Unique value in a cell

Rozallyn

New Member
Joined
Jan 23, 2019
Messages
6
Hi,

how do I ensure within a range of cells in a worksheet only a unique value can be entered even when pasting into the cell. The data validation function works well for this if the data is typed in but not pasted. Is there a VBA function that I can use?
your help will be greatly appreciated
 

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footoo

Well-known Member
Joined
Sep 21, 2016
Messages
3,396
Office Version
  1. 2016
Platform
  1. Windows
Do you mean prevent duplicates being entered in a certain range ?
 
Last edited:

footoo

Well-known Member
Joined
Sep 21, 2016
Messages
3,396
Office Version
  1. 2016
Platform
  1. Windows
To prevent duplicates in column A :
Code:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rng As Range, r As Range, c As Range
Set rng = [A:A]
Set r = Intersect(rng, Target)
If Not r Is Nothing Then
    For Each c In r
        If WorksheetFunction.CountIf(rng, c) > 1 Then
            Application.EnableEvents = False
            Application.Undo
            Application.EnableEvents = True
            Exit For
        End If
    Next
End If
End Sub
 
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