topic Re: How to get the geometry from an ILayer object in C# in ArcObjects SDK Questions

How to get the geometry from an ILayer object in C#

ReneeCammarere — Thu, 03 Mar 2011 19:28:52 GMT

From reading the documentation, I assumed that this was the way to accomplish that. However, I got an error when I tried to cast an ILayer object to an IFeatureLayer object. This is the snippit of code:

ILayer pLayer = aMap.get_Layer(layercount - 1);
IFeatureLayer pFeatureLayer = (IFeatureLayer)pLayer;
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFeature pFeature = pFeatureClass.CreateFeature();
IGeometry pGeometry = pFeature.Shape;

Re: How to get the geometry from an ILayer object in C#

BradChappell — Fri, 04 Mar 2011 13:21:47 GMT

What type of layer is it? Some layer types do not implement IFeatureLayer; e.g. Raster Layer

Re: How to get the geometry from an ILayer object in C#

BrianBottoms — Mon, 07 Mar 2011 13:47:37 GMT

Just to build on what was already said, you need to check if your ILayer is a 'TypeOf' IFeatureLayer

If this returns true then you can check the featureclass ShapeType property.

Brian