public bool Read(OPCDataSource p_Src, int[] p_ArrHSrv, out OPCItemState[] p_ArrStat)
{
p_ArrStat = null;
int l_Count = p_ArrHSrv.Length;
IntPtr l_PtrStat;
IntPtr l_PtrErr;
int l_HResult = m_IfSync.Read(p_Src, l_Count, p_ArrHSrv, out l_PtrStat, out l_PtrErr);
if (HResults.Failed(l_HResult))
{
Marshal.ThrowExceptionForHR(l_HResult);
}
int l_RunErr = (int)l_PtrErr;
int l_RunStat = (int)l_PtrStat;
if ((l_RunErr == 0) || (l_RunStat == 0))
{
Marshal.ThrowExceptionForHR(HResults.E_ABORT);
}
p_ArrStat = new OPCItemState[l_Count];
for (int i = 0; i < l_Count; ++i)
{
p_ArrStat[i] = new OPCItemState();
p_ArrStat[i].Error = Marshal.ReadInt32((IntPtr)l_RunErr);
l_RunErr += 4;
p_ArrStat[i].HandleClient = Marshal.ReadInt32((IntPtr)l_RunStat);
if (HResults.Succeeded(p_ArrStat[i].Error))
{
short l_VT = Marshal.ReadInt16((IntPtr)(l_RunStat + 16));
if (l_VT == (short)VarEnum.VT_ERROR)
{
p_ArrStat[i].Error = Marshal.ReadInt32((IntPtr)(l_RunStat + 24));
}
p_ArrStat[i].Timestamp = Marshal.ReadInt64((IntPtr)(l_RunStat + 4));
p_ArrStat[i].Quality = Marshal.ReadInt16((IntPtr)(l_RunStat + 12));
p_ArrStat[i].DataValue = Marshal.GetObjectForNativeVariant((IntPtr)(l_RunStat + 16));
DummyVariant.VariantClear((IntPtr)(l_RunStat + 16));
}
else
{
p_ArrStat[i].DataValue = null;
}
l_RunStat += 32;
}
Marshal.FreeCoTaskMem(l_PtrStat);
Marshal.FreeCoTaskMem(l_PtrErr);
return(l_HResult == HResults.S_OK);
}
public void Next(int l_EnumCountMax, out OPCItemAttributes[] l_Attributes)
{
l_Attributes = null;
IntPtr l_PtrAtt;
int l_Count;
m_IfEnum.Next(l_EnumCountMax, out l_PtrAtt, out l_Count);
int l_RunAtt = (int)l_PtrAtt;
if ((l_RunAtt == 0) || (l_Count <= 0) || (l_Count > l_EnumCountMax))
{
return;
}
l_Attributes = new OPCItemAttributes[l_Count];
IntPtr l_PtrString;
for (int i = 0; i < l_Count; ++i)
{
l_Attributes[i] = new OPCItemAttributes();
l_PtrString = (IntPtr)Marshal.ReadInt32((IntPtr)l_RunAtt);
l_Attributes[i].AccessPath = Marshal.PtrToStringUni(l_PtrString);
Marshal.FreeCoTaskMem(l_PtrString);
l_PtrString = (IntPtr)Marshal.ReadInt32((IntPtr)(l_RunAtt + 4));
l_Attributes[i].ItemID = Marshal.PtrToStringUni(l_PtrString);
Marshal.FreeCoTaskMem(l_PtrString);
l_Attributes[i].Active = (Marshal.ReadInt32((IntPtr)(l_RunAtt + 8)) != 0);
l_Attributes[i].HandleClient = Marshal.ReadInt32((IntPtr)(l_RunAtt + 12));
l_Attributes[i].HandleServer = Marshal.ReadInt32((IntPtr)(l_RunAtt + 16));
l_Attributes[i].AccessRights = (OPCAccessRights)Marshal.ReadInt32((IntPtr)(l_RunAtt + 20));
l_Attributes[i].RequestedDataType = (VarEnum)Marshal.ReadInt16((IntPtr)(l_RunAtt + 32));
l_Attributes[i].CanonicalDataType = (VarEnum)Marshal.ReadInt16((IntPtr)(l_RunAtt + 34));
l_Attributes[i].EUType = (OPCEuType)Marshal.ReadInt32((IntPtr)(l_RunAtt + 36));
l_Attributes[i].EUInfo = Marshal.GetObjectForNativeVariant((IntPtr)(l_RunAtt + 40));
DummyVariant.VariantClear((IntPtr)(l_RunAtt + 40));
int ptrblob = Marshal.ReadInt32((IntPtr)(l_RunAtt + 28));
if (ptrblob != 0)
{
int l_BlobSize = Marshal.ReadInt32((IntPtr)(l_RunAtt + 24));
if (l_BlobSize > 0)
{
l_Attributes[i].Blob = new byte[l_BlobSize];
Marshal.Copy((IntPtr)ptrblob, l_Attributes[i].Blob, 0, l_BlobSize);
}
Marshal.FreeCoTaskMem((IntPtr)ptrblob);
}
l_RunAtt += 56;
}
Marshal.FreeCoTaskMem(l_PtrAtt);
}
public bool GetItemProperties(string p_ItemID, int[] p_PropertyIDs, out OPCPropertyData[] p_PropertiesData)
{
p_PropertiesData = null;
int l_Count = p_PropertyIDs.Length;
if (l_Count < 1)
{
return(false);
}
IntPtr l_PtrDat;
IntPtr l_PtrErr;
int l_HResult = m_IfItmProps.GetItemProperties(p_ItemID, l_Count, p_PropertyIDs, out l_PtrDat, out l_PtrErr);
if (HResults.Failed(l_HResult))
{
Marshal.ThrowExceptionForHR(l_HResult);
}
int l_RunDat = (int)l_PtrDat;
int l_RunErr = (int)l_PtrErr;
if ((l_RunDat == 0) || (l_RunErr == 0))
{
Marshal.ThrowExceptionForHR(HResults.E_ABORT);
}
p_PropertiesData = new OPCPropertyData[l_Count];
for (int i = 0; i < l_Count; ++i)
{
p_PropertiesData[i] = new OPCPropertyData();
p_PropertiesData[i].PropertyID = p_PropertyIDs[i];
p_PropertiesData[i].Error = Marshal.ReadInt32((IntPtr)l_RunErr);
l_RunErr += 4;
if (p_PropertiesData[i].Error == HResults.S_OK)
{
p_PropertiesData[i].Data = Marshal.GetObjectForNativeVariant((IntPtr)l_RunDat);
DummyVariant.VariantClear((IntPtr)l_RunDat);
}
else
{
p_PropertiesData[i].Data = null;
}
l_RunDat += DummyVariant.CONST_SIZE;
}
Marshal.FreeCoTaskMem(l_PtrDat);
Marshal.FreeCoTaskMem(l_PtrErr);
return(l_HResult == HResults.S_OK);
}
public override string ToString()
{
return("ID:" + PropertyID + " '" + Description + "' T:" + DummyVariant.VarEnumToString(DataType));
}
