通过Objectd能获得对象吗

dpec1982 · 发表于 2014-12-18 12:26:00

Autodesk..EditorInput.Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
         Database db = HostApplicationServices.WorkingDatabase;
         PromptSelectionResult pkf = ed.SelectImplied();
         if (pkf.Status != PromptStatus.OK) return;
         ObjectId[] objIds = pkf.Value.GetObjectIds();
         if (objIds.Length > 1)
            Autodesk.AutoCAD.ApplicationServices.Application.ShowAlertDialog("\n请选择一个对象");
         else
         {

            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                  ObjectId id = objIds[0];
                  Entity ent = trans.GetObject(id, OpenMode.ForWrite) as Entity;
                  ent.ColorIndex = 1;
                  trans.Commit();
            }
         }
选择一个对象后，知道该对象的ObjectID，能获取该对象的一些属性吗？每次执行都出错在Entity ent = trans.GetObject(id, OpenMode.ForWrite) as Entity;这句话。希望大侠帮忙看看。不要因为太简单不理我哦

dpec1982 · 发表于 2014-12-18 14:48:00

但我这么写，就能得到这个对象实体
      public void OpenEnt()
      {
         Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
         ed.WriteMessage("通过ObjectId打开对象\n");
         PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象\n");
         PromptEntityResult entRes;
         entRes = ed.GetEntity(entOps);
         if (entRes.Status != PromptStatus.OK)
         {
            ed.WriteMessage("选择对象失败，退出");
            return;
         }
         ObjectId objId = entRes.ObjectId;
         Database db = HostApplicationServices.WorkingDatabase;
         using (Transaction trans = db.TransactionManager.StartTransaction())
         {
            Entity ent = trans.GetObject(objId, OpenMode.ForWrite) as Entity;
            ent.ColorIndex = 1;
            trans.Commit();
         }
      }
方法都是一样的啊，就连得到的ObjectID的值也是一样的，为什么楼上的写法就出错呢

通过Objectd能获得对象吗

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