[mapguide-users] Trying to add another class definition to a SDF

[Jamo]

I've been trying this code to add another class definition to a SDF, it only
adds a new classDefinition when the users SDF already exists.... is this
possible, everything seems to run through fine .... but no new class..

      if (ResourceService.ResourceExists(dataSourceId) == false)
      {

        //create Feature Source
        MgClassDefinition myClassDef = new MgClassDefinition();
        myClassDef.SetName(layerName);
        myClassDef.SetDescription(layerDesc);

        //TODO : make SHPGEOM a Variable...
        myClassDef.SetDefaultGeometryPropertyName("GEOM");

        //Set KEY Property
        MgDataPropertyDefinition prop = new
MgDataPropertyDefinition("FeatId");
        prop.SetDataType(MgPropertyType.Int32);
        prop.SetAutoGeneration(true);
        prop.SetReadOnly(true);
        myClassDef.GetIdentityProperties().Add(prop);
        myClassDef.GetProperties().Add(prop);

        //Set geometry property
        MgGeometricPropertyDefinition geomProp = new
MgGeometricPropertyDefinition("GEOM");
        geomProp.SetGeometryTypes(MgFeatureGeometricType.Curve);
        myClassDef.GetProperties().Add(geomProp);

        //Create the schema
        MgFeatureSchema schema = new MgFeatureSchema("Default", "Default
Feature Schema");
        schema.GetClasses().Add(myClassDef);

        MgCreateSdfParams sdfParams = new MgCreateSdfParams("MGA-56 (GDA94 /
MGA zone 56)", map.GetMapSRS(), schema);
        FeatureService.CreateFeatureSource(dataSourceId, sdfParams);

      }
      else
      {
        //create Feature Source
        MgClassDefinition myClassDef = new MgClassDefinition();
        myClassDef.SetName(layerName);
        myClassDef.SetDescription(layerDesc);

        //TODO : make SHPGEOM a Variable...
        myClassDef.SetDefaultGeometryPropertyName("GEOM");

        //Set KEY Property
        MgDataPropertyDefinition prop = new
MgDataPropertyDefinition("FeatId");
        prop.SetDataType(MgPropertyType.Int32);
        prop.SetAutoGeneration(true);
        prop.SetReadOnly(true);
        myClassDef.GetIdentityProperties().Add(prop);
        myClassDef.GetProperties().Add(prop);

        //Set geometry property
        MgGeometricPropertyDefinition geomProp = new
MgGeometricPropertyDefinition("GEOM");
        geomProp.SetGeometryTypes(MgFeatureGeometricType.Curve);
        myClassDef.GetProperties().Add(geomProp);

        FeatureService.DescribeSchema(dataSourceId,
"Default")[0].GetClasses().Add(myClassDef);
      }

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