CODEWITHSUNDEEP
vb.netautocadobjectid
daniel aagentah
daniel aagentah

Reputation: 1702

Get ObjectId from AutoCAD

I am currently using VB to add functionality into AutoCAD.

I am trying to get a handle on the ObjectId of my Text Object, I was wondering if there was a way for me to view the ObjectId straight from Autocad (maybe in some type of properties viewer?)

Any help or advice on how i could do this would be helpful, thank you in advance.

Upvotes: 1

Views: 4610

Answers (1)

Augusto Goncalves
Augusto Goncalves

Reputation: 8604

The ObjectId of any AutoCAD entity is for programming use only, there is no UI feature to see it (unless you develop a plugin).

Also, the actual ID number will change from one session to another. It's just a number used to open and manipulate entities in memory faster. The ObjectId is not save into the .dwg file. If you close and open a drawing, all IDs will be different.

Now the Handle is persistent (saved into .dwg files) and don't change between sessions.

NOTE: there are some scenario where the Handle also changes, like for entities inside a block during a BEDIT command.

Here is a quick sample to loop through entities using VBA/ActiveX

Public Sub LoopMText()
    For i = 0 To ThisDrawing.ModelSpace.Count - 1
        If TypeOf ThisDrawing.ModelSpace.Item(i) Is AcadMText Then
            Dim t As AcadMText
            Set t = ThisDrawing.ModelSpace.Item(i)
            If t.TextString = "something here" Then
                ' do something...
            End If
        End If
    Next
End Sub

Upvotes: 7

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