Namespace: Opc.UaFx.Services
Assemblies: Opc.UaFx.Advanced.dll, Opc.UaFx.Advanced.dll
The IOpcReadNodesHistoryService interface defines the following members.
Gets or sets the OpcTimestampsToReturn to use to request historical data from the server.
C#
OpcTimestampsToReturn? TimestampsToReturn { get; set; }
Property Value
Nullable<OpcTimestampsToReturn>
One of the members defined by the OpcTimestampsToReturn enumeration; otherwise a null reference (Nothing in Visual Basic). In case there the value is a null reference (Nothing in Visual Basic) the TimestampsToReturn of the OpcReadNodesHistoryRequest to process is used. The default value of this property is a null reference (Nothing in Visual Basic).
C#
HistoryReadResultCollection ReadNodesHistory(OpcReadHistoryDetails details, params HistoryReadValueId[] nodesToRead)
Parameters
details
OpcReadHistoryDetails
nodesToRead
HistoryReadValueId[]
Returns
Exceptions
C#
HistoryReadResultCollection ReadNodesHistory(OpcReadHistoryDetails details, IEnumerable<HistoryReadValueId> nodesToRead)
Parameters
details
OpcReadHistoryDetails
nodesToRead
IEnumerable<HistoryReadValueId>
Returns
Exceptions
C#
HistoryReadResultCollection ReadNodesHistoryModified(OpcReadHistoryDetails details, params HistoryReadValueId[] nodesToRead)
Parameters
details
OpcReadHistoryDetails
nodesToRead
HistoryReadValueId[]
Returns
Exceptions
C#
HistoryReadResultCollection ReadNodesHistoryModified(OpcReadHistoryDetails details, IEnumerable<HistoryReadValueId> nodesToRead)
Parameters
details
OpcReadHistoryDetails
nodesToRead
IEnumerable<HistoryReadValueId>
Returns
Exceptions