How to add subelements to selection?

[YarUnderoaker]

Hi.

It is possible to add subelements of structural connection to ActiveUIDocument.Selection ?

Subelements does not have ElementId so it can not be added as usual.

[Anonymous]

Absolutely!!

UIDocument pUIDoc = this.ActiveUIDocument;
var lSelectedIds = pUIDoc.Selection.GetElementIds().ToList();
List<ElementId> lSubIds = new List<ElementId>();

foreach (var pId in lSelectedIds)
{
	Element pElt = pUIDoc.Document.GetElement(pId);
	if (pElt is FamilyInstance)
	{
		FamilyInstance pFamInst = pElt as FamilyInstance;
		if (pFamInst != null)
			lSubIds.AddRange(pFamInst.GetSubComponentIds());
	}
}

lSelectedIds.AddRange(lSubIds);

Hope that helps.  Let me know if you have any questions about any of that!!

Don't forget to mark your answers...  It helps the next individual find theirs faster!!

Cheers, 

Geoff Overfield

Senior Software Engineer

FabPro, LLC

[YarUnderoaker]

No, it is subcomponents. But there is new entity - subelements. They has no ElementId, but can be selected in Revit by pushing Tab on it master. 

There is deadlock situation. Structural connection's subelement can be selected nor via schedule neither API.

If user want to write value to some parameters it must manually click one by one each subelement in model.

[YarUnderoaker]

I still searching solution 😓.

[jeremytammik]

If it can be selected by tabbing, it can presumably be represented by a stable reference.

There have been several discussions in the past here and by The Building Coder concerning stable references and their use in dimensioning and other areas:

• Reference Stable Representation Magic Voodoo -- http://thebuildingcoder.typepad.com/blog/2016/04/stable-reference-string-magic-voodoo.html
• Voodoo Magic Retrieves Global Instance Edges -- http://thebuildingcoder.typepad.com/blog/2016/08/voodoo-magic-retrieves-global-instance-edges.html
• Hatch Line Dimensioning Voodoo -- http://thebuildingcoder.typepad.com/blog/2017/06/hatch-line-dimensioning-voodoo.html
• Reference Intersector and Deleting Reference Planes -- http://thebuildingcoder.typepad.com/blog/2018/09/reference-intersector-and-deleting-reference-planes...
• New RevitLookup Snoops Edges, Faces and Links -- https://thebuildingcoder.typepad.com/blog/2019/01/new-revitlookup-snoops-edge-face-link.html
• Stable Reference Relationships -- https://thebuildingcoder.typepad.com/blog/2019/02/stable-reference-relationships.html

I don't know off-hand whether they might also enable selection as well...

Search this forum for 'stable reference' and see whether you strike lucky.