外部命令的方式载入族并交互式放置

Revit二次开发—载入族并交互式放置, public class LoadClanInform : IExternalEventHandler     {         public string ClanPath { get; set; }         public FormGouJianWu mainForm { get; set; }         public void Execute(UIApplication app)         {             //File.AppendAllText(@"H:\abc.txt", "IExternalEventHandler " + DateTime.Now.ToString() + "\n");             Document doc = app.ActiveUIDocument.Document;             UIDocument uiDoc = app.ActiveUIDocument;             Family family = null;