topic Re: How to check BlockReference in .NET Forum

How to check BlockReference

Anonymous — Thu, 03 Jan 2013 11:54:36 GMT

HI all.

So i have 3 file DWG :

3.dwg : is a plan 'archi'
2.dwg is a plan with only décoration.
1. dwg is a plan with only the water.

i have this structure in my file (1.dwg) :

1.dwg
---> 2..dwg
---------> 3.dwg (this file is a Xref of 2.dwg)

--> is the blockRefecence (XRef).

my code :

        Dim CollXref As New ObjectIdCollection

        Dim mydb As Database = Application.DocumentManager.MdiActiveDocument.Database 
        Dim myTrans As Transaction = mydb.TransactionManager.StartTransaction
        '
        Dim doc As Document = Application.DocumentManager.MdiActiveDocument
        Dim DocLock As DocumentLock = doc.LockDocument

        Try
            
            Dim BlocTable As BlockTable = CType(myTrans.GetObject(mydb.BlockTableId, OpenMode.ForRead), BlockTable)
            For Each btid As ObjectId In BlocTable
                Dim DefBloc As BlockTableRecord = CType(myTrans.GetObject(btid, OpenMode.ForWrite), BlockTableRecord)
                '
                If DefBloc.IsFromExternalReference = True Then
                    If DefBloc.IsResolved = False Then
                       ....
                    Else
                        CollIdXref.Add(btid)
                    End If
                End If
            Next
            myTrans.Commit()
        Catch ex As Exception
            MsgBox(ex.Message, vbOKOnly & vbCritical, "ee")
        Finally
            myTrans.Dispose()
        End Try
        DocLock.Dispose()
        DocLock = Nothing

So i don't want to add Id of a Xref From a Xref. (In my example i want only ObjectId of the 2.dwg not 3.dwg if i launch this code on 1.dwg.

How i can do that ?

Re: How to check BlockReference

Anonymous — Fri, 04 Jan 2013 22:14:14 GMT

You can use the XRef Graph to determine if an XRef is nested. Here is a blog post that shows how to use the XRefGraph type:

http://adndevblog.typepad.com/autocad/2012/06/finding-all-xrefs-in-the-current-database-using-cnet.html

Cheers

Gopinath

Re: How to check BlockReference

Anonymous — Sat, 05 Jan 2013 10:56:32 GMT

Thx i have to see that

Re: How to check BlockReference

Anonymous — Sun, 06 Jan 2013 10:43:16 GMT

Here my code final :

                Dim LockDoc As DocumentLock = doc.LockDocument
                Dim OkErr as boolean = false
                Dim CollXRef As New ObjectIdCollection
                Do
                    CollXRef.Clear()
                    Dim xg As XrefGraph = db.GetHostDwgXrefGraph(True)
                    Dim root As GraphNode = xg.RootNode

                    Using tr As Transaction = db.TransactionManager.StartTransaction

                        For o = 0 To root.NumOut - 1 Step 1
                            Dim child As XrefGraphNode = CType(root.Out(o), XrefGraphNode)

                            If child.XrefStatus = XrefStatus.Resolved Then
                                Dim bl As BlockTableRecord = tr.GetObject(child.BlockTableRecordId, OpenMode.ForRead)

                                'ed.WriteMessage(vbCrLf & i_indent + child.Database.Filename)

                                ' Name of the Xref (found name)

                                ' You can find the original path too:
                                If bl.IsFromExternalReference = True Then
                                    ed.WriteMessage(vbCrLf & "Xref path name: " + bl.PathName)
                                    CollXRef.Add(bl.ObjectId)
                                    Exit For
                                End If
                            End If
                        Next

                        'trouvé un xref --> Adding

                        If CollXRef.Count > 0 Then
                            Try
                                doc.Database.BindXrefs(CollXRef, False)

                            Catch ex As Exception
                                okErr = True
                                MsgBox("Erreur lors de la liaison d'un Xref" & vbCrLf & "--> Essayer de lier le premier niveau", _
                                              vbOKOnly & vbCritical, _
                                              "Erreur Système")
                            Finally
                                tr.Commit()
                            End Try
                        End If
                    End Using
                    ed.WriteMessage(vbCrLf & "-> " & CollXRef.Count.ToString)
                Loop Until (CollXRef.Count = 0) Or (okErr = True)

                LockDoc.Dispose()
                LockDoc = Nothing

If check only one XRef. it is for the binf of only one XREF.

I have big file to bing and if i bing all in one troke, autocad crack for a 'Out of mémory'

I can't check it now (i am not on my work). So i don't know if i have resolve this case of out of memory.