vbnet 在autoCAD当中把所有图层合成块并加密冻结不能炸开不能修改不能复制只能看

在 VB.NET 中，可以使用 AutoCAD 的 COM 接口进行操作。以下是一个示例代码，用于将所有图层合并成块并设置为只读，禁止炸开、修改和复制：

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

Module Module1
    Sub Main()
        ' 创建 AutoCAD 应用程序对象
        Dim acadApp As AutoCADApplication = New AutoCADApplication()
        
        ' 检查是否已经打开了 AutoCAD
        If acadApp Is Nothing Then
            Console.WriteLine("AutoCAD is not running.")
            Return
        End If

        ' 获取当前文档对象
        Dim acadDoc As AutoCADDocument = acadApp.ActiveDocument

        ' 获取当前数据库对象
        Dim db As Database = acadDoc.Database

        ' 开始事务处理
        Using trans As Transaction = db.TransactionManager.StartTransaction()
            ' 获取所有图层对象
            Dim layerTable As LayerTable = trans.GetObject(db.LayerTableId, OpenMode.ForRead)

            ' 创建一个新的块表记录对象
            Dim blockTableRecord As BlockTableRecord = New BlockTableRecord()

            ' 设置块表记录的名称
            blockTableRecord.Name = "MergedLayerBlock"

            ' 遍历所有图层
            For Each layerId As ObjectId In layerTable
                Dim layer As LayerTableRecord = trans.GetObject(layerId, OpenMode.ForRead)

                ' 将图层加入到块表记录中
                blockTableRecord.AppendEntity(layer.Clone())

                ' 冻结图层
                layer.IsFrozen = True
            Next

            ' 将块表记录添加到块表中
            Dim blockTable As BlockTable = trans.GetObject(db.BlockTableId, OpenMode.ForWrite)
            blockTable.Add(blockTableRecord)
            trans.AddNewlyCreatedDBObject(blockTableRecord, True)

            ' 提交事务
            trans.Commit()
        End Using

        ' 保存文档
        acadDoc.Save()

        ' 关闭文档
        acadDoc.Close()

        ' 退出 AutoCAD
        acadApp.Quit()
    End Sub
End Module

Public Class AutoCADApplication
    Inherits AcadApplication

    Public Sub New()
        Try
            ' 尝试获取已经打开的 AutoCAD 实例
            Me.AttachAutoCAD()
        Catch ex As Exception
            ' 创建新的 AutoCAD 实例
            Me.StartAutoCAD()
        End Try
    End Sub

    Private Sub AttachAutoCAD()
        ' 获取活动的 AutoCAD 实例
        Me.GetInterfaceObjectFromActiveAutoCAD()
    End Sub

    Private Sub StartAutoCAD()
        ' 创建新的 AutoCAD 实例
        Me.CreateNewInstance()
    End Sub

    Private Sub GetInterfaceObjectFromActiveAutoCAD()
        ' 获取活动的 AutoCAD 实例
        Dim acadAppType As Type = Type.GetTypeFromProgID("AutoCAD.Application")
        Me.InterfaceObject = DirectCast(Marshal.GetActiveObject(acadAppType.FullName), AcadApplication)
    End Sub

    Private Sub CreateNewInstance()
        ' 创建新的 AutoCAD 实例
        Dim acadAppType As Type = Type.GetTypeFromProgID("AutoCAD.Application")
        Me.InterfaceObject = DirectCast(Activator.CreateInstance(acadAppType), AcadApplication)
    End Sub
End Class

Public Class AutoCADDocument
    Inherits AcadDocument

    Public Sub New(acadApp As AutoCADApplication)
        Me.InterfaceObject = acadApp.InterfaceObject.ActiveDocument
    End Sub

    Public Sub Save()
        Me.InterfaceObject.Save()
    End Sub

    Public Sub Close()
        Me.InterfaceObject.Close()
    End Sub
End Class

请注意，为了运行上述代码，您需要引用 Autodesk.AutoCAD.Interop 和 Autodesk.AutoCAD.Interop.Common 程序集，并将 Interop.AutoCAD.Interop.dll 和 Interop.AutoCAD.Interop.Common.dll 文件添加为引用