ArcObjects Library Reference  (NetworkAnalyst)    

NACandidateFieldMap CoClass

Field Map holding default value and candidate fields.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. Requires Network Analyst Extension.

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 Description
INACandidateFieldMap Provides access to the default value and candidate fields for a field in an NAClass.
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).


The NACandidateFieldMap object is used to specify the default value and candidate field names for a particular field in an NAClass.  

An NAClassCandidateFieldMap object holds an array of NACandidateFieldMap objects. 

Within INAServer::Solve the information provided by INACandidateFieldMap is applied to an NAClassFieldMap object prior to loading network locations to specify the values of the network locations based on these default values and candidate fields.