Revit常用的元素过滤方法

过滤器过滤元素：

• 创建过滤收集器

Document document = revit.Application.ActiveUIDocument.Document;
FilteredElementCollector collector = new FilteredElementCollector(document);　　

• 过滤元素

1. 快速过滤

   collector.OfCategory(BuiltInCategory.OST_Walls).ofClass(typeof(FamilyInstance))

   OfCategory过滤类别，包括FamilySymbol及FamilyInstance,先通过OfCategory进行过滤可以提高效率，通过OfClass可以获取实例或者类型。

2. 通用过滤

   LogicalAndFilter doorInstancesFilter =new LogicalAndFilter(familyInstanceFilter, doorsCategoryfilter);
   
   FilteredElementCollector collector = new FilteredElementCollector(document);
   
   ICollection<ElementId> doors = collector.WherePasses(doorInstancesFilter).ToElementIds();

框选构件并筛选构件

public class WallFilter : ISelectionFilter
{
   public bool AllowElement(Element element)
   {
      if (element is Wall)
      {
         return true;
      }
      return false;
   }
   public bool AllowReference(Reference refer, XYZ point)
   {
      return false;
   }
}
// code in command
IList<Element> elements = uiDoc.Selection.PickElementsByRectangle(new WallFilter(), "请选择墙");
foreach (Element element in elements)
{
   // do something
}