我正在使用 FilteredElementCollector 来检索族实例:
var collector = new FilteredElementCollector(doc, doc.ActiveView.Id);
var familyInstances = collector.OfClass(typeof(FamilyInstance));
这对于没有嵌套族实例的族来说效果很好。但是如果我的项目中有A族的实例,并且A族本身包含B族的实例,那么这段代码不会获取B族的实例。我如何获取B族的实例?
我是 Revit API 的新手,似乎必须有一个简单的解决方案,但我在网上找不到。我正在使用 Revit 2015,如果这有影响的话。
familyInstances 将包含活动视图中所有族的列表(包括嵌套和非嵌套族)。
您需要做的是迭代每个 FamilyInstance 并查看它是否已经是根族(即包含嵌套族)或嵌套族或没有。像这样的东西:
var collector = new FilteredElementCollector(doc, doc.ActiveView.Id);
var familyInstances = collector.OfClass(typeof(FamilyInstance));
foreach (var anElem in familyInstances)
{
if (anElem is FamilyInstance)
{
FamilyInstance aFamilyInst = anElem as FamilyInstance;
// we need to skip nested family instances
// since we already get them as per below
if (aFamilyInst.SuperComponent == null)
{
// this is a family that is a root family
// ie might have nested families
// but is not a nested one
var subElements = aFamilyInst.GetSubComponentIds();
if (subElements.Count == 0)
{
// no nested families
System.Diagnostics.Debug.WriteLine(aFamilyInst.Name + " has no nested families");
}
else
{
// has nested families
foreach (var aSubElemId in subElements)
{
var aSubElem = doc.GetElement(aSubElemId);
if (aSubElem is FamilyInstance)
{
System.Diagnostics.Debug.WriteLine(aSubElem.Name + " is a nested family of " + aFamilyInst.Name);
}
}
}
}
}
}
我通常会大量使用 Linq,以留下更简洁的代码。看这个例子:
List<Element> listFamilyInstances = new FilteredElementCollector(doc, doc.ActiveView.Id)
.OfClass(typeof(FamilyInstance))
.Cast<FamilyInstance>()
.Where(a => a.SuperComponent == null)
.SelectMany(a => a.GetSubComponentIds())
.Select(a => doc.GetElement(a))
.ToList();
我有一个包含嵌套家庭的家庭实例。但是,当我调用方法 a.GetSubComponentIds() 时,它返回 null。你知道为什么会这样吗?