Exemplo n.º 1
0
        public void Next(int enumcountmax, out OPCItemAttributes[] attributes)
        {
            attributes = null;

            IntPtr ptrAtt;
            int    count;

            ifEnum.Next(enumcountmax, out ptrAtt, out count);
            int runatt = (int)ptrAtt;

            if ((runatt == 0) || (count <= 0) || (count > enumcountmax))
            {
                return;
            }

            attributes = new OPCItemAttributes[count];
            IntPtr ptrString;

            for (int i = 0; i < count; i++)
            {
                attributes[i] = new OPCItemAttributes();

                ptrString = (IntPtr)Marshal.ReadInt32((IntPtr)runatt);
                attributes[i].AccessPath = Marshal.PtrToStringUni(ptrString);
                Marshal.FreeCoTaskMem(ptrString);

                ptrString            = (IntPtr)Marshal.ReadInt32((IntPtr)(runatt + 4));
                attributes[i].ItemID = Marshal.PtrToStringUni(ptrString);
                Marshal.FreeCoTaskMem(ptrString);

                attributes[i].Active            = (Marshal.ReadInt32((IntPtr)(runatt + 8))) != 0;
                attributes[i].HandleClient      = Marshal.ReadInt32((IntPtr)(runatt + 12));
                attributes[i].HandleServer      = Marshal.ReadInt32((IntPtr)(runatt + 16));
                attributes[i].AccessRights      = (OPCACCESSRIGHTS)Marshal.ReadInt32((IntPtr)(runatt + 20));
                attributes[i].RequestedDataType = (VarEnum)Marshal.ReadInt16((IntPtr)(runatt + 32));
                attributes[i].CanonicalDataType = (VarEnum)Marshal.ReadInt16((IntPtr)(runatt + 34));

                attributes[i].EUType = (OPCEUTYPE)Marshal.ReadInt32((IntPtr)(runatt + 36));
                attributes[i].EUInfo = Marshal.GetObjectForNativeVariant((IntPtr)(runatt + 40));
                DUMMY_VARIANT.VariantClear((IntPtr)(runatt + 40));

                int ptrblob = Marshal.ReadInt32((IntPtr)(runatt + 28));
                if ((ptrblob != 0))
                {
                    int blobsize = Marshal.ReadInt32((IntPtr)(runatt + 24));
                    if (blobsize > 0)
                    {
                        attributes[i].Blob = new byte[blobsize];
                        Marshal.Copy((IntPtr)ptrblob, attributes[i].Blob, 0, blobsize);
                    }
                    Marshal.FreeCoTaskMem((IntPtr)ptrblob);
                }

                runatt += 56;
            }

            Marshal.FreeCoTaskMem(ptrAtt);
        }
        public void Next( int enumcountmax, out OPCItemAttributes[] attributes )
        {
            attributes = null;

            IntPtr	ptrAtt;
            int		count;
            ifEnum.Next( enumcountmax, out ptrAtt, out count );
            int	runatt = (int) ptrAtt;
            if( (runatt == 0) || (count <= 0) || (count > enumcountmax) )
            return;

            attributes = new OPCItemAttributes[ count ];
            IntPtr	ptrString;

            for( int i = 0; i < count; i++ )
            {
            attributes[i] = new OPCItemAttributes();

            ptrString = (IntPtr) Marshal.ReadInt32( (IntPtr) runatt );
            attributes[i].AccessPath = Marshal.PtrToStringUni( ptrString );
            Marshal.FreeCoTaskMem( ptrString );

            ptrString = (IntPtr) Marshal.ReadInt32( (IntPtr)(runatt + 4) );
            attributes[i].ItemID = Marshal.PtrToStringUni( ptrString );
            Marshal.FreeCoTaskMem( ptrString );

            attributes[i].Active			= (Marshal.ReadInt32( (IntPtr)(runatt + 8) )) != 0;
            attributes[i].HandleClient		= Marshal.ReadInt32( (IntPtr)(runatt + 12) );
            attributes[i].HandleServer		= Marshal.ReadInt32( (IntPtr)(runatt + 16) );
            attributes[i].AccessRights		= (OPCACCESSRIGHTS) Marshal.ReadInt32( (IntPtr)(runatt + 20) );
            attributes[i].RequestedDataType	= (VarEnum) Marshal.ReadInt16( (IntPtr)(runatt + 32) );
            attributes[i].CanonicalDataType	= (VarEnum) Marshal.ReadInt16( (IntPtr)(runatt + 34) );

            attributes[i].EUType			= (OPCEUTYPE) Marshal.ReadInt32( (IntPtr)(runatt + 36) );
            attributes[i].EUInfo			= Marshal.GetObjectForNativeVariant( (IntPtr)(runatt + 40) );
            DUMMY_VARIANT.VariantClear( (IntPtr) (runatt + 40) );

            int ptrblob	= Marshal.ReadInt32( (IntPtr)(runatt + 28) );
            if( (ptrblob != 0) )
                {
                int blobsize	= Marshal.ReadInt32( (IntPtr)(runatt + 24) );
                if( blobsize > 0 )
                    {
                    attributes[i].Blob = new byte[ blobsize ];
                    Marshal.Copy( (IntPtr) ptrblob, attributes[i].Blob, 0, blobsize );
                    }
                Marshal.FreeCoTaskMem( (IntPtr) ptrblob );
                }

            runatt += 56;
            }

            Marshal.FreeCoTaskMem( ptrAtt );
        }