I don't usually need to deal with geometries too often in ArcObjects, but this is giving me quite a hard time.I can get a IFeature object from my SDE. I can access the attributes fields just fine and pass them as needed. The problem is, when I try to access the IFeature.Shape property, I get the following error.Error HRESULT E_FAIL has been returned from a call to a COM component.
stacktraceat ESRI.ArcGIS.Geodatabase.IFeature.get_Shape()
This is a code snippet below.
Type sde_type = Type.GetTypeFromProgID("esriDataSourcesGDB.SdeWorkspaceFactory");
//IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)new SdeWorkspaceFactoryClass();
IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(sde_type);
IWorkspace workSpace = workspaceFactory.Open(propertySet, 0);
IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workSpace;
#endregion
IFeatureClass featureClass = featureWorkspace.OpenFeatureClass("sde.LA_Parcels");
// prepare the query filter
IQueryFilter qf = new QueryFilterClass();
qf.SubFields = "AIN";
qf.WhereClause = "AIN = '" + ain + "'";
IFeatureCursor fc = featureClass.Search(qf, true);
IFeature feat = fc.NextFeature();
string s_ain = "NOT FOUND";
if (feat != null)
{
int field = feat.Fields.FindField("AIN");
s_ain = feat.get_Value(field) as string;
// grab some more field data ...
IGeometry fgeom = null;
try
{
fgeom = feat.Shape; // error gets thrown here
}
catch (Exception e)
{
throw new Exception(String.Format("ParcelLocationData Geometry from Shape Error: {0}", e.Message), e);
}
}
I had read on a blog that it was good practice when creating ArcObjects objects on server to not use "new", but use Activator.CreateInstance, so I switched that up as it came up in my search on the COM error, but still nothing works.I can view this data in ArcMap just fine, it works on MapServices that we have.I have other C# dll's using ArcObjects running on this server just fine for sewer tracing, none of which actually access the IFeature.Shape property though.Is there a step I am missing to try and do this?My goal here is to use the IFeature.Shape as a basis for some spatial queries on other features.Something like thisIArea area = (IArea)fgeom;
spatialFilter.Geometry = area.Centroid
Thanks in advance, and I'm sorry if this is something simple I am missing.
