块参照与PropertyGrid的绑定问题

davehuhudave · 发表于 2010-7-28 08:34:00

我把某一块参照与PropertyGrid进行了绑定，但是修改PropertyGrid属性时候就出错并提示为非写状态，但是我明明给这个块参照写操作Enable了，望版主指教
            Dim lock As DocumentLock = AcadApp.DocumentManager.MdiActiveDocument.LockDocument()
            Using trans As Transaction = db.TransactionManager.StartTransaction()
                  Dim brf2 As AttributeReference = trans.GetObject(id, OpenMode.ForWrite)
                  Me.PropertyGrid1.SelectedObject = brf2
            End Using
            lock.Dispose()