topic Re: Add FeatureReader to acSelection in AutoCAD Map 3D Developer Forum

Add FeatureReader to acSelection

Anonymous — Wed, 12 Oct 2011 20:49:18 GMT

Hi there,

I'm trying to add all fdo layer features to MgSelectionBase so I can turn on/off map layer features depending on the selection query.

here is what I have:

AcMapLayer maplayer = AcMapFeatureEntityService.GetLayer(objId); //objId is from prompt selection

MgFeatureQueryOptions queryOpts = new MgFeatureQueryOptions(); 
queryOpts.SetFilter("PRIMARYINDEX > 0"); //select everything on the layer

MgResourceIdentifier fsId = new MgResourceIdentifier(maplayer.GetFeatureSourceId());
MgFeatureService fs = AcMapServiceFactory.GetService(MgServiceType.FeatureService) as MgFeatureService; 

MgFeatureReader featureReader = fs.SelectFeatures(fsId, maplayer.FeatureClassName, queryOpts);

AcMapSelection selBaseAll = new AcMapSelection(AcMapMap.GetCurrentMap());

//populate selection with all features
selBaseAll.AddFeatures(maplayer, featureReader, 0);

//hide all features
maplayer.SetFeatureVisibility(selBaseAll, false);
.
.
//turn on features that is passed as parameter to fn.

This works if the layer source is SDF file, but if the layer source is sql spatial, i get an error "An exceotion occured in FDO component. Property "GwsId" not defined for class "Classname"". this is on line: selBase.AddFeatures(..);

That field "GwsId" doesn't exists in database, if you open it in sql studio.. what am I doing wrong?

Thank you,

-dm

Re: Add FeatureReader to acSelection

Daniel.Du — Wed, 23 Nov 2011 07:58:22 GMT

When Map 3D connects to FDO data stores like Oracle/Sql Server and add layers to map, it will cache the data and use "GwsId" as identity key. Following code snippet works fine for Sql Server Spatial data store :

[CommandMethod("SetVisible")]

public void SetVisible()

{

SetFeatureVisibility(true);

}

[CommandMethod("setInvisible")]

public void SetInvisible()

{

SetFeatureVisibility(false);

}

public void SetFeatureVisibility( bool visible )

{

AcMapMap map = AcMapMap.GetCurrentMap();

MgLayerCollection layers = map.GetLayers();

MgLayerBase layer = layers.GetItem("FeatureClass1");

AcMapLayer mapLayer = layer as AcMapLayer;

MgFeatureQueryOptions opts = new MgFeatureQueryOptions();

opts.SetFilter("ID > 0");

MgResourceIdentifier featureId = new MgResourceIdentifier(mapLayer.GetFeatureSourceId());

MgFeatureReader reader = mapLayer.SelectFeatures(opts);

AcMapSelection selection = new AcMapSelection(map);

selection.AddFeatures(mapLayer, reader, 0);

reader.Close();

mapLayer.SetFeatureVisibility(selection, visible);

}

Re: Add FeatureReader to acSelection

Anonymous — Wed, 07 Nov 2012 08:39:16 GMT

I have a question.

i would like to turn OFF/ON some set of FDO layers(Enterprises(Topobase Layers)).

The code is not working for me. Please help me

AcMapMap acMap = AcMapMap.GetCurrentMap();

MgLayerCollectionlayers = acMap.GetLayers();

if (layers != null&& layers.Count > 0)

{

foreach (MgLayerBase layer inlayers)

{

if(layer.GetVisible())

{

layer.SetVisible(

false);

//layer.Visible = false;//layer.ForceRefresh();

}

//if (layer.GetDisplayInLegend())//{// layer.DisplayInLegend = false;// layer.SetDisplayInLegend(false);// layer.ForceRefresh();//}

}

//AcMapMap.ForceScreenRefresh();