public bool AddItems(OPCItemDef[] arrDef, out OPCItemResult[] arrRes)
{
arrRes = null;
bool hasblobs = false;
int count = arrDef.Length;
IntPtr ptrDef = Marshal.AllocCoTaskMem(count * sizeOPCITEMDEF);
int runDef = (int)ptrDef;
OPCITEMDEFintern idf = new OPCITEMDEFintern();
idf.wReserved = 0;
foreach (OPCItemDef d in arrDef)
{
idf.szAccessPath = d.AccessPath;
idf.szItemID = d.ItemID;
idf.bActive = d.Active;
idf.hClient = d.HandleClient;
idf.vtRequestedDataType = (short)d.RequestedDataType;
idf.dwBlobSize = 0; idf.pBlob = IntPtr.Zero;
if (d.Blob != null)
{
idf.dwBlobSize = d.Blob.Length;
if (idf.dwBlobSize > 0)
{
hasblobs = true;
idf.pBlob = Marshal.AllocCoTaskMem(idf.dwBlobSize);
Marshal.Copy(d.Blob, 0, idf.pBlob, idf.dwBlobSize);
}
}
Marshal.StructureToPtr(idf, (IntPtr)runDef, false);
runDef += sizeOPCITEMDEF;
}
IntPtr ptrRes;
IntPtr ptrErr;
int hresult = ifItems.AddItems(count, ptrDef, out ptrRes, out ptrErr);
runDef = (int)ptrDef;
if (hasblobs)
{
for (int i = 0; i < count; i++)
{
IntPtr blob = (IntPtr)Marshal.ReadInt32((IntPtr)(runDef + 20));
if (blob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(blob);
}
Marshal.DestroyStructure((IntPtr)runDef, typeOPCITEMDEF);
runDef += sizeOPCITEMDEF;
}
}
else
{
for (int i = 0; i < count; i++)
{
Marshal.DestroyStructure((IntPtr)runDef, typeOPCITEMDEF);
runDef += sizeOPCITEMDEF;
}
}
Marshal.FreeCoTaskMem(ptrDef);
if (HRESULTS.Failed(hresult))
{
Marshal.ThrowExceptionForHR(hresult);
}
int runRes = (int)ptrRes;
int runErr = (int)ptrErr;
if ((runRes == 0) || (runErr == 0))
{
Marshal.ThrowExceptionForHR(HRESULTS.E_ABORT);
}
arrRes = new OPCItemResult[count];
for (int i = 0; i < count; i++)
{
arrRes[i] = new OPCItemResult();
arrRes[i].Error = Marshal.ReadInt32((IntPtr)runErr);
if (HRESULTS.Failed(arrRes[i].Error))
{
continue;
}
arrRes[i].HandleServer = Marshal.ReadInt32((IntPtr)runRes);
arrRes[i].CanonicalDataType = (VarEnum)(int)Marshal.ReadInt16((IntPtr)(runRes + 4));
arrRes[i].AccessRights = (OPCACCESSRIGHTS)Marshal.ReadInt32((IntPtr)(runRes + 8));
int ptrblob = Marshal.ReadInt32((IntPtr)(runRes + 16));
if ((ptrblob != 0))
{
int blobsize = Marshal.ReadInt32((IntPtr)(runRes + 12));
if (blobsize > 0)
{
arrRes[i].Blob = new byte[blobsize];
Marshal.Copy((IntPtr)ptrblob, arrRes[i].Blob, 0, blobsize);
}
Marshal.FreeCoTaskMem((IntPtr)ptrblob);
}
runRes += sizeOPCITEMRESULT;
runErr += 4;
}
Marshal.FreeCoTaskMem(ptrRes);
Marshal.FreeCoTaskMem(ptrErr);
return(hresult == HRESULTS.S_OK);
}
public void Connect()
{
int i;
try
{
#if CREDENTIALS
LogMessage("Test if CNC Exe IsExecuting()", 1);
if ((sCNCProcessName.Length > 0) && !IsExecuting(sOPCMachine, sCNCProcessName))
{
throw new Exception("Cannot start OPC Server" + sCNCProcessName + " not running");
}
LogMessage("Connect to CNC", 1);
// This is used as credentials to logon ont remote pc to see if CNC running
System.Net.NetworkCredential credential;
if (sDomain.Length > 0)
{
credential = new System.Net.NetworkCredential(sUser, sPassword, sDomain);
}
else
{
credential = new System.Net.NetworkCredential(sUser, sPassword); // , sDomain);
}
#endif
_opcserver = new OpcServer();
LogMessage("Attempt OPC Server Connection", Logger.DEBUG);
// _opcserver will be null if failed...
_opcserver.Connect(this.clsid, this.sIpAddress);
LogMessage("Create OPC Group", Logger.DEBUG);
opcgroup = _opcserver.AddGroup("OPCCSharp-Group", false, 900);
if (opcgroup == null)
{
throw new Exception("Connect - AddGroup failed");
}
// FIXME: this only works if OPC item exists.
// Add items to OPC Group
LogMessage("Add OPC Items", Logger.DEBUG);
OPCItemResult[] itemresult;
opcgroup.AddItems(tags, out itemresult);
if (itemresult == null)
{
throw new Exception("Connect - OPC AddItems failed");
}
LogMessage("Check OPC items for errors.", Logger.DEBUG);
for (i = 0; i < itemresult.Length; i++)
{
// If the OPC item failed - remove it from the tags to be updated.
if (HRESULTS.Failed(itemresult[i].Error))
{
LogMessage("OPC AddItems Error: " + tags[i].ItemID, Logger.DEBUG);
itemresult = (OPCItemResult[])RemoveAt(itemresult, i);
tags = (OPCItemDef[])RemoveAt(tags, i);
handlesSrv = (int[])RemoveAt(handlesSrv, i);
continue;
}
handlesSrv[i] = itemresult[i].HandleServer;
}
// read group
LogMessage("OPC ReadStatus", Logger.DEBUG);
ReadStatus();
LogMessage("OPC ReadGroup", Logger.DEBUG);
ReadGroup();
}
catch (Exception e)
{
LogMessage("OPC Connect Error: " + e.Message, Logger.ERROR);
Disconnect();
}
}