topic Re: How to highlight elements when selecting them in Revit API Forum

How to highlight elements when selecting them

desdinova — Wed, 22 Jul 2015 16:21:25 GMT

List<ElementId> elemIdList = new List<ElementId>();
            try
            {
              
                while (true)
                {
                    elemIdList.Add((uidoc.Selection.PickObject(ObjectType.Element, "Pick a room").ElementId));
                    uidoc.Selection.SetElementIds(elemIdList);
                    uidoc.RefreshActiveView();
                   
                }
                
            }
            catch { }

hi friends

i want to highlight elements when i am selecting them like ctrl and pick objects

How can i do that in while loop in api?

Thanks in advance.....

Re: How to highlight elements when selecting them

Aaron.Lu — Mon, 27 Jul 2015 02:29:47 GMT

Dear, what about shi:

    try
    {
        while (true)
        {
            elemIdList.Add((uidoc.Selection.PickObject(ObjectType.Element, "Pick a room").ElementId));
        }
    }
    catch 
    {
        uidoc.Selection.SetElementIds(elemIdList);
        uidoc.RefreshActiveView();
    }

Re: How to highlight elements when selecting them

desdinova — Mon, 27 Jul 2015 07:37:20 GMT

Thank you Aaron.Lu
It doesn't work for me.

Re: How to highlight elements when selecting them

Aaron.Lu — Mon, 27 Jul 2015 09:01:24 GMT

What is your revit version.
it works for me on Revit 2015.

Re: How to highlight elements when selecting them

desdinova — Mon, 27 Jul 2015 09:29:54 GMT

I use Revit 2015

Re: How to highlight elements when selecting them

Aaron.Lu — Tue, 28 Jul 2015 02:20:35 GMT

Not sure what is the problem...

Attachment is video to demo how it works,

Full code I'm using:

    [TransactionAttribute(TransactionMode.Manual)]
    public class Pickwhile : IExternalCommand
    {
        public Document doc;
        public Autodesk.Revit.ApplicationServices.Application RevitApp;
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            RevitApp = commandData.Application.Application;
            var uidoc = commandData.Application.ActiveUIDocument;
            if (uidoc == null)
            {
                message = "Please open a document";
                return Result.Failed;
            }

            doc = commandData.Application.ActiveUIDocument.Document;
            List<ElementId> elemIdList = new List<ElementId>();
            try
            {
                while (true)
                {
                    elemIdList.Add((uidoc.Selection.PickObject(ObjectType.Element, "Pick a room").ElementId));
                }
            }
            catch
            {
                uidoc.Selection.SetElementIds(elemIdList);
                uidoc.RefreshActiveView();

                var td = new TaskDialog("Info");
                td.MainInstruction = commandData.Application.ActiveUIDocument.Selection.GetElementIds().Aggregate("", (ss, el) => ss + "," + el).TrimStart(',');
                td.TitleAutoPrefix = false;
                td.Show();
            }

            return Result.Succeeded;
        }
    }

Re: How to highlight elements when selecting them

desdinova — Tue, 28 Jul 2015 09:04:32 GMT

Hi and thank you again...

I want to make selection like this..

Please see attachment.

Regards...

Re: How to highlight elements when selecting them

Aaron.Lu — Wed, 29 Jul 2015 06:03:56 GMT

I think my demo code could do what you want.
if not, would you let me know what is the problem? e.g. errors or behaviors you not expected.

and another choice is to use PickObjects() method. Did you try that?

Re: How to highlight elements when selecting them

desdinova — Wed, 29 Jul 2015 10:27:44 GMT

Thank you again
PickObjects() method does what i want...