I've two questions relating to updating layers in the ArcMap TOC.
Question 1) I want to update a layer in the ArcMap TOC with a new selectionLayer of the same type. I have the code to generate the selectionLayer (an IFeatureLayer), but as you will see below, I am currently adding this into the TOC as a new layer.
I’m creating a selection layer from a Feature Layer using IFeatureLayerDefinition2.CreateSelectionLayer().
The input FeatureLayer is a IGDBRasterCatalogLayer:
ESRI.ArcGIS.Geodatabase.IRasterCatalog rasterCatalog = GeodatabaseUtilities.OpenFGDBRasterCatalog(Properties.Settings.Default.pathToRasterCatalog, Properties.Settings.Default.rasterCatalogName);
IFeatureClass rasterCatFeatureClass = rasterCatalog as IFeatureClass;
ESRI.ArcGIS.Carto.IGdbRasterCatalogLayer pGdbRastercatalogLayer = new GdbRasterCatalogLayerClass();
IFeatureSelection featSelection = pGdbRastercatalogLayer as IFeatureSelection;
featSelection.SelectionSet = pSelectionset;
IFeatureLayerDefinition2 pFeatLayerDef2 = pGdbRastercatalogLayer as IFeatureLayerDefinition2;
IFeatureLayer selectionLayer = pFeatLayerDef2.CreateSelectionLayer("Test", true, "", "");
selectionLayer.Name = layerName;
This code works, and I can add the resulting Feature Layer (selectionLayer in above code) to the ArcMap TOC using:
ESRI.ArcGIS.Carto.IMap map = GetMapFromArcMap(ArcMap.Application);
Whilst this works, it would be far better to be able to assign the IFeatureLayer object to the existing ILayer in the TOC, but I can’t see how. It would be great if someone can indicate how to achieve this.
Question 2) A separate but related question: If I fix a broken data source using the ArcMap UI on a selection layer, the selectionset persists. When I try this with the following code, the layers data source is fixed, but all features from the new data source are returned, instead of just the selection set.
IFeatureLayer featureLayer = (IFeatureLayer)layerInTOC;
// Change FeatureClass of layer
featureLayer.FeatureClass = newFeatureClass;
So it would be great to hear how to fix the selection layer data source and keep the selectionSet?
Environment: ArcGIS Basic 10.2 desktop, Windows 7, C#, ArcObjects