AddElevationCommand.cs

using System;
using System.Collections.Generic;
using System.Linq;

using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

using dosymep.Bim4Everyone;
using dosymep.Revit;

using RevitCopyViews.ViewModels;

namespace RevitCopyViews;

[Transaction(TransactionMode.Manual)]
public class AddElevationCommand : BasePluginCommand {
    public AddElevationCommand() {
        PluginName = "Добавить отметки этажа";
    }

    protected override void Execute(UIApplication uiApplication) {
        var uiDocument = uiApplication.ActiveUIDocument;
        var document = uiDocument.Document;

        string[] restrictedViewNames = new FilteredElementCollector(document)
            .OfClass(typeof(View))
            .Select(item => item.Name)
            .OrderBy(item => item)
            .Distinct()
            .ToArray();

        var errors = new List<View>();
        using(var transaction = document.StartTransaction("Добавление отметки этажа")) {
            var selectedViews = uiDocument.GetSelectedElements().OfType<View>();
            foreach(var view in selectedViews) {
                var splittedName = Delimiter.SplitViewName(
                    view.Name,
                    new SplitViewOptions {
                        ReplacePrefix = false,
                        ReplaceSuffix = false
                    });
                splittedName.Elevations = SplittedViewName.GetElevation(view);

                string viewName = Delimiter.CreateViewName(splittedName);
                if(view.Name.Equals(viewName)) {
                    continue;
                }

                if(restrictedViewNames.Any(item => viewName.Equals(item))) {
                    errors.Add(view);
                    continue;
                }

                view.Name = Delimiter.CreateViewName(splittedName);
            }

            transaction.Commit();
        }

        if(errors.Count > 0) {
            Notification(false);
            string message = "Не были изменены имена у следующих видов:"
                             + Environment.NewLine
                             + " - "
                             + string.Join(
                                 Environment.NewLine + " - ",
                                 errors.Select(item => $"{item.Id.GetIdValue()} - {item.Name}"));
            TaskDialog.Show("Предупреждение!", message, TaskDialogCommonButtons.Ok);
        } else {
            Notification(true);
        }
    }
}