// ------------------------ IOPCItemProperties ---------------
public void QueryAvailableProperties(string itemID, out OPCProperty[] opcProperties)
{
opcProperties = null;
int count = 0;
IntPtr ptrID;
IntPtr ptrDesc;
IntPtr ptrTyp;
ifItmProps.QueryAvailableProperties(itemID, out count, out ptrID, out ptrDesc, out ptrTyp);
if ((count == 0) || (count > 10000))
{
return;
}
int runID = (int)ptrID;
int runDesc = (int)ptrDesc;
int runTyp = (int)ptrTyp;
if ((runID == 0) || (runDesc == 0) || (runTyp == 0))
{
Marshal.ThrowExceptionForHR(HRESULTS.E_ABORT);
}
opcProperties = new OPCProperty[count];
IntPtr ptrString;
for (int i = 0; i < count; i++)
{
opcProperties[i] = new OPCProperty();
opcProperties[i].PropertyID = Marshal.ReadInt32((IntPtr)runID);
runID += 4;
ptrString = (IntPtr)Marshal.ReadInt32((IntPtr)runDesc);
runDesc += 4;
opcProperties[i].Description = Marshal.PtrToStringUni(ptrString);
Marshal.FreeCoTaskMem(ptrString);
opcProperties[i].DataType = (VarEnum)Marshal.ReadInt16((IntPtr)runTyp);
runTyp += 2;
}
Marshal.FreeCoTaskMem(ptrID);
Marshal.FreeCoTaskMem(ptrDesc);
Marshal.FreeCoTaskMem(ptrTyp);
}
// ------------------------ IOPCItemProperties ---------------
public void QueryAvailableProperties( string itemID, out OPCProperty[] opcProperties )
{
opcProperties = null;
int count = 0;
IntPtr ptrID;
IntPtr ptrDesc;
IntPtr ptrTyp;
ifItmProps.QueryAvailableProperties( itemID, out count, out ptrID, out ptrDesc, out ptrTyp );
if( (count == 0) || (count > 10000) )
return;
int runID = (int) ptrID;
int runDesc = (int) ptrDesc;
int runTyp = (int) ptrTyp;
if( (runID == 0) || (runDesc == 0) || (runTyp == 0) )
Marshal.ThrowExceptionForHR( HRESULTS.E_ABORT );
opcProperties = new OPCProperty[ count ];
IntPtr ptrString;
for( int i = 0; i < count; i++ )
{
opcProperties[i] = new OPCProperty();
opcProperties[i].PropertyID = Marshal.ReadInt32( (IntPtr) runID );
runID += 4;
ptrString = (IntPtr) Marshal.ReadInt32( (IntPtr) runDesc );
runDesc += 4;
opcProperties[i].Description = Marshal.PtrToStringUni( ptrString );
Marshal.FreeCoTaskMem( ptrString );
opcProperties[i].DataType = (VarEnum) Marshal.ReadInt16( (IntPtr) runTyp );
runTyp += 2;
}
Marshal.FreeCoTaskMem( ptrID );
Marshal.FreeCoTaskMem( ptrDesc );
Marshal.FreeCoTaskMem( ptrTyp );
}
