Help with deleting multiple copies of blocks (not anon) with selection set

[_gile]

Hi,

Here's what could be your 'Eraser' method. I also made some changes (removed unusefull statements) to the BlockTest one.
It seems to work (VB is not at all my favorite language).

        Private Sub Eraser()
            Dim doc As Document = Application.DocumentManager.MdiActiveDocument
            Dim db As Database = doc.Database
            Dim ed As Editor = doc.Editor
            Dim filter As TypedValue() = {New TypedValue(0, "INSERT"), New TypedValue(2, "Standard,Compact,Handicap,Van")}
            Dim psr As PromptSelectionResult = ed.SelectAll(New SelectionFilter(filter))
            If psr.Status <> PromptStatus.OK Then
                Return
            End If
            Using doc.LockDocument()
                Using tr As Transaction = db.TransactionManager.StartTransaction()
                    For Each id As ObjectId In psr.Value.GetObjectIds()
                        Dim br As BlockReference = DirectCast(tr.GetObject(id, OpenMode.ForWrite), BlockReference)
                        br.[Erase]()
                    Next
                    tr.Commit()
                End Using
            End Using
        End Sub

        Private Sub BlockTest(blockName As String)
            Dim doc As Document = Application.DocumentManager.MdiActiveDocument
            Dim db As Database = doc.Database
            Dim ed As Editor = doc.Editor
            Using doc.LockDocument()
                Using tr As Transaction = db.TransactionManager.StartTransaction()
                    Dim blockTable As BlockTable = DirectCast(tr.GetObject(db.BlockTableId, OpenMode.ForRead), BlockTable)
                    If Not blockTable.Has(blockName) Then
                        ed.WriteMessage(vbLf & "{0} block does not exist, now inserting source file!", blockName)
                        Dim filename As String = "C:\mkacadd_Hybrid\Civil3D\CAD data\Support\Blocks\StallCount.dwg"
                        Dim blkId As ObjectId
                        Using dbdwg As New Database(False, True)
                            dbdwg.ReadDwgFile(filename, FileShare.Read, True, "")
                            blkId = db.Insert(Path.GetFileNameWithoutExtension(filename), dbdwg, True)
                        End Using
                        ' Purge StallCount block
                        Dim btr As BlockTableRecord = DirectCast(tr.GetObject(blkId, OpenMode.ForWrite), BlockTableRecord)
                        btr.[Erase]()
                    End If
                    Me.Hide()
                    Dim id As ObjectId = blockTable(blockName)
                    Dim modelSpace As BlockTableRecord = _
                        DirectCast(tr.GetObject(blockTable(BlockTableRecord.ModelSpace), OpenMode.ForWrite), BlockTableRecord)
                    Dim ppo As New PromptPointOptions(vbLf & "Specify insertion point, (press ESC, SHIFT or ENTER to return): ")
                    ppo.AllowNone = True
                    Dim pao As New PromptAngleOptions(vbLf & "Specifiy the rotation: ")
                    pao.UseBasePoint = True
                    pao.DefaultValue = 0.0
                    pao.UseDefaultValue = True
                    While True
                        Dim ppr As PromptPointResult = ed.GetPoint(ppo)
                        If ppr.Status <> PromptStatus.OK Then
                            Exit While
                        End If
                        Dim pts As Point3d = ppr.Value
                        pao.BasePoint = pts
                        Dim pdr As PromptDoubleResult = ed.GetAngle(pao)
                        If pdr.Status = PromptStatus.Cancel Then
                            Exit While
                        End If
                        Dim angle As Double = pdr.Value
                        Dim br As New BlockReference(pts, id)
                        br.Rotation = angle
                        br.TransformBy(ed.CurrentUserCoordinateSystem)
                        modelSpace.AppendEntity(br)
                        tr.AddNewlyCreatedDBObject(br, True)
                        db.TransactionManager.QueueForGraphicsFlush()
                    End While
                    tr.Commit()
                End Using
            End Using
            Counter()
            Me.Show()
        End Sub

[cmccartney]

ahhh. i think i forgot the "doc.lockdocument" part when i was trying earlier. so got it to work now. One oddity, i assume this is happening because its being initiated from a windows form, but it does not actually erase anything until after the form is closed. Which is fine since erasing everything should be the last thing you are doing anyways.

 Private Sub eraser()
        Dim doc As Document = Application.DocumentManager.MdiActiveDocument
        Dim db As Database = doc.Database
        Dim ed As Editor = doc.Editor
        Dim filter As TypedValue() = {New TypedValue(0, "INSERT"), New TypedValue(2, "Standard,Compact,Handicap,Van")}
        Dim psr As PromptSelectionResult = ed.SelectAll(New SelectionFilter(filter))
        If psr.Status <> PromptStatus.OK Then
            Return
        End If
        doc.LockDocument()
        Using tr As Transaction = db.TransactionManager.StartTransaction()
            For Each id As ObjectId In psr.Value.GetObjectIds()
                Dim br As BlockReference = DirectCast(tr.GetObject(id, OpenMode.ForWrite), BlockReference)
                br.Erase()
            Next
            tr.Commit()
        End Using
        Me.Close()
        Application.SetSystemVariable("clayer", Laycurrent.laycur)
    End Sub

Thanks again for the help guys.

[_gile]

You should explicitly call Dispose() on the doc.LockDocument()

Using doc.LockDocument()
    '...
End Using