topic How to get IFeatureclass from ILayer in ArcObjects SDK Questions

How to get IFeatureclass from ILayer

pavan_kumarmuttigi — Wed, 06 Mar 2013 10:32:31 GMT

Hi,

Can any one help me in getting the IFeatureClass from ILayer instance?

Thanks in Advance

Re: How to get IFeatureclass from ILayer

LeoDonahue — Wed, 06 Mar 2013 12:09:02 GMT

FeatureLayer implements ILayer, and it has a getFeatureClass() method that returns IFeatureClass.

Or are you asking how to get ILayer from a layer in a mxd or on disk?

Re: How to get IFeatureclass from ILayer

JasonPike — Sat, 11 Dec 2021 20:45:13 GMT

Like Leo said, something like this should do it:

public IFeatureClass GetFeatureClassFromLayer(ILayer layer)
{
    IFeatureLayer featureLayer = null;
    IFeatureClass featureClass = null;
    
    if( null != (featureLayer = layer as IFeatureLayer))
    {
        featureClass = featureLayer.FeatureClass;
    }

    return featureClass;
}

I didn't plug that into an IDE to check for syntax mistakes, but that should get you started. Also, be sure to check your results for null. All IFeatureLayer instances are ILayer, but not all ILayer instances are IFeatureLayer.

Re: How to get IFeatureclass from ILayer

LeoDonahue — Wed, 06 Mar 2013 13:09:52 GMT

Not all implementing classes of ILayer have the ability to return the FeatureClass either.