topic Re: How to add Layers using IEnumLayer for autoArrange in ArcObjects SDK Questions

How to add Layers using IEnumLayer for autoArrange

SumitSharma — Tue, 04 Sep 2012 16:46:38 GMT

The following code help to add layers in Map using IMap.AddLayers method for auto arrangement of point layers above line layers above polygon layers:

IMap pMap;
            EnumExt test = new EnumExt();
            pMap = m_hookHelper.ActiveView.FocusMap;
            IWorkspaceFactory pWrkFac = new FileGDBWorkspaceFactory();
            IWorkspace pWrk = pWrkFac.OpenFromFile(@"C:\Program Files (x86)\ArcGIS\DeveloperKit10.0\Samples\data\California\California.gdb",0);
            IFeatureLayer pLyr = new FeatureLayerClass();
            IEnumDataset pEnumDataset = pWrk.get_Datasets(esriDatasetType.esriDTFeatureClass);
            IDataset pDataset;
            IFeatureClass pFeatClass ;


            IEnumDatasetName pDatasetName;
            pDatasetName = pWrk.get_DatasetNames(esriDatasetType.esriDTFeatureClass);
            IName pName;
            while (pEnumDataset.Next() != null)
            {
                try
                {
                    pName = pDatasetName.Next() as IName;


                    pEnumLayer = pFac.CreateLayersFromName(pName);


                   pMap.AddLayers(pEnumLayer, true);
                }
                catch (Exception e)
                {

                    MessageBox.Show(e.Message);
                }
            }

            m_hookHelper.ActiveView.Refresh();

Re: How to add Layers using IEnumLayer for autoArrange

CharlieRichman — Fri, 21 Sep 2012 14:38:38 GMT

Fabulous -- but what's EnumExt()?

You don't seem to define m_hookHelper or pFac either.

I'd like to be able to start with a path to a layerfile and add the contents (which could include a group layer) via this mechanism...

Charlie Richman
District of Columbia Office of Planning

Re: How to add Layers using IEnumLayer for autoArrange

SumitSharma — Mon, 24 Sep 2012 17:48:39 GMT

Hello Charlie,

You don't require EnumExt as this was something I was doing for other test inside the code solution.

As this was an engine application therefore m_hookHelper is predefined inside the engine template. If you are creating ArcGIS Desktop application then you can use IMxDocument to get IActiveView.

Let me know if you require some more details!!

Sumit