/// <remarks/>
public void Clone(out IEnumOPCItemAttributes ppEnumItemAttributes)
{
lock (m_lock)
{
try
{
ppEnumItemAttributes = new EnumOPCItemAttributes(m_items);
}
catch (Exception e)
{
throw ComUtils.CreateComException(e);
}
}
}
/// <remarks/>
public void Clone(out IEnumOPCItemAttributes ppEnumItemAttributes)
{
lock (m_lock)
{
try
{
ppEnumItemAttributes = new EnumOPCItemAttributes(m_items);
}
catch (Exception e)
{
throw ComUtils.CreateComException(e);
}
}
}
/// <summary>
/// IOPCItemMgt::CreateEnumerator - Creates an enumerator for the items in the group.
/// </summary>
public void CreateEnumerator(ref Guid riid, out object ppUnk)
{
lock (m_lock)
{
if (m_subscription == null) throw ComUtils.CreateComException(ResultIds.E_FAIL);
if (riid != typeof(OpcRcw.Da.IEnumOPCItemAttributes).GUID)
{
throw ComUtils.CreateComException(ResultIds.E_INVALIDARG);
}
try
{
List<EnumOPCItemAttributes.ItemAttributes> itemsToEnumerate = new List<EnumOPCItemAttributes.ItemAttributes>();
foreach (Item item in m_items.Values)
{
EnumOPCItemAttributes.ItemAttributes attributes = new EnumOPCItemAttributes.ItemAttributes();
attributes.ItemID = item.ItemId;
attributes.AccessPath = String.Empty;
attributes.ClientHandle = item.ClientHandle;
attributes.ServerHandle = item.ServerHandle;
attributes.Active = item.Active;
attributes.RequestedDataType = item.ReqType;
attributes.AccessRights = ComUtils.GetAccessRights(item.Variable.AccessLevel);
attributes.CanonicalDataType = m_server.DataTypeToVarType(item.Variable.DataType, item.Variable.ValueRank);
attributes.EuType = OpcRcw.Da.OPCEUTYPE.OPC_NOENUM;
attributes.MaxValue = 0;
attributes.MinValue = 0;
attributes.EuInfo = null;
if (attributes.CanonicalDataType == VarEnum.VT_VARIANT)
{
attributes.CanonicalDataType = VarEnum.VT_EMPTY;
}
// find euRange.
VariableNode euRange = m_session.NodeCache.Find(
item.Variable.NodeId,
ReferenceTypeIds.HasProperty,
false,
true,
Opc.Ua.BrowseNames.EURange) as VariableNode;
if (euRange != null)
{
attributes.EuType = OpcRcw.Da.OPCEUTYPE.OPC_ANALOG;
Range range = ExtensionObject.ToEncodeable(euRange.Value.Value as ExtensionObject) as Range;
if (range != null)
{
attributes.MaxValue = range.High;
attributes.MinValue = range.Low;
}
}
// find enumStrings.
VariableNode enumStrings = m_session.NodeCache.Find(
item.Variable.NodeId,
ReferenceTypeIds.HasProperty,
false,
true,
Opc.Ua.BrowseNames.EnumStrings) as VariableNode;
if (enumStrings != null)
{
attributes.EuType = OpcRcw.Da.OPCEUTYPE.OPC_ENUMERATED;
LocalizedText[] strings = enumStrings.Value.Value as LocalizedText[];
if (strings != null)
{
attributes.EuInfo = new string[strings.Length];
for (int ii = 0; ii < strings.Length; ii++)
{
attributes.EuInfo[ii] = strings[ii].Text;
}
}
}
// add item
itemsToEnumerate.Add(attributes);
}
// create enumerator.
ppUnk = new EnumOPCItemAttributes(itemsToEnumerate);
}
catch (Exception e)
{
throw ComUtils.CreateComException(e);
}
}
}