Revit二次开发实战04（元素搜集过滤器FilteredElementCollector）

Revit二次开发实战

FilteredElementCollector元素搜集过滤器

源码

using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Architecture;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RevitHello
{
    [Transaction(TransactionMode.Manual)]
    class CElement : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            //获取当前UI文档
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            //获取当前文档
            Document doc = uidoc.Document;


            //创建搜集过滤器
            //■构造函数1，搜集文档中所有元素
            FilteredElementCollector collector1 = new FilteredElementCollector(doc);
            //按照类别进行过滤
            FilteredElementCollector filtered1 = collector1.OfCategory(BuiltInCategory.OST_Doors);
            ShowElements(filtered1, uidoc, "filtered1");

            //选择多个对象，并获取其id集合
            var refs = uidoc.Selection.PickObjects(ObjectType.Element);
            List<ElementId> ids = new List<ElementId>();
            refs.ToList().ForEach(r => ids.Add(r.ElementId));
            //■构造函数2，搜集集合中的元素
            FilteredElementCollector collector2 = new FilteredElementCollector(doc, ids);
            //按照类别Id进行过滤 所有的门
            FilteredElementCollector filtered2 = collector2.OfCategoryId(new ElementId(BuiltInCategory.OST_Doors));
            ShowElements(filtered2, uidoc, "filtered2");

            //获取当前文档的当前视图
            View view = uidoc.ActiveView;
            //■构造函数3，搜集视图中的元素
            FilteredElementCollector collector3 = new FilteredElementCollector(doc, view.Id);
            //按照class的Type类型进行过滤
            FilteredElementCollector filtered3 = collector3.OfClass(typeof(Wall));
            ShowElements(filtered3, uidoc, "filtered3");

            FilteredElementCollector collector4 = new FilteredElementCollector(doc);
            List<Room> filtered4 = collector4.WherePasses(new RoomFilter()).Cast<Room>().ToList();
            ShowElements(filtered4, uidoc, "filtered4");

            //获取一个包围盒，并过滤出与该包围盒相交的元素
            var refe = uidoc.Selection.PickObject(ObjectType.Element, new DoorSelectionFilter());
            var ele = doc.GetElement(refe);
            var box = ele.get_BoundingBox(view);
            BoundingBoxIntersectsFilter intersectsFilter = new BoundingBoxIntersectsFilter(new Outline(box.Min, box.Max));
            FilteredElementCollector collector5 = new FilteredElementCollector(doc);
            var filtered5 = collector5.WherePasses(intersectsFilter).ToElements();
            ShowElements(filtered5, uidoc, "filtered5");

            return Result.Succeeded;
        }

        //把输出元素集合信息封装成一个函数
        void ShowElements(IEnumerable<Element> elements, UIDocument uidoc, string title)
        {
          
            StringBuilder sb = new StringBuilder();
            sb.AppendLine($"Count={elements.Count()}");
            List<ElementId> ids = new List<ElementId>();
            elements.ToList().ForEach((e) =>
            {
                sb.AppendLine($"Id={e.Id},Name={e.Name},Category={e.Category.Name}");
                ids.Add(e.Id);
            });
            //高亮显示所有过滤的对象
            uidoc.Selection.SetElementIds(ids);
            //对话框显示所有过滤对象的信息
            TaskDialog.Show(title, sb.ToString());
        }
    }
    class DoorSelectionFilter : ISelectionFilter
    {
        public bool AllowElement(Element elem)
        {
            if (elem.Category.Id.IntegerValue==(int)BuiltInCategory.OST_Doors) return true;
            return false;
        }

        public bool AllowReference(Reference reference, XYZ position)
        {
            return true;
        }
    }
}