# 内置类别
Introduction
扩展库支持引用所有 Revit
中的内置类别的ElementId
# 内置类别ElementId
通过类 BuiltInCategories
我们可以直接访问内置类别的ElementId
,如下:
//无效类:返回BuiltInCategory枚举类下的INVALID的Id
BuiltInCategories.Invaild
//门类:OST_Doors
BuiltInCategories.Door
//电缆桥架类:OST_CableTray
BuiltInCategories.CableTray
//电缆桥架配件:OST_CableTrayFitting
BuiltInCategories.CableTrayFitting
....
# 按视图规程获取
扩展包支持按视图规程ViewDiscipline
获取内置类别
//传入视图规程
List<ElementId> elementIds = BuiltInCategories.GetCategoryIdsByViewDiscipline(ViewDiscipline viewDiscipline);