ILayerDescription3 Interface

Provides access to the available properties of a layer description object.

Product Availability

Description

This interface is new at ArcGIS 9.3. It supersedes ILayerDescription and ILayerDescription2.

Members

	Name	Description
	DefinitionExpression	The definition expression for the layer.
	ID	The layer ID. This is a unique ID for the layer, and is used to identify the layer in a number of method calls.
	LayerResultOptions	Indicate whether to include and/or modify Geometry.
	ScaleSymbols	Indicates whether the layer should scale its symbols according to the reference scale.
	SelectionBufferDistance	The selection buffer distance. When drawing, and if a selection filter is specified, a buffer zone of the specified distance will be displayed around the selected features.
	SelectionBufferSymbol	Symbol used for drawing selection buffer.
	SelectionColor	The selection color (used when SetSelectionSymbol = FALSE).
	SelectionFeatures	Array of selected features.
	SelectionSymbol	The selection symbol.
	SetSelectionSymbol	Indicates if the selected set of features is drawn using the SelectionSymbol.
	ShowLabels	Indicates whether the layer should display its dynamic labels.
	ShowSelectionBuffer	Indicates whether the selection buffer should be displayed.
	SourceID	The id of the source to use when drawing the layer.
	Visible	Indicates whether the layer is visible as defined in the TOC (i.e. marked on).

Inherited Interfaces

Classes that implement ILayerDescription3

Remarks

Please note the difference of use between IMapLayerInfo and ILayerDescription: Use ILayerDescription to access layer settings that can be changed on the server object without changing the state of the underlying fine-grained ArcObjects that the layer is based on. MapLayerInfo is used to retrieve information about a layer that can only be changed by directly accessing the map document or the fine-grained ArcObjects it is based on.

Use LayerResultOptions when you want to customize a query result.

Layer settings of the Server object can be permanently changed by accessing fine-grained ArcObjects. This is accomplished using IMapServerObjects. This should be done with objects in a non-pooled environment.  Changing the state of pooled objects this way will lead to unexpected results. Changes made using IMapServerObjects reside in memory only. They affect only the instance of the map service being accessed. They do not change anything in the original map document (.mxd) saved on disk. These changes exist until the service is restarted or recycled.