Topic: Deleting Dynamic Blocks

[Jeff H]

This is copied from http://www.cadtutor.net/forum/showthread.php?55948-.NET-Getting-a-block-name

I did not know how to insert pictures so posted here

When you change the properties of a dynamic block it creates an anonymous block.

This is a simple example to delete the block references and delete the block references of the anonymous blocks created by the dynamic block.

 

Is hard-coded for a block named "C"

Code: [Select]

  <CommandMethod("DeleteAllBlockReference")> _
        Public Sub DeleteAllBlockReference()
            Dim doc As Document = Application.DocumentManager.MdiActiveDocument
            Dim db As Database = doc.Database

            Using trx As Transaction = db.TransactionManager.StartTransaction()

                Dim bt As BlockTable = db.BlockTableId.GetObject(OpenMode.ForRead)

                Dim btr As BlockTableRecord = bt("C").GetObject(OpenMode.ForRead)

                For Each objId As ObjectId In btr.GetBlockReferenceIds(True, True)
                    Dim ent As Entity = objId.GetObject(OpenMode.ForWrite)
                    ent.Erase()
                Next


                Dim anonBlkIds As ObjectIdCollection = btr.GetAnonymousBlockIds

                For Each btrObjId As ObjectId In anonBlkIds
                    Dim anonBtr As BlockTableRecord = btrObjId.GetObject(OpenMode.ForRead)

                    For Each objId As ObjectId In anonBtr.GetBlockReferenceIds(True, True)
                        Dim ent As Entity = objId.GetObject(OpenMode.ForWrite)
                        ent.Erase()
                    Next

                Next



                trx.Commit()

            End Using

        End Sub

The first pic shows 10 or so dynamic blocks inserted.

The second pic shows after 4 of the dynamic properties have been changed