#RTCNA wish 7 granted! Isolated 3d view for each workset

Create a 3d view for each workset, and in that view isolate the display of the elements in that workset.

Note that to find worksets we use a FilteredWorksetCollector (not a FilteredElementCollector) and a WorksetKindFilter to get only the user worksets (don’t want view, family, project standard worksets).

public void ViewWorksetIso()
{
    Document doc = this.ActiveUIDocument.Document;
    if (!doc.IsWorkshared)
        return;
    
    // get the 3d view type which is needed when creating 3d views
    ViewFamilyType vft = new FilteredElementCollector(doc)
        .OfClass(typeof(ViewFamilyType))
        .Cast<ViewFamilyType>()
        .FirstOrDefault(q => q.ViewFamily == ViewFamily.ThreeDimensional);
    
    using (Transaction t = new Transaction(doc, "workset view isolation"))
    {
        t.Start();
        
        // loop through all worksets (but only User worksets)
        foreach (Workset wset in new FilteredWorksetCollector(doc).WherePasses(new WorksetKindFilter(WorksetKind.UserWorkset)))
        {
            // create a 3d view
            View3D view = View3D.CreateIsometric(doc, vft.Id);
            
            // set the name of the view to match the name of the workset
            view.Name = "WORKSET - " + wset.Name;
            
            // isolate elements in the view, using a filter to find elements only in this workset
            view.IsolateElementsTemporary(new FilteredElementCollector(doc).WherePasses(new ElementWorksetFilter(wset.Id)).Select(q => q.Id).ToList());
        }
        t.Commit();
    }
}

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