Revit二次开发之“类别Category”

Revit元素分为六类。

Model,Sketch,View,Group,Annotation,Information

模型，草图，视图，组，注释，信息

Model包括Wall,Duct,FamilyInstance之类。

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

using WinForm = System.Windows.Forms;

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

using Autodesk.Revit.DB.Mechanical;
using Autodesk.Revit.UI.Selection;
using Autodesk.Revit.ApplicationServices;

using Autodesk.Revit.DB.Structure;

using System.Xml;

namespace RevitCodes
{
    [Transaction(TransactionMode.Manual)]
    [Regeneration(RegenerationOption.Manual)]
    public class cmdCategory : IExternalCommand
    {
        public Result Execute(ExternalCommandData cmdData, ref string msg, ElementSet elements)
        {
            UIDocument uiDoc = cmdData.Application.ActiveUIDocument;

            Transaction ts = new Transaction(uiDoc.Document, "delete");
            ts.Start();

            Settings docSettings = uiDoc.Document.Settings;
            Categories groups = docSettings.Categories;
            string prompt = "当前文档类别数量：" + groups.Size;
            Category floorCate = groups.get_Item(BuiltInCategory.OST_Floors);
            prompt += floorCate.Name;
            WinForm.MessageBox.Show(prompt, "Revit", WinForm.MessageBoxButtons.OK);

            ts.Commit();

            return Result.Succeeded;
        }
    }
}

from:http://revit.5d6d.com/thread-1256-1-1.html