skyline开发——读取Shapefile要素属性

double len;
                IFeatures66 features = featureLayer.FeatureGroups.Polyline.GetCurrentFeatures();
                foreach (IFeature66 feature in features)
                {
                    len = 0;
                    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, 3));
                                break;
                            }
                        }
                    }
                }