number field automatically

[azhar2006]

Hello Guys
I have been working on a number field automatically
I want to add the letters before the numbers
How?
I used one of the examples in the Forum, but I can not add the letters or the name of the

Private Sub Form_Current()
If Me.NewRecord Then
Me!InNr.DefaultValue = Nz(DMax("[InNr]", "Table1"), 0) + 1
End If
End Sub

Example
AW1
AW2
AW3

[June7]

You will have to extract the number part, increment the value then combine with text. Then you should deal with situation of blank db, before records input. Here is sample code:

Function GetInNr
    strInNr = Nz(DMax("InNr", "Table1"), "")
    If strInNr = "" Then
        'this accommodates very first generated number of blank database
        strInNr = "AW1"
    Else
        strInNr = "AW" & Mid(strInNr, 2) + 1
    End If
   GetInNr = strInNr
End Function

You should be aware that alpha sort rules apply. AW129 will sort before AW2. If you want correct sequence, need placeholder zeros, like: AW002, AW010, AW129.

How high do you expect this series to get? I have code that builds a sequential identifier but it starts over each year. The series has never exceeded 4500.

    strLabNum = Nz(DMax("LabNum", "Submit"), "")
    If strLabNum = "" Then
        'this accommodates very first generated number of blank database
        strLabNum = Year(Date) & "A-0001"
    Else
        'this accommodates change in year
        If Left(strLabNum, 4) = CStr(Year(Date)) Then
            strLabNum = Left(strLabNum, 6) & Format(Right(strLabNum, 4) + 1, "0000")
        Else
            strLabNum = Year(Date) & "A-0001"
        End If
    End If

[azhar2006]

Thank you very much June7
But it seems to me an error
Please see DB

[June7]

Don't refer to form in DMax, refer to table.

All domain aggregate functions must refer to table or query, not form or report.

Why do you need to have this value in table? It can be dynamically generated on report. Textbox on report has a RunningSum property.

Do you really want to use my exact code? The resulting construct will be like: 2014A-0001

[azhar2006]

Yes
That good
Is just a number for the Invoice
I needed was in the searches also
What is your opinion
What is the change DB

[June7]

Options:

1. Use the autonumber value as the invoice number. You can format this to display however you want, such as: "AW" & Format([OrderID], "0000") - no VBA required. However, there is no guarantee the autonumber will be sequential nor that it will be a positive integer (although I have never seen negative).

2. Use suggested code to generate and store unique identifier

Decision depends on your requirements. Is the invoice number accountable - meaning must be in sequence with no gaps? Must every number be accounted for? In my case the answer is yes and is why I use the code method.

[azhar2006]

Thank you June7
I am what I want is the serial number of the Invoice
This figure is before the code for the type of material or the company code
Where when adding a new date for the invoice number is added before or followed by a new company code

[June7]

Then does the suggested code work for you?