A container that references a data layer containing network locations.
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Extended Error Information
Use the ISupportErrorInfo method InterfaceSupportsErrorInfo to determine if the object supports extended error information. If the object supports extended error info, VC++ developers should use the OLE/COM IErrorInfo interface to access the ErrorInfo object. Visual Basic developers should use the global error object Err to retrieve this extended error information.
Interfaces
| Interfaces | Description |
|---|---|
| INAServerDataLayer | Provides access to a data layer containing network locations. |
| INAServerLocations | Provides access to objects that can be used to load network locations in NAServer. |
| INAServerLocations2 | Provides access to objects that can be used to load network locations in NAServer. |
| IPersist | Defines the single method GetClassID, which is designed to supply the CLSID of an object that can be stored persistently in the system. IPersist is the base interface for three other interfaces: IPersistStorage, IPersistStream, and IPersistFile. |
| IPersistStream (esriSystem) | |
| ISupportErrorInfo | Indicates whether a specific interface can return Automation error objects. |
| IXMLSerialize (esriSystem) | Provides access to members that XML serialize and deserialize an object to/from XML. |
| IXMLVersionSupport (esriSystem) | Provides access to members that help in serializing an object to different namespaces (versions). |
Remarks
The NAServerDataLayer object is used to load network locations.
The NAServerDataLayer object implements the INAServerDataLayer interface and can be passed in to any of the properties of the NAServerSolverParams objects that expect an INAServerLocations interface pointer. For example, Stops, Barriers, Facilities, or Incidents.
If the data layer contains the network location fields "SourceID" (int), "SourceOID" (int), "PosAlong" (double), and "SideOfEdge" (int) the values in these fields will specify the network location rather than performing a spatial search to determine the network location.
Any other fields can be in the data layer may be used when loading network locations. What fields map to NAClass fields is a function of INAServerSolverParams.NAClassCandidateFieldMaps .