Provides access to members that control the behavior and properties of a feature class representation.

Product Availability

When To Use

Use IRepresentationClass to access a feature class representation to either view, copy, or make changes to RepresentationRules, GraphicAttributes and RequireShapeOverride properties.

Members

	All Properties Methods	Description
	FeatureClass	Feature class associated with this representation class.
	GetRepresentation	Returns the representation of a given feature.
	GraphicAttributes	Class attributes Property.
	ID	ID of the representation class.
	OverrideFieldIndex	Field index of the override field.
	PrepareFilter	Adds the fields used by overrides to the query filter.
	RepresentationRules	RepresentationRules Property.
	RequireShapeOverride	Indicates if a shape override is required for feature representations.
	RuleIDFieldIndex	Field index of the Rule ID field.

CoClasses that implement IRepresentationClass

Remarks

IRepresentationClass interface has properties and methods used to manage the ReresentationClass object. 

A RepresentationClass is a feature class that has been enabled with representation capability. Creating a new feature class representation will result in addition of two new fields corresponding to the RuleID and Override fields. RuleID fIeld stores ID values of representation rules which are used to represent individual feature representations. Override field contains information about representation overrides. Default values for overrides are set to null. RuleIDFieldIndex and OverrideFieldIndex properties return field indices for RuleID and Override fields respectively.

FeatureClass property returns a reference to the feature class that the representation class belongs to. A representation class cannot exist on its own. Deleting a feature class will delete all representation classes associated with it. Drop Representation geoprocessing tool can be used to remove feature class representations.

RepresentationRules property can be used to access the collection of representation rules present for a representation class or to create a new representation rules object from scratch. A single representation class can have multiple representation rules.

GraphicAttributes property returns a reference to the graphic attributes present for the representation class namely, visibility. To make changes to this property use IGraphicAttributes interface. Changes made at representation class level are applied to all representations. Individual representation's visibility property can also be overriden using IRepresentation::Value property.

Use GetRepresentation method to get access to representations for individual features within the feature class with respect to a specific MapContext object listed in the esriDisplay library. A MapContext object is defined using Spatial Reference and Reference Scale information.

PrepareFilter method prepares a query filter by adding RuleID, Override and explicit override fields as the sub-fields. 

IMxDocument pMxDoc ;
pMxDoc = m_App.Document;
IMap pMap;
pMap = pMxDoc.FocusMap;
IFeatureLayer pFeatLayer;
pFeatLayer = (IFeatureLayer)pMap.get_Layer(0);
IGeoFeatureLayer pGeoFeatLayer;
pGeoFeatLayer = (IGeoFeatureLayer)pFeatLayer;
IRepresentationRenderer pRepRenderer; 
IRepresentationClass pRepClasss;
if (typeof(pGeoFeatLayer) is IRepresentationRenderer)
{
  pRepRenderer = (IRepresentationRenderer)pGeoFeatLayer.Renderer; 
  pRepClasss = pRepRenderer.RepresentationClass;
}

  Dim pMxDoc as IMxDocument 
  Set pMxDoc = ThisDocument
  Dim pMap as IMap
  Set pMap = pMxDoc.FocusMap
  Dim pFeatLayer as IFeatureLayer
  Set pFeatLayer = pMap.Layer(0)
  Dim pGeoFeatLayer as IGeoFeatureLayer
  Set pGeoFeatLayer = pFeatLayer
  Dim pRepRenderer as IRepresentationRenderer
  Dim pRepClass as IRepresentationClass
  If TypeOf pGeoFeatLayer is RepresentationRenderer then 
      Set pRepRenderer = pGeoFeatLayer.Renderer
      Set pRepClass = pRepRenderer.RepresentationClass
  End If 

  Dim pRepWSExt as IRepresentationWorkspaceExtension
  Dim pRepClass as IRepresentationClass
  Dim pDataset As IDataset
  Dim pWorkspace As IWorkspace
  Dim pExtManager As IWorkspaceExtensionManager
  Dim pUID As IUID
  
  Set pDataset = pfclass
  Set pWorkspace = pDataset.Workspace
  Set pExtManager = pWorkspace
  Set pUID = New UID
  pUID.Value = "{FD05270A-8E0B-4823-9DEE-F149347C32B6}"
  Set pRepWSExt = pExtManager.FindExtension(pUID)
  Set pRepClass = pRepWSExt.OpenRepresentationClass("River_Rep")
  

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