How to select a single element in Revit? C#

[rita.aguiar]

I have tried with:

uidoc.Selection.SetElementIds(elementid);

SetElementIds requires an ICollector<ElementId> as argument and so I don't know how to only select a single element through its id, of type ElementId.

Any help would be appretiated.

[jeremytammik · Accepted solution]

Create a new, empty, list of element ids, i.e., an `IList<ElementId>`, add your one single element to that, and pass it in as an argument to SetElementIds.

[so-chong]

Hi,

Did you try to use the PickObject Method to select one object?

Something like this

ElementId elementid = null;

elementid = uidoc.Selection.PickObject(ObjectType.Element, "Select element or ESC to reset the view").ElementId;

[NinovSM]

Hello, do you know similar method for highligthing like SetElementIds but for subelements?

[jeremy_tammik]

Nope, sorry, I do not believe this exists.

You could submit a wish list item for this in the Revit Idea Station.

You could also try to highlight something using AVF or direct context 3D, cf.,

https://thebuildingcoder.typepad.com/blog/2020/10/onbox-directcontext-jig-and-no-cdn.html#3

[Walker.Jack]

Does the SetElements retrieve the elements from the database and highlight them in the UI or does it simply retrieve the elements from the database?

[jeremy_tammik]

It does not retrieve elements from the database.

It does select and highlight them in the UI.

For an example, please refer to the official Revit SDK and the SDK sample DirectionCalculation / FindSouthFacingWalls.