Revit二次开发示例：DesignOptions

本例只要演示Revit的类过滤器的用法，在对话框中显示DesignOption元素。

#region Namespaces
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;
#endregion

namespace DesignOptionReader
{
    [Autodesk.Revit.Attributes.Transaction(TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(RegenerationOption.Manual)]
    [Autodesk.Revit.Attributes.Journaling(JournalingMode.NoCommandData)]
    public class Command : IExternalCommand
    {
        public Result Execute(
          ExternalCommandData commandData,
          ref string message,
          ElementSet elements)
        {
            try
            {
                Application application = commandData.Application.Application;
                ElementClassFilter filter = new ElementClassFilter(typeof(Autodesk.Revit.DB.DesignOption));
                FilteredElementCollector collector = new FilteredElementCollector(commandData.Application.ActiveUIDocument.Document);
                collector.WherePasses(filter);
                IEnumerator iter = collector.GetElementIdIterator();
                Element element;
                ElementSet designOptions = new ElementSet();

                while (iter.MoveNext())
                {
                    element = iter.Current as Element;
                    if (element.GetType().Equals(typeof(Autodesk.Revit.DB.DesignOption)))
                    {
                        designOptions.Insert(element);
                    }
                }

                if (designOptions.Size > 0)
                {
                    DesignOptionsDialog dialog = new DesignOptionsDialog();

                    foreach (Element elem in designOptions)
                    {
                        dialog.DesignOptionsList.Items.Add(elem.Name);

                    }
                    dialog.ShowDialog();
                }
                else
                {
                    TaskDialog.Show("DesignOptions","There are no design options in this document");
                }

            }
            catch (Exception ex)
            {
                message = ex.Message;
                return Result.Failed;
            }

            return Result.Succeeded;
        }
    }
}