Hi @ngdnam88 . This code takes ViewRepresentations from the first component (line 11).
Sub main()
Dim oIvnApp As Inventor.Application = ThisApplication
Dim oDoc As Document = oIvnApp.ActiveDocument
If Not TypeOf oDoc Is AssemblyDocument Then Exit Sub
Dim oAsmDoc As AssemblyDocument = oDoc
Dim oOccs As ComponentOccurrences = oAsmDoc.ComponentDefinition.Occurrences
If oOccs.Count = 0 Then Exit Sub
Dim oRepMng As RepresentationsManager = oAsmDoc.ComponentDefinition.RepresentationsManager
Dim oActView As DesignViewRepresentation = oRepMng.ActiveDesignViewRepresentation
Dim oAsmViewReps As DesignViewRepresentations = oRepMng.DesignViewRepresentations
Dim oOcc As ComponentOccurrence = oOccs(1)
Dim oPartDef As PartComponentDefinition = oOcc.Definition
Dim oViewReps As DesignViewRepresentations = oPartDef.RepresentationsManager.DesignViewRepresentations
For Each oViewRep As DesignViewRepresentation In oViewReps
Dim oAsmViewRep As DesignViewRepresentation
Try
oAsmViewRep = oAsmViewReps(oViewRep.Name)
Catch
oAsmViewRep = oAsmViewReps.Add(oViewRep.Name)
End Try
oAsmViewRep.Activate()
oViewRep.Activate()
Next
oActView.Activate()
End Sub