virtual MgFeatureInformation* MgRenderingService::QueryFeatures	(	MgMap *	map,
		MgStringCollection *	layerNames,
		MgGeometry *	filterGeometry,
		INT32	selectionVariant,
		CREFSTRING	featureFilter,
		INT32	maxFeatures,
		INT32	layerAttributeFilter
	)		[pure virtual]

The QueryFeatures operation identifies those features that meet the specified spatial selection criteria. This operation is used to implement server-side selection. In addition to a selection set, this operation returns attribute information in case only one feature is selected.

Parameters:

map	Input map object containing current state of map.
layerNames	Input Active layer names for which to query features
filterGeometry	Input geometry object specifying the selection area
selectionVariant	Input selection criterion - integer value corresponding to one of the MgFeatureSpatialOperations values
featureFilter	Input an XML selection string containing the required feature IDs
maxFeatures	Input the maximum number of features to return
layerAttributeFilter	Input bitmask values - 1=Visible, 2=Selectable, 4=HasTooltips

Returns:

An MgSelection instance identifying the features that meet the selection criteria. Returns null if no features are identified.

Since:

1.2