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AcMapLayer:: SelectAggregate Method
Selects groups of features from a feature source and applies filters to each of the groups according to the criteria set in the MgFeatureAggregateOptions argument.
MgDataReader* SelectAggregate(
MgFeatureAggregateOptions* options
);|
Parameters |
Description |
|
options |
An MgFeatureAggregateOptions instance containing all the criteria and filters required for this select operation. |
Returns
Returns an MgDataReader containing the group values.
Remarks
If you want to apply the criteria to all features without grouping them, use the MgLayerBase::SelectFeatures Method.
MgXX classes belong to the OsGeo.MapGuide namespace and are descibed in the Geospatial Platform Reference.
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