Excel VBA prevent deletion of cells but allow edit - vba

Question

I have made a spreadsheet which a user can enter a postcode and a quantity into 2 cells and I have other cells doing calculations and displaying the results.
I have added some VBA to prevent anyone from deleting rows and columns but I would like to prevent deletion of any cell within a range but also allow a user to make changes to certain cells but also prevent editing of cells with formula in there.
In cell E4, the user can enter a postcode. In E6, the user can enter a quantity. These can be edited but not deleted. E8:E9 and E11:E14 are all drop down lists (validation) which hold data from lists. These can be changed using the drop down but not deleted.
L10:L14, L16, L23:L27, L29, L30:L33 can all have their data edited but not deleted.
What would the VBA for this look like? I guess it would use the Worksheet_Change() event.

Answer 1

Is this what you are trying? Users can edit cell E4 and E6 but they cannot leave it empty. I am also assuming that the cell are not empty before hand.
Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo Whoa
Application.EnableEvents = False
If Not Intersect(Target, Range("E4")) Is Nothing Then
If Len(Trim(Range("E4").Value)) = 0 Then Application.Undo
ElseIf Not Intersect(Target, Range("E6")) Is Nothing Then
If Len(Trim(Range("E6").Value)) = 0 Then Application.Undo
End If
LetsContinue:
Application.EnableEvents = True
Exit Sub
Whoa:
MsgBox Err.Description
Resume LetsContinue
End Sub
FOLLOWUP
Thanks that is what i want to do. What about the other ranges? Is it just a case of loads of IF THEN or can we use a CASE and loop through? – AdRock 2 mins ago
Add/Delete cell addresses from below as applicable.
Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo Whoa
Application.EnableEvents = False
If Not Intersect(Target, Range("E4,E6,E8:E9,E11:E14,L10:L14,L16,L23:L27,L29,L30:L33")) Is Nothing Then
If Len(Trim(Target.Value)) = 0 Then Application.Undo
End If
LetsContinue:
Application.EnableEvents = True
Exit Sub
Whoa:
MsgBox Err.Description
Resume LetsContinue
End Sub

Answer 2

You are partly right but Worksheet_Change() is triggered after the change, so after the deletion.
What I'd do is to have a hidden sheet to store the values entered by the user and then you can check in Worksheet_Change() whether the new value is empty (deleted) or not.
Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Address = "$E$4" Then
' check the previous value on the hidden sheet here, if changed, then save it, if empty, then restore it
End If
End Sub