How to ungroup all group elements in a project

[Anonymous]

Is anybody know how to ungroup all group elements and delete all groups?

[ToanDN]

Right click on each Group on the Browser, select all instances in project, ungroup, and repeat.

Or, open a 3D view, unhide everything, select all and filter to keep only the Groups highlighted, ungroup.

When done, Purge All and check the Groups you want to Purge, or simply delete them from the Browser.

[Anonymous]

I am talking about Revit Api. 

[ToanDN]

Had no idea.  Why didn't you post on API forum instead?

[Troy_Gates · Accepted solution]

Here is a quick macro that will ungroup all placed group instances in the model

public void UnGroupAll()
{
	Document doc = this.ActiveUIDocument.Document;
	
	using (Transaction t = new Transaction(doc, "Ungroup All Groups"))
	{
		t.Start();
		
		foreach (GroupType groupType in new FilteredElementCollector(doc).OfClass(typeof(GroupType))
	         .Cast<GroupType>()
	         .Where(gt => gt.Category.Name == "Model Groups" && gt.Groups.Size > 0))
		{
			foreach (Group group in groupType.Groups)
			{
				group.UngroupMembers();
			}
		}
		
		t.Commit();
	}			
}

[Anonymous]

Can it be applied to a family instead of a project? Even be embedded in Dynamo?

[Anonymous]

 Hi Troy,

Thats great!! What code language is this? Would like to try this out but need to set the code type in the macro dialogue box (revit2018)

Thanks in advance! 

P

[asantman7A9KD · Accepted solution]

So I come across the issue of groups in Revit models quite often - and I need them to go away for FM solutions as they serve no purpose other than clogging models. And typically production end-users do not use a solid naming or implementation when creating them - annoying to say the least. So I used a couple packages in Dynamo and created a small quick script you can run.  You could even add a node to delete them all after its run - I just select all groups in the browser list, right click and delete.

Script attached - Dynamo Version 2.02 - packages labeled within script

[jihwan.leeYV77N]

Watch it

[dc]

In Revit 2019, when I select all in project, I don't get further options.