Opc.Ua.Com.Client.ComDaGroup.ActivateItems C# (CSharp) Method

        public void ActivateItems(bool active)
        {
            // count the number of items to activate.
            List<GroupItem> itemsToActivate = new List<GroupItem>();

            lock (Lock)
            {
                for (int ii = 0; ii < m_items.Count; ii++)
                {
                    if (m_items[ii].ActiveChanged && m_items[ii].Active == active && m_items[ii].Created)
                    {
                        itemsToActivate.Add(m_items[ii]);
                    }
                }
            }

            // check if nothing to do.
            if (itemsToActivate.Count == 0)
            {
                return;
            }

            // build list of items to remove.
            int count = itemsToActivate.Count;
            int[] serverHandles = new int[count];

            for (int ii = 0; ii < itemsToActivate.Count; ii++)
            {
                serverHandles[ii] = itemsToActivate[ii].ServerHandle;
            }

            // initialize output parameters.
            IntPtr pErrors = IntPtr.Zero;

            string methodName = "IOPCItemMgt.SetActiveState";

            try
            {
                IOPCItemMgt server = BeginComCall<IOPCItemMgt>(methodName, true);

                server.SetActiveState(
                    count,
                    serverHandles,
                    (active) ? 1 : 0,
                    out pErrors);
            }
            catch (Exception e)
            {
                ComUtils.TraceComError(e, methodName);

                for (int ii = 0; ii < itemsToActivate.Count; ii++)
                {
                    itemsToActivate[ii].ActiveChanged = false;
                    itemsToActivate[ii].ErrorId = Marshal.GetHRForException(e);
                }
            }
            finally
            {
                EndComCall(methodName);
            }

            // free returned error array.
            int[] errors = ComUtils.GetInt32s(ref pErrors, count, true);

            // save error codes.
            for (int ii = 0; ii < count; ii++)
            {
                itemsToActivate[ii].ActiveChanged = false;
                itemsToActivate[ii].ErrorId = errors[ii];
            }

            /*
            Utils.Trace(
                "Group {0} ActivateItems({4}/{5}) {1}/{2}ms {3}%",
                m_clientHandle,
                m_samplingInterval,
                m_actualSamplingInterval,
                m_deadband,
                active,
                itemsToActivate.Count);
            */
        }