Dictionary<string, BoundingBoxUV> buildingBbox = Utils.
    GetBuildingBoundingBoxUV(
    doc, 
    uiDoc, 
    expand: 1.2, 
    matchAll: false);

Dictionary<string, List<Level>> buildingLev = Utils.
    GetBuildingLevels(
    buildingBbox.Keys.ToList(), 
    doc);

Dictionary<string, <ElementId, List<Room>>> GetRoomDict(
    List<Room> targetRooms,
    Dictionary<string, BoundingBoxUV> buildingBbox,
    Dictionary<string, List<Level>> buildingLev)
{
	// roomDict通过楼号<string>和楼层ID<ElementId>检索指定位置的房间
	var roomDict = new Dictionary<string, Dictionary<ElementId, List<Room>>>();
    
    /* 
     * 根据buildingBbox中的楼栋范围，和buildingLev中的楼层信息，
     * 将房间按照楼号和楼层进行分组。
     * ......
     * 最后得到完整的roomDict。
     */
    
    return roomDict;
}

Dictionary<string, <ElementId, List<ElementId>>> GetElemIdDict(
    List<ElementId> targetElemIds,
    Dictionary<string, BoundingBoxUV> buildingBbox,
    Dictionary<string, List<Level>> buildingLev)
{
	// elemIdDict通过楼号<string>和楼层ID<ElementId>检索指定位置的元素ID
	var elemIdDict 
        = new Dictionary<string, Dictionary<ElementId, List<ElementId>>>();
    
    /* 
     * 同上，
     * ......
     * 最后得到完整的elemIdDict。
     */
    
    return elemIdDict;
}

var roomDict = GetRoomDict(...);
var elemIdDict = GetElemIdDict(...);

// 按照楼号-楼层的结构进行遍历
foreach(var num in roomDict.Keys)
{
    foreach(var levId in roomDict[num].Keys)
    {
        List<ElementId> searchRange = elemIdDict[num][levId];
        foreach(var room in roomDcit[num][levId])
        {
            // 通过缩小搜索范围来提高获取的效率
            FilteredElementCollector interElems = 
                GetRoomIntersectElement(
                room, 
                doc, 
                scaleFactor:1,
                useBoundingBox:false,
                searchRange:searchRange);           
            /* 
             * 其他处理
             * ......
             */            
        }
    }
}

View preView = null;
bool switched = false;
Utils.SwitchTo2D(doc, uiDoc, ref preView, ref switched, viewName:"1F");

/* 
 * Write your code here. 
 * ......
 */

// 关闭当前视图，即切换回原视图
Utils.CloseCurrentView(uiDoc);

// 由Element获取对应2D视图，若无法获取，则workview为doc.ActiveView
workview = Utils.Get2DWorkView(elem, doc);
// Use workview. For example:
BoundingBoxXYZ box = elem.get_BoundingBox(workview);
/* 
 * 如何替换原视图转换方法：
 * 1. 删除SwitchTo2D和CloseCurrentView的调用，或其他涉及改变doc.ActiveView值的操作；
 * 2. 将代码中的doc.ActiveView替换为上述方法获得的workview。
 * 例如：
 * elem.get_BoundingBox(doc.ActiveView)替换为elem.get_BoundingBox(workview)
 */

string log = "";

/* 
 * Write the information that needs to be presented to the "log".
 * ......
 */

Utils.PrintLog(log, "H00xxx", doc);