how to gets relation of element with its tag or its label?

[prasannamurumkar]

I have doors.

I have door tags

want to verify the whether  particular tags present on that  particular door?

[jeremytammik]

Did you RTFM?

https://apidocs.co/apps/revit/2019/759306d1-5168-ef9a-91e4-494c7eff0b5d.htm

TaggedLocalElementId looks like it will do the job.

Cheers,

Jeremy

[jeremytammik]

Also, you already asked this same question and received the same answer before:

https://forums.autodesk.com/t5/revit-api-forum/i-want-to-check-whether-tag-is-present-on-door-by-api...

[prasannamurumkar]

At that time i thought that answer is correct but actually answer is wrong.

He answered as tag contains same element  id as that of tag.

but tags are different Id than the element ID

also he  given tags we get like this

var doorTagsIds = new HashSet<ElementId>(collector.OfClass(typeof(IndependentTag)).OfCategory(BuiltInCategory.OST_DoorTags).OfType<IndependentTag>().Select(x => x.GetTaggedLocalElement()?.Id).Where(x => x != null));

 by this not able to collect door tag it just collects id s of door only.

[jeremytammik]

It collects all independent tags AND the element ids of the doors that they tag.

[TWhitehead_HED]

Hi All,

Given the above property is no longer valid in the current API, what is an updated solution? 

[jeremy_tammik]

I would assume that this can easily be discovered by snooping the element and its tag and their properties using RevitLookup and other Revit BIM database exploration tools. Have you taken a look at that?

[jrostar]

You could also assume that people come to public forums asking for help after they have already spent time trying to discover the answer themselves and are hoping that knowledgeable people from the community would be willing to help.

[jeremy_tammik]

Yes, indeed! Sometimes I do, and sometimes they have, and sometimes they have not. It takes all sorts...

[TWhitehead_HED]

There's a saying about assuming... I'll leave it up to you to find on the internet.  

For others scraping through these posts looking for a modicum of actual help, here's how I ended up solving it with help from @Mohamed_Arshad (who actually provided some guidance). 

using (Transaction trans = new Transaction(doc, "Tag Parent Doors"))
            {
                trans.Start();

                foreach (FamilyInstance door in doors)
                {
                    if (new FilteredElementCollector(doc, currentView.Id)
                         .OfCategory(BuiltInCategory.OST_DoorTags)
                         .OfClass(typeof(IndependentTag))
                         .Cast<IndependentTag>()
                         .SelectMany(x => x.GetTaggedLocalElementIds())
                         .Where(x => x == door.Id).Any())
                    {
                        skipCount++;
                        continue;
                    }
                }
            }

[DanielKP2Z9V]

If anyone lands here looking for a reference how to switch selection between tags and their hosts I have commands to SelectAssociatedTags and SelectElementsHostedBySelectedTags 

[DanielKP2Z9V]

correction, this doesn't seem to work however on rooms and areas - if anyone figured out how to associate room/area tags to their hosts that would be very helpful

[jeremy_tammik]

Many thanks to Tom, Mohamed and Daniel for digging in and helping with this!

I shared their answers on the blog:

• https://thebuildingcoder.typepad.com/blog/2025/01/access-to-uiapplication-tags-and-llm-api-support.h...