topic Re: AcMapMap.GetLayers().Remove() fails in .NET Forum

AcMapMap.GetLayers().Remove() fails

Anonymous — Mon, 22 Aug 2011 21:55:29 GMT

I have a .NET plugin that loads an ArcSDE geodatabase layer programmatically using AcMapMap.LoadLayer(layerFilepath). I have been trying to programmatically remove the layer from the Task Pane using AcMapMap.GetLayers().Remove(layer), but this function is returning 'false' and is not removing the layer.

Does anybody know why this might not be working?

Thanks,

-andy

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Tue, 23 Aug 2011 08:42:58 GMT

Did you try to list layers in MgLayersCollection to see if the layer is there?

MgLayersCollection layers = AcMapMap.GetLayers();

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Tue, 23 Aug 2011 16:15:19 GMT

Yes, my code actually looks more like this:

MgLayerCollection layers = CurrentMap.GetLayers();

AcMapLayer layer = null;

foreach (MgLayerBase layerBase in layers)
{
     if (layerBase.LayerType == MgLayerType.Dynamic && layerBase.FeatureClassName.Contains("GEODATABASE_DBO:PARCELS") && layerBase is AcMapLayer)
     {
          layer = layerBase as AcMapLayer;
     }
}

if(layer != null)

{

bool result = CurrentMap.GetLayers().Remove(layer);

}

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Wed, 24 Aug 2011 15:09:22 GMT

Why do you convert MgLayerBase in AcMapLayer

Did you try with MgLayerBase?

I have similar code like this and it works fine

AcMapMap map = AcMapMap.GetCurrentMap();
                MgResourceService rs = AcMapServiceFactory.GetService(MgServiceType.ResourceService)
                    as MgResourceService;
                MgResourceIdentifier ri3 =
                    new MgResourceIdentifier("Library://Raster_1.FeatureSource");
                MgLayerCollection layers = map.GetLayers();
                foreach (MgLayerBase layer in layers)
                {
                    if (layer.Name.Contains("samobor"))
                    {
                        layers.Remove(layer);
                        break;
                    }
                }
                rs.DeleteResource(ri3);

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Wed, 24 Aug 2011 18:05:04 GMT

Thanks for your reply. I tried the code you posted and it is still failing to remove the layer. Can you think of any hooks I might have into the layer that need to be released? I'm already unsubscribing from document events (which I assume are unrelated anyways). The only other code that is executing with respect to the layer is GetCurrentMap().ImportLayer(layerFilePath); then layer.ForceRefresh().

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Wed, 24 Aug 2011 19:31:39 GMT

I've figured out the problem. The call to remove the layer failed when the function was called from a click event on a custom Palette I'd created. When I call the exact same function from the command line in AutoCAD, the removal works fine.

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Wed, 24 Aug 2011 20:29:32 GMT

Aaaaa, why didn't you say that earlier. If you are calling fuction for making changis in database or document from a pallet or a form, you have to lock the document first.

Something like this

using (DocumentLock docLock = doc.LockDocument())
{
// code goes here....
}

Re: AcMapMap.GetLayers().Remove() fails

Anonymous — Wed, 24 Aug 2011 21:41:24 GMT

Wow, it works perfectly now... thanks!

-andy