RevitAPI高效使用逻辑过滤器(ElementLogicalFilter)

Revit API有两种逻辑过滤器:LogicalOrFilter和LogicalAndFilter。

1) LogicalOrFilter
LogicalOrFilter是过滤器的逻辑或集合，可以查找匹配符合任意一个过滤器条件的元素。

例子1：构建:墙和标高的类别过滤器，然后将这两种过滤器通过逻辑“或”组合成一个逻辑或过滤器，最后将文档中符合墙和标高类别之一的所有元素査找出来。

    // 找到所有属于墙类别或者属于标高类别的元素 ElementCategoryFilter filterWall = new ElementCategoryFilter(BuiltInCategory.OST_Walls); ElementCategoryFilter filterLevel = new ElementCategoryFilter(BuiltInCategory.OST_Levels); LogicalOrFilter orFilter = new LogicalOrFilter(filterWall, filterLevel); FilteredElementCollector collector = new FilteredElementCollector(doc); ICollection founds = collector.WherePasses(orFilter).ToElements(); foreach(Element elem in founds) { Trace.WriteLine(String.Format("    Element  Id  {0},  type  {1}",  elem.Id.IntegerValue, 
elem.GetType())); } 

Type[]  elemTypes  =  {  typeof(Wall),  typeof(Level),  typeof(Floor),  typeof(Rebar), 
typeof(MEPSystem)}; List filterSet = new List(); foreach (Type elemType in elemTypes) { ElementClassFilter filter = new ElementClassFilter(elemType); filterSet.Add(filter); } orFilter = new LogicalOrFilter(filterSet); collector = new FilteredElementCollector(doc); founds = collector.WherePasses(orFilter).ToElements(); foreach (Element elem in founds) { Trace.WriteLine(String.Format("    Element  Id  {0},  type  {1}",  elem.Id.IntegerValue, 
elem.GetType().Name)); }

 ElementClassFilter wallFilter = new ElementClassFilter(typeof(Wall)); FilteredElementCollector collector = new FilteredElementCollector(doc); ICollection designOptIds = collector.OfClass(typeof(DesignOption)).ToElementIds(); foreach(ElementId curId in designOptIds) { ElementDesignOptionFilter designFilter = new ElementDesignOptionFilter(curId); LogicalAndFilter andFilter = new LogicalAndFilter(wallFilter, designFilter); collector = new FilteredElementCollector(doc); int wallCount = collector.WherePasses(andFilter).ToElementIds().Count; Trace.WriteLine(String.Format("    {0}  Walls  belong  to  DesignOption  {1}.",  wallCount, 
curId.IntegerValue)); } 

也可以使用快捷方法达到同样的功能，以下代码能极大减少代码的行数。

FilteredElementCollector collector = new FilteredElementCollector(document); // 找到所有符合某种特定设计选项的墙 optionICollection  walls  =       
collector.OfClass(typeof(Wall)).ContainedInDesignOption(myDesignOptionId).ToElementIds(); 

foreach (ElementId curId in designOptIds) { // 构造逻辑与过滤器 List filters = new List(); filters.Add(wallFilter); filters.Add(new ElementDesignOptionFilter(curId)); filters.Add(new StructuralWallUsageFilter(StructuralWallUsage.Bearing)); LogicalAndFilter andFilter = new LogicalAndFilter(filters); // 应用该过滤器并遍历获取到的元素 collector = new FilteredElementCollector(doc); int wallCount = collector.WherePasses(andFilter).ToElementIds().Count; Trace.WriteLine(String.Format("    {0} Bearing Walls belong to DesignOption {1}.", wallCount, 
curId.IntegerValue)); } 

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