XData problem

Anonymous — Sat, 10 Dec 2011 11:05:53 GMT

I have used Kean Walmsley's article http://through-the-interface.typepad.com/through_the_interface/2007/04/adding_xdata_to.html as a basis for trying to add xdata to a block.

I am trying to add the handle of another object to the block. Here is the code:-

   Private Sub Insert(ByVal tr As Transaction, ByVal Name As String, ByVal Path As String, _
                            ByVal Scale As Integer, ByVal ip As Point3d, ByVal Hwnd As Handle)
      Dim btr As BlockTableRecord = CType(tr.GetObject(CurDb.CurrentSpaceId, OpenMode.ForWrite), BlockTableRecord)
      Dim BlkId As ObjectId = CreateBlockReference(tr, Name, Path, btr)                '  insert blockreference
      Dim blk As BlockReference = New BlockReference(ip, BlkId)                        '  insert block
      blk.SetDatabaseDefaults()
      blk.ScaleFactors = New Scale3d(Scale, Scale, 1)
      blk.Rotation = 0
      btr.AppendEntity(blk)
      tr.AddNewlyCreatedDBObject(blk, True)                                            '  add it to transaction
      AddRegAppTableRecord(tr, "MYXDATA")
      Dim values() As TypedValue = {New TypedValue(1001, "MYXDATA"), New TypedValue(DxfCode.Handle, Hwnd)}
      Dim rb As New ResultBuffer(values)
      blk.XData = rb
      rb.Dispose()
   End Sub
   Private Sub AddRegAppTableRecord(ByVal tr As Transaction, ByVal regAppName As String)
      Dim rat As RegAppTable = DirectCast(tr.GetObject(CurDb.RegAppTableId, OpenMode.ForRead, False), RegAppTable)
      If Not rat.Has(regAppName) Then
         rat.UpgradeOpen()
         Dim ratr As New RegAppTableRecord()
         ratr.Name = regAppName
         rat.Add(ratr)
         tr.AddNewlyCreatedDBObject(ratr, True)
      End If
   End Sub

I get the following error:- eInvalidInput

at the line blk.Xdata = rb

Re: XData problem

Alfred.NESWADBA — Sat, 10 Dec 2011 11:15:27 GMT

Hi,

first guess:

don't use this: New TypedValue(DxfCode.Handle, Hwnd)

instead try this: New TypedValue(DxfCode.ExtendedDataHandle, Hwnd)

The DxfCode.Handle can only exist once for an object, and that's the object's handle, not a referenced handle from another entity.

HTH, - alfred -

Re: XData problem

dgorsman — Mon, 12 Dec 2011 16:00:52 GMT

Let me guess - .Handle is DXF code 5, .ExtendedDataHandle is DXF code 1005?

Re: XData problem

Anonymous — Mon, 12 Dec 2011 17:37:32 GMT

Only way to fly!

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