topic How to instantiate IWorkspace in ArcObjects SDK Questions

How to instantiate IWorkspace

StevenMumby — Mon, 18 Nov 2013 12:43:34 GMT

Hi guys

I'm writing an ArcMap class library. This will add a menu item to ArcMap. Once the menu option is clicked, I need to set my ArcMaps document into edit mode. I've found a sample piece of code to help me accomplish this, but need to pass in a reference to an object of type IWorkspace. This is being written with ArcObjects 9.3. I currently have access to instances of IApplication and IMaps in my solution. How can I accomplish this?

Tks

Re: How to instantiate IWorkspace

DuncanHornby — Sat, 11 Dec 2021 09:16:44 GMT

You can get a handle on the Workspace of a layer in the map document through IDataset. So something like:

Dim pDS as IDataset
pDS = pFeaturelayer
Dim pWS as IWorkspace
pWS = pDS.Workspace

Duncan

Re: How to instantiate IWorkspace

StevenMumby — Mon, 18 Nov 2013 16:26:24 GMT

Thanks Duncan. Sorry for additional question, but what is pFeatureLayer? I'm a web developer primarily and this is my first go at woring with arcGIS.

Re: How to instantiate IWorkspace

DuncanHornby — Mon, 18 Nov 2013 18:01:53 GMT

pFeatureLayer is the pointer to a layer. So you would get a handle on a layer in a map through IMap.Layer. This returns a ILayer pointer. You would typically cast that into an IFeatureLayer which gives you access to many other properties such as the FeatureClass.

Duncan

Re: How to instantiate IWorkspace

StevenMumby — Tue, 19 Nov 2013 13:18:45 GMT

Ah, it was the casting that was throwing me off. This seems to work:

            // set the map into edit mode//
            IMap mMap = mMaps.get_Item(0);
            ILayer mLayer = mMap.get_Layer(0);
            IFeatureLayer mFeatureLater = (IFeatureLayer)mLayer;
            IDataset mDataSet = mFeatureLater.FeatureClass.FeatureDataset;
            IWorkspace mWorkSpace = mDataSet.Workspace;
            startEditing(mWorkSpace);

Tks for the help, Duncan. Much appreciated.