vb.netcad连接 vbnet cad

vb.net打开cad画图的问题？

你去查查书吧，书上挺详细的，在这说不好说，你先在项目里引用。然后 Dim acadapp As AcadApplication Dim acaddoc As AcadDocument On Error Resume Next AcadApp = GetObject(, "AutoCAD.Application") If Err.Number Then Err.Clear() AcadApp = CreateObject("AutoCAD.Application") If Err.Number Then MsgBox("不能运行AutoCAD,请检查是否安装了AutoCAD") Exit Sub End If End If AcadApp.Visible = True '界面可视

相关问答

Q1: VB2010版中怎么用用OLE控件连接CAD软件，显示CAD图形？会的给段代码

vb2010(vb.net）貌似已经没有OLE控件

下面的代码是用PictureBox控件显示CAD的DWG文件

  Private Structure BITMAPFILEHEADER

        Dim bfType As Short

        Dim bfSize As Integer

        Dim bfReserved1 As Short

        Dim bfReserved2 As Short

        Dim bfOffBits As Integer

    End Structure

Public Function GetDwgImage(ByVal FileName As String) As Image

        If Not File.Exists(FileName) Then Exit Function

        Dim DwgF As FileStream    '文件流

        Dim PosSentinel As Integer  '文件描述块的位置

        Dim br As BinaryReader  '读取二进制文件

        Dim TypePreview As Integer '缩略图格式

        Dim PosBMP As Integer '缩略图位置

        Dim LenBMP As Integer '缩略图大小

        Dim biBitCount As Short '缩略图比特深度

        Dim biH As BITMAPFILEHEADER 'BMP文件头，DWG文件中不包含位图文件头，要自行加上去

        Dim BMPInfo() As Byte  '包含在DWG文件中的BMP文件体

        Dim BMPF As New MemoryStream  '保存位图的内存文件流

        Dim bmpr As New BinaryWriter(BMPF) '写二进制文件类

        Dim myImg As Image

        Try

            DwgF = New FileStream(FileName, FileMode.Open, FileAccess.Read)    '文件流

            br = New BinaryReader(DwgF)

            DwgF.Seek(13, SeekOrigin.Begin) '从第十三字节开始读取

            PosSentinel = br.ReadInt32 '第13到17字节指示缩略图描述块的位置

            DwgF.Seek(PosSentinel + 30, SeekOrigin.Begin) '将指针移到缩略图描述块的第31字节

            TypePreview = br.ReadByte '第31字节为缩略图格式信息，2 为BMP格式，3为WMF格式

            Select Case TypePreview

                Case 1

                Case 2, 3

                    PosBMP = br.ReadInt32 'DWG文件保存的位图所在位置

                    LenBMP = br.ReadInt32 '位图的大小

                    DwgF.Seek(PosBMP + 14, SeekOrigin.Begin) '移动指针到位图块

                    biBitCount = br.ReadInt16 '读取比特深度

                    DwgF.Seek(PosBMP, SeekOrigin.Begin) '从位图块开始处读取全部位图内容备用

                    BMPInfo = br.ReadBytes(LenBMP)  '不包含文件头的位图信息

                    br.Close()

                    DwgF.Close()

                    With biH  '建立位图文件头

                        .bfType = H4D42

                        If biBitCount  9 Then .bfSize = 54 + 4 * (2 ^ biBitCount) + LenBMP Else .bfSize = 54 + LenBMP

                        .bfReserved1 = 0 '保留字节

                        .bfReserved2 = 0 '保留字节

                        .bfOffBits = 14 + H28 + 1024 '图像数据偏移

                    End With

                    '以下开始写入位图文件头

                    bmpr.Write(biH.bfType) '文件类型

                    bmpr.Write(biH.bfSize) '文件大小

                    bmpr.Write(biH.bfReserved1) '0

                    bmpr.Write(biH.bfReserved2) '0

                    bmpr.Write(biH.bfOffBits) '图像数据偏移

                    bmpr.Write(BMPInfo) '写入位图

                    BMPF.Seek(0, SeekOrigin.Begin) '指针移到文件开始处

                    myImg = Image.FromStream(BMPF) '创建位图文件对象

                    Return myImg

                    bmpr.Close()

                    BMPF.Close()

            End Select

        Catch ex As Exception

            Return Nothing

        End Try

      

    End Function

Q2: VB.Net读取AutoCAD图纸

如果可以的话请把分给我

以下是cad2007版的，引用autocad 2007 type library 和autocad/objectdbx common 17如果是04或者版本更低的只要引用autocad 2007 type library，代码的话大同小异，思路是一样的

 

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        On Error Resume Next

        Dim acadapp As Autodesk.AutoCAD.Interop.AcadApplication

acadapp = GetObject(vbNullString, "autoCAD.application")

        Dim acaddoc As Autodesk.AutoCAD.Interop.AcadDocument

        acaddoc = acadapp.ActiveDocument

        Dim Ms As Autodesk.AutoCAD.Interop.Common.AcadModelSpace

        Ms = acaddoc.ModelSpace

        Dim acadObjectI As Autodesk.AutoCAD.Interop.Common.AcadObject

        Dim Linei As Autodesk.AutoCAD.Interop.Common.AcadLine

        Dim Circlei As Autodesk.AutoCAD.Interop.Common.AcadCircle

        Dim Polylinei As Autodesk.AutoCAD.Interop.Common.AcadPolyline

        Dim pt As Autodesk.AutoCAD.Interop.Common.AcadPoint

For Each acadObjectI In Ms

            Debug.Print(acadObjectI.ObjectName)

            Select Case acadObjectI.ObjectName

                Case "AcDbLine"

                    Linei = acadObjectI

                    Debug.Print("X =" Linei.StartPoint(0).ToString)

                    Debug.Print("Y =" Linei.StartPoint(1).ToString)

                Case ""

                Case ""

End Select

Next

    End Sub

Q3: VB.NET连接AutoCAD出错

这个是vb.net教材里面的吧，我也是前两天刚下的。遇到类似的问题，下面是我的解决办法

首先要参考引用Autodesk.AutoCAD.Interop.dll还有Autodesk.AutoCAD.Interop.Common.dll

然后代码有两处也需要相应修改，我用的是.NET 的 vb2008

'Dim AcadApp As AutoCAD.AcadApplication

Dim AcadApp As Autodesk.AutoCAD.Interop.AcadApplication

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Call 连接AutoCAD()

End Sub

Sub 连接AutoCAD()

On Error Resume Next

AcadApp = GetObject(, "AutoCAD.Application")

If Err.Number Then

Err.Clear()

AcadApp = CreateObject("AutoCAD.Application")

If Err.Number Then

MsgBox("不能运行AutoCAD,请检查是否安装了AutoCAD")

Exit Sub

End If

End If

AcadApp.Visible = True '界面可视

'AcadApp.WindowState = AutoCAD.AcWindowState.acMax '界面最大化

AcadApp.WindowState = Autodesk.AutoCAD.Interop.Common.AcWindowState.acMax

AppActivate(AcadApp.Caption) '显示AutoCAD界面

End Sub