skyline开发——读取Shapefile要素属性

 double len;
                 IFeatures66 features = featureLayer.FeatureGroups.Polyline.GetCurrentFeatures();
                 foreach (IFeature66 feature in features)
                 {
                     len = ;
                     if (feature.ObjectType == ObjectTypeCode.OT_FEATURE)
                     {
                         TerraExplorerX.IGeometry geometry = feature.Geometry;
                         if (geometry.GeometryType == SGGeometryTypeId.SG_MULTILINESTRING)
                         {
                             IMultiLineString line = (IMultiLineString)geometry;
                             len = line.Length;
                         }
                         else if (geometry.GeometryType == SGGeometryTypeId.SG_LINESTRING)
                         {
                             ILineString linestr = (ILineString)geometry;
                             len = linestr.Length;
                         }
                         foreach (IFeatureAttribute66 attr in feature.FeatureAttributes)
                         {
                             if (attr.Name == "Id")
                             {
                                 SetDataTableValue(dt, attr.Value, Math.Round(len, ));
                                 break;
                             }
                         }
                     }
                 }