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我写了一段代码，先画一个圆，再生成面域。结果圆能画出，面域却创建失败，请各位高手看看错在哪？先谢谢了！
Imports Autodesk..ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.Interop
Imports Autodesk.AutoCAD.Interop.Common
Public Class Class1
Public Shared Sub TestTemp()
Dim bt As BlockTable
Dim btr As BlockTableRecord
Dim CenPt As New Point3d(0, 0, 0) '先画一个圆
Dim CircleObj As Circle
Try
Dim db As Database = HostApplicationServices.WorkingDatabase
Dim objId As ObjectId = db.BlockTableId
bt = objId.Open(OpenMode.ForRead)
objId = bt.Item(btr.ModelSpace)
btr = objId.Open(OpenMode.ForWrite)
CircleObj = New Circle
CircleObj.Center = CenPt
CircleObj.Radius = 300
btr.AppendEntity(CircleObj)
Catch
Finally
CircleObj.Close()
btr.Close()
bt.Close()
End Try
Dim Array As DBObjectCollection = New DBObjectCollection '建立一个集合
Array.Add(CircleObj) '将圆添加到集合中
Dim Reginobj As Region
Try
Dim db As Database = HostApplicationServices.WorkingDatabase
Dim objId As ObjectId = db.BlockTableId
bt = objId.Open(OpenMode.ForRead)
objId = bt.Item(btr.ModelSpace)
btr = objId.Open(OpenMode.ForWrite)
ReginObj = New Region
Region.CreateFromCurves(Array)
btr.AppendEntity(Reginobj)
Catch
Finally
Reginobj.Close()
btr.Close()
bt.Close()
End Try
End Sub
End Class
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置顶卡
