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Excel / Unique ID

Hi Experts,

I have tried to obtain code off the net and make changes to it, but nothing is working. I have a userform
that works great for entering data into sheet 1. I was using a basic formula in column L to concatenate fields together to make a unique ID. When I copy this formula down it then makes the userform write to the wrong row in sheet 1 when data is entered.
I'm wondering is it possible to automatically concatenate column (E, C, and K) together using VBA according to when the rows of data are entered. Is there some kind of change event in VBA that can achieve this in column L? Is it possible to have it automatically do this without any user interference or button etc.

Many Thanks in advance, I have attached a sample sheet in excel.
SampleUniqueID.xlsx
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JKCC
Asked:
JKCC
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2 Solutions
 
patrickabCommented:
JKCC,

The file does not contain a UserForm nor does it contain any VBA code. Please upload your file with both the UserForm and the code you are currently using - albeit with errors.

Patrick
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JKCCAuthor Commented:
I can't because it is confidential information. That is why I created a simple dummy attached with a very basic sample. If it is not possible than I will have to look for other ways of achieving this. I'm just really after column L concatenating the 3 fields together as the rows are populated. E.g. as row one is populated than, column L should populate with the concatenation and so on through VBA. Is it that this has to be in the userform or can it be a separate module specificually for sheet1? I currently do the basica formula in sheet1 and not on the userform.

I'm new to all of this and have had lots of help getting this done so I'm still learning ALOT!!!!

Thanks heaps!

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JKCCAuthor Commented:
Can it be based on according to column A. So when column A is populated, then column L would generate the concatenation via VBA in the corresponding row etc? I dunno, just a thought. I'm not specifically after a unique ID being generated just the count down and the concatenatin via vba. Hope this helps a little. Anythig to get me started would be great.

Cheers,
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byundtCommented:
You can use a worksheet event sub that will populate column L without a formula. This sub must be placed in the code pane for the worksheet, and won't work at all anywhere else.
Private Sub Worksheet_Change(ByVal Target As Range)
Dim cel As Range, rw As Range, targ As Range
Dim n As Long
n = ActiveSheet.UsedRange.Row + ActiveSheet.UsedRange.Rows.Count - 1 'Number of last row with data
Set targ = Union([C2].Resize(n - 1, 1), [E2].Resize(n - 1, 1), [K2].Resize(n - 1, 1))
Set targ = Intersect(targ, Target)
If targ Is Nothing Then Exit Sub

Application.EnableEvents = False
For Each rw In targ.EntireRow.Rows
    With rw
        If Application.CountA(.Cells(3), .Cells(5), .Cells(11)) = 3 Then
            .Cells(12) = Left(.Cells(5), 2) & .Cells(3) & .Cells(11)
        Else
            .Cells(12) = ""
        End If
    End With
Next
Application.EnableEvents = True
End Sub

Open in new window

SampleUniqueIDQ26403446.xlsm
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patrickabCommented:
JKCC,

The code below is in the attached file. When a change is made in column 1 of Sheet1, the formula you have specified is placed automatically on the same row in column L.

Patrick
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rng As Range
Dim celle As Range

With Sheets("Sheet1")
    Set rng = .Range(.Cells(2, "A"), .Cells(.Rows.Count, "A").End(xlUp))
    If Not Intersect(rng, Target) Is Nothing Then
        .Cells(Target.Row, 12).FormulaR1C1 = "=CONCATENATE(LEFT(RC[-7],3),"""",RC[-9],RC[-1])"
    End If
End With

End Sub

Open in new window

SampleUniqueID-01.xls
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byundtCommented:
Although it didn't make any difference with your sample data, I had the wrong number of characters from column E. It should have been 3 in statement 13.
Private Sub Worksheet_Change(ByVal Target As Range)
Dim cel As Range, rw As Range, targ As Range
Dim n As Long
n = ActiveSheet.UsedRange.Row + ActiveSheet.UsedRange.Rows.Count - 1 'Number of last row with data
Set targ = Union([C2].Resize(n - 1, 1), [E2].Resize(n - 1, 1), [K2].Resize(n - 1, 1))
Set targ = Intersect(targ, Target)
If targ Is Nothing Then Exit Sub

Application.EnableEvents = False
For Each rw In targ.EntireRow.Rows
    With rw
        If Application.CountA(.Cells(3), .Cells(5), .Cells(11)) = 3 Then
            .Cells(12) = Left(.Cells(5), 3) & .Cells(3) & .Cells(11)
        Else
            .Cells(12) = ""
        End If
    End With
Next
Application.EnableEvents = True
End Sub

Open in new window

SampleUniqueIDQ26403446.xlsm
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JKCCAuthor Commented:
Thanks experts...both solutions work great.
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patrickabCommented:
JKCC - Thanks for the grade and points - Patrick
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