Setting the default ID of a system text using API

[Anonymous]

Hi all,

I am a newbie in Revit API.

I am just wondering how to set the default ID for a system text families. I used the link below for the similar scenario but this can only access loadable families:

https://forums.autodesk.com/t5/revit-api-forum/set-default-family-type-id-for-my-room-tag/m-p/555547...

Here's the updated code that supposed to set the system text ID.

FilteredElementCollector collector = new FilteredElementCollector(doc);

collector = collector.OfClass(typeof(TextNote));

var query = from element in collector where element.Name == "Text-3.0mm-Dot-O" select element;

List<Element> famSyms = query.ToList<Element>();

ElementId symbolId = famSyms[0].Id;

FamilyInstanceFilter filter = new FamilyInstanceFilter(doc, symbolId);

collector = new FilteredElementCollector(doc);

ICollection<Element> familyInstances = collector.WherePasses(filter).ToElements();

ElementId txId = new ElementId(BuiltInCategory.OST_TextNotes);

doc.SetDefaultFamilyTypeId(txId, symbolId);

Any thoughts please.

Much appreciated,

Wil

[JimJia · Accepted solution]

Dear Wilfredo Mayo,

Yes, the Document.SetDefaultFamilyTypeId(...) requires one family type for second method parameter.

Note that your code below has some problem on family type retrieval:

FilteredElementCollector collector = new FilteredElementCollector(doc);
collector = collector.OfClass(typeof(TextNote)); // This is instance, it's incorrect

The correct code should be:

FilteredElementCollector collector = new FilteredElementCollector(doc);
collector = collector.OfClass(typeof(TextNoteType)); // family type is correct

[Anonymous]

Many thanks Jim! Will try to amend the codes then see how it goes.

Much appreciated,

Wil

[Anonymous]

Apologies for not coming back soon. This works a fortune! Thanks a lot Jim for your valuable time to help newbies like me...