Auto number a field in a form that isn't an autonumber field.
Posted on 2015-02-21
I am using the following in my "before insert" event on a subform:
Me.txtLineNo = Me.CurrentRecord
As long as my work flow is linear and no lines are ever deleted from the records, it works as intended. I am getting some unexpected and undesirable results however when my workflow is not linear, for instance a line is deleted and I add another line at a later date, the line numbering will repeat previously used numbers. What I need is a function or some code which will determine what my maximum number is in the list, and will +1 to it, and insert it into the linenumber control. Does anyone have a simple solution for this?
I tried this public function I pinched from Stephen Lebans, but could never get it to work as I thought it should:
'Copyright Stephen Lebans 1999
'May not be resold
'Please include my 1 line Copyright notice
'in your code if you use these functions
'I left a bunch of development code in here in case anyone decides to go
'down the same paths I did.
'Created by Stephen Lebans with help from Chris Bergmans
' Updated by Allen Browne Oct/2002
'Production version of GetLineNumberForm
'Works in Form or SubForm mode
'Set controlsource of unbound Text box to
'Type exactly as above
Public Function RowNum(frm As Form) As Variant
On Error GoTo Err_RowNum
'Purpose: Numbering the rows on a form.
'Usage: Text box with ControlSource of: =RowNum([Form])
.Bookmark = frm.Bookmark
RowNum = .AbsolutePosition + 1
If Err.Number <> 3021& Then 'Ignore "No bookmark" at new row.
Debug.Print "RowNum() error " & Err.Number & " - " & Err.Description
RowNum = Null
Thanks in advance.