException ex)
{
string msg;
//Запрашиваем у сервера текст ошибки, соответствующий текущему HRESULT
server.Server.GetErrorString(ex.HResult, 2, out msg);
Console.Out.WriteLine(msg, "Ошибка");
}
}