1.系统族的创建

系统族的创建方法放在各自的类下或者Document下面。

比如墙的创建：
Wall.Create Method (Document, IList(Curve), ElementId, ElementId, Boolean)
public static Wall Create(
    Document document,
    IList<Curve> profile,
    ElementId wallTypeId,
    ElementId levelId,
    bool structural
)

测试代码：
public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Document doc = uidoc.Document;

            XYZ point1 = uidoc.Selection.PickPoint(ObjectSnapTypes.None,"请选择墙的起始点");
            XYZ point2 = uidoc.Selection.PickPoint(ObjectSnapTypes.None,"请选择墙的终点");

            Line li = Line.CreateBound(point1, point2);

            ElementId id = new ElementId(355);

            using (Transaction trans = new Transaction(doc, "创建墙"))
            {
                trans.Start();
                Wall.Create(doc, li,id, false);
                trans.Commit();
            }

            return Result.Succeeded;

        }

测试结果

2.可载入族的创建

可载入族的创建都在Document.NewFamilyInstance ，其实包含若干重载。
另外NewFamilyInstances2是批量创建。

创建柱子：
 public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Document doc = uidoc.Document;

            XYZ point = uidoc.Selection.PickPoint(ObjectSnapTypes.None, "柱子的位置");


            ElementId levelId = new ElementId(355);
            Level lev = doc.GetElement(levelId) as Level;

            ElementId columSymbol = new ElementId(263331);
            FamilySymbol fs = doc.GetElement(columSymbol) as FamilySymbol;

            using (Transaction trans = new Transaction(doc, "创建柱子"))
            {
                trans.Start();
                doc.Create.NewFamilyInstance(point, fs, lev, StructuralType.NonStructural);
                trans.Commit();
            }

            return Result.Succeeded;

        } 

测试结果

3.删除

删除操作都是一样的。

        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Document doc = uidoc.Document;

            Reference refer = uidoc.Selection.PickObject(ObjectType.Element);
            Element ele = doc.GetElement(refer);

            using (Transaction trans = new Transaction(doc, "删除墙"))
            {
                trans.Start();
                doc.Delete(ele.Id);
                trans.Commit();
            }
      
            return Result.Succeeded;
        }