Private sub update date automatically when value in a cell changes - excel

Question

Im trying to automatically update current date in cell T when text in cell Q is "won" and a value in cell AM is > 0. I tried the code below and it is working if first the value in cell is > 0 and then you update the text in cell Q BUT if you do it in another way (first update cell Q and secondly the value in cell AM) the date doesn't appear in cell T.
Any idea, what Im I missing?
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, [Q:Q]) Is Nothing Then
If UCase(Target) = UCase("won") And Target.Offset(, 22) > 0 Then
Target.Offset(, 2) = Int(Now())
End If
End If
End sub

Answer 1

Your code only checks for changes in Q therefore the update does not take place if you change AM first.
My solution has three parts:
use constants for the columns - in case there are changes to the sheet layout you only have to make adjustments here
worksheet_change: only check if one of the columns is affected then call the according sub - by that the reader of the code immediately understands what is going on here
the main routine that inserts the date if condition is met or removes the date if not (maybe you want to adjust this)
Option explicit
Private Const colStatus As String = "Q"
Private Const colValue As String = "AM"
Private Const colDateWon As String = "S"
Private Sub Worksheet_Change(ByVal Target As Range)
Dim c As Range
Set c = Target.Cells(1, 1)
If c.Column = Me.Columns(colStatus).Column Or c.Column = Me.Columns(colValue).Column Then
updateDateWon c.row
End If
End Sub
Private Sub updateDateWon(row As Long)
'--> adjust the name of the sub to your needs
Dim valueToInsert As Variant
With Me
If .Range(colStatus & row) = "won" And .Range(colValue & row) > 0 Then
valueToInsert = Int(Now)
Else
'reset the date in case conditions are not met
valueToInsert = vbNullString
End If
Application.EnableEvents = False 'disable events so that change-event isn't called twice
.Range(colDateWon & row) = valueToInsert
Application.EnableEvents = True
End With
End Sub

Answer 2

A Worksheet Change Applied to Two Non-Adjacent Columns
You need to monitor columns Q and AM for changes.
You need to account for Target being multiple adjacent and non-adjacent cells.
You need to disable events when writing to the worksheet containing this code to not retrigger this event (or trigger any other events).
It is good practice to ensure the re-enabling of events (by using error-handling).
You can combine the cells to be written to (dCell) into a range (drg) and write the stamp in one go.
Int(Now()) or Int(Now) is actually Date.
Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo ClearError
Const sColsAddress As String = "Q:Q,AM:AM"
Const dCol As String = "T"
Const fRow As Long = 2 ' (e.g. 2 for excluding headers in the first row)
Const sCriteria As String = "won"
Dim srg As Range
With Range(sColsAddress)
Set srg = Intersect(.Cells, Rows(fRow).Resize(Rows.Count - fRow + 1))
End With
Dim sirg As Range: Set sirg = Intersect(srg, Target)
If sirg Is Nothing Then Exit Sub
Dim sirg1 As Range: Set sirg1 = Intersect(sirg.EntireRow, srg.Areas(1))
Dim siCol2 As Long: siCol2 = srg.Areas(2).Column
'Dim dirg As Range: Set dirg = sirg1.EntireRow.Columns(dCol) ' not used
Dim siCell1 As Range
Dim siValue2 As Variant
Dim drg As Range
For Each siCell1 In sirg1.Cells
If StrComp(CStr(siCell1.Value), sCriteria, vbTextCompare) = 0 Then
siValue2 = siCell1.EntireRow.Columns(siCol2).Value
If IsNumeric(siValue2) Then
If siValue2 > 0 Then
If drg Is Nothing Then
Set drg = siCell1.EntireRow.Columns(dCol)
Else
Set drg = Union(drg, siCell1.EntireRow.Columns(dCol))
End If
End If
End If
End If
Next siCell1
If Not drg Is Nothing Then
' Prevent retriggering the event when writing to the worksheet.
Application.EnableEvents = False
drg.Value = Now ' only after testing, use 'dDate = Date'
End If
SafeExit:
' Enable events 'at all cost'.
If Not Application.EnableEvents Then Application.EnableEvents = True
Exit Sub
ClearError:
Debug.Print "Run-time error '" & Err.Number & "': " & Err.Description
Resume SafeExit
End Sub