i have already customized MsSql2008FeatureLayer, that allows the value of a field is updated on the fly. This feature Layer is corresponding to one sql table with spatial data and also other non-spatial attributes.
I know when the map bounding box changes, the featureLayer retrieves spatial features again.
In my case, for example, for a zipcode layer, i know which zipcode polygons should merge into one big one. How can i tell the FeatureLayer these merged polygons with attributes/styles to draw on map?
These merging information do not need to persist in the database. Users can change which zip code polygons to merge from other interface by choosing zip codes, for example.