Need a piece of code to check FeatureLayer and more ...

Question

I need a piece of code to check if a layer in ArcMap is a FeautureLayer.

IMap pMap = m_mxDoc.FocusMap;
                for (int i = 0; i < m_mxDoc.Maps.Count; i++) {
                    ILayer pLayer = pMap.Layer;
                    //if (typeof(pMap.Layer) is IFeatureLayer )   ???  How to code here?

Appreciate if you can help.

ShaningYu · Answer

Revised the code as:

if (m_Map.Layer is IFeatureLayer) { ... }

No need to use typeof(...)   Thanks.

AllanMills · Answer

You'd be better of enumerating the layers to only get feature layers. For the above code, when you convert it to a .NET equivalent you can provide an ID to the layers command:

Dim pId As New UID
 pId.Value = "{40A9E885-5533-11d0-98BE-00805F7CED21}"
 Dim pEnumLayers As IEnumLayer = pMap.Layers(pId, True)

The pId value tells Arc what kind of layers to look for. This page: ArcObjects Help for .NET developers tells you the GUID values for different data types.

Hornbydd · Answer

Here is some code in VBA that shows you how to test if object is of type IFeatureLayer Public Sub test() Dim pMxDoc As IMxDocument Set pMxDoc = ThisDocument Dim pMap As IMap Set pMap = pMxDoc.FocusMap Dim pEnumLayers As IEnumLayer Set pEnumLayers = pMap.Layers Dim pLayer As ILayer Set pLayer = pEnumLayers.Next Do While Not (pLayer Is Nothing) If TypeOf pLayer Is IFeatureLayer Then Debug.Print "FeatureLayer found!" End If Set pLayer = pEnumLayers.Next Loop End Sub‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍