VB.net 和Cad 连接问题

liaoost

 请各位高手帮忙指导:

为何  db = HostApplicationServices.WorkingDatabase 出错呢

 

请帮一下

 

liaoost

在前面引用了下面

Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.EditorInput
Imports Autodesk.AutoCAD.Colors
Imports Autodesk.AutoCAD.Geometry
Imports Autodesk.AutoCAD.GraphicsInterface
Imports Autodesk.AutoCAD.PlottingServices
Imports Autodesk.AutoCAD.Windows

Imports System.Runtime.InteropServices
Imports DBTransMan = Autodesk.AutoCAD.DatabaseServices.TransactionManager

Imports Autodesk.AutoCAD
Imports Autodesk.AutoCAD.Interop
Imports Autodesk.AutoCAD.Interop.Common
Imports System.IO
Imports System.Math

Dim db As Database
db = Application.DocumentManager.MdiActiveDocument.Database

无法获得当前活动AutoCAD文档所在的数据库,请还有那边要注意呢.

我的软件为:Auto Cad 2006 和 Visual Basic 2005 Express版

liaoost

各位高手问题如下,请指导…谢谢

Imports Autodesk.AutoCAD.DatabaseServices

Imports Autodesk.AutoCAD.Interop
Imports Autodesk.AutoCAD.Interop.Common

Dim _Cad As Autodesk.AutoCAD.Interop.AcadApplication

Cad = New Autodesk.AutoCAD.Interop.AcadApplication 

Dim Open_Cad_File_0 As AcadDocument = Cad.Documents.Open("C:\0\0.dwg")

Dim db As Database = HostApplicationServices.WorkingDatabase ←并未将对象参考设定为对象的执行个体,无法取得获得当前工作空间的数据库