Revit怎么导出其他文件格式

 public class ExportToOtherCommand : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIApplication uiapp = commandData.Application;
            UIDocument uidoc = uiapp.ActiveUIDocument;
            Document doc = uidoc.Document;

            string projectName = Path.GetFileNameWithoutExtension(doc.PathName);
            string viewName = doc.ActiveView.Name;

            ////导出Dwf
            //using (Transaction trans = new Transaction(doc, "Export to Dwf file"))
            //{
            //    trans.Start();

            //    ExportToDWF(doc, $"D:\\Shared\\{projectName}_{viewName}.dwf");

            //    trans.Commit();
            //}

            ////导出Nwc
            //ExportToNwc(doc, $"D:\\Shared\\{projectName}_{viewName}.nwc");


            ExportToDwg(doc, $"D:\\Shared\\{projectName}_{viewName}.dwg",false);

            return Result.Succeeded;
        }

        /// <summary>
        /// 导出Nwc文件,不需要开启事务
        /// </summary>
        /// <param name="document"></param>
        /// <param name="pathFullName"></param>

        public void ExportToNwc(Document document, string pathFullName)
        {
            NavisworksExportOptions nweOptions = new NavisworksExportOptions();
            nweOptions.ExportScope = NavisworksExportScope.Model;
            nweOptions.ViewId = document.ActiveView.Id;
            //导出是否包括链接模型
            nweOptions.ExportLinks = true;
            //判断是否安装了Navisworks
            bool isExporterAvailable = OptionalFunctionalityUtils.IsNavisworksExporterAvailable();
            if (isExporterAvailable)
            {
                string folder = Path.GetDirectoryName(pathFullName);
                string name = Path.GetFileNameWithoutExtension(pathFullName);
                document.Export(folder, name, nweOptions);
            }
            else
            {
                TaskDialog.Show("tip", "导出失败！没有安装Navisworks");
            }
        }

        /// <summary>
        /// 导出dwf , 导出需要开启事务
        /// </summary>
        /// <param name="document"></param>
        /// <param name="pathFullName"></param>
        /// <param name="isActiveView"></param>
        public void ExportToDWF(Document document, string pathFullName, bool isActiveView = true)
        {
            FilteredElementCollector collector = new FilteredElementCollector(document);
            collector.OfClass(typeof(View)).OfCategory(BuiltInCategory.OST_Views);

            DWFExportOptions dwfOptions = new DWFExportOptions
            {
                CropBoxVisible = true,
                ExportingAreas = true,
                ExportTexture = false
            };

            ViewSet views = new ViewSet();
            if (isActiveView)
            {
                views.Insert(document.ActiveView);
            }
            else
            {
                //多个视图
                foreach (View view in collector.ToElements())
                {
                    if (view.CanBePrinted)
                    {
                        views.Insert(view);
                    }
                }
            }

            string folder = Path.GetDirectoryName(pathFullName);
            string name = Path.GetFileNameWithoutExtension(pathFullName);

            document.Export(folder,name, views, dwfOptions);
        }


        public void ExportToDwg(Document document, string pathFullName, bool isActiveView = true)
        {
            FilteredElementCollector collector = new FilteredElementCollector(document);
            collector.OfClass(typeof(View)).OfCategory(BuiltInCategory.OST_Views);

            DWGExportOptions dwgOptions = new DWGExportOptions
            {
                FileVersion = ACADVersion.R2010,
            };

            string folder = Path.GetDirectoryName(pathFullName);
            string name = Path.GetFileNameWithoutExtension(pathFullName);

            List<ElementId> viewIds = new List<ElementId>();
            if (isActiveView)
            {
                viewIds.Add(document.ActiveView.Id);
            }
            else
            {
                //多个视图
                foreach (View view in collector.ToElements())
                {
                    if (view.CanBePrinted)
                    {
                        viewIds.Add(view.Id);
                    }
                }
            }

            document.Export(folder, name, viewIds, dwgOptions);
        }
    }