Clear the contents of columns B to F if cell A is empty - excel

Question

I have a worksheet with values depending on Cell A. If a row in column A contains a value then cells from Columns B through H will be changed accordingly.
If Cell of Column A is empty I want to reset the cells from columns D through F.
I wrote down the following VBA Code
Private Sub Worksheet_Change(ByVal Target As Range)
Dim n As Integer
For n = 5 To 75
Application.EnableEvents = False
If VarType(Cells(n, 1)) = vbEmpty Then
Cells(n, 4).ClearContents
Cells(n, 5).ClearContents
Cells(n, 6).ClearContents
Application.EnableEvents = True
End If
Next n
End Sub
The "FOR" Loop is annoying, and making the Excel to pause for 1 second or more after any entry to any Cell, can anyone help me correct the above code to do what I need to do without the "FOR" loop.

Answer 1

You are using a Worksheet_Change event and you iterating through 70 rows each time something changes.. this is a bad approach for this kind of problem and that's why there is a delay.
Instead, try
Private Sub Worksheet_Change(ByVal Target As Range)
Dim n As Long
If Target.Column = 1 Then
If IsEmpty(Cells(Target.Row, 1)) Then
Range("B" & Target.Row & ":F" & Target.Row).ClearContents
End If
End If
End Sub
this will only clear the cells if you remove a value from column A => when cell in column A is empty

Answer 2

Try this:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim i As Integer
If Mid(Target.Address(1, 1), 1, 2) = "$A" Then
If Target.Cells(1, 1).Value = "" Then
For i = 4 To 6
Target.Cells(1, i).Value = ""
Next i
End If
End If
End Sub

Answer 3

Give this a try:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rLook As Range, r As Range, Intr As Range
Set rLook = Range("A5:A75")
Set Intr = Intersect(rLook, Target)
If Intr Is Nothing Then Exit Sub
Application.EnableEvents = False
For Each r In Intr
If r.Value = "" Then
rw = r.Row
Range("D" & rw & ":F" & rw).ClearContents
End If
Next r
Application.EnableEvents = True
End Sub
It should have minimal impact on timing.

Answer 4

Use a range object.
The following line of code will print the address of the Range we'll use to clear the contents. The first cells call gets the upper left corner of the range, the second cells call gets the lower right corner of the range.
Private Sub test()
Debug.Print Range(Cells(5, 4), Cells(75, 6)).Address
End Sub
We apply this to your code like this:
Private Sub Worksheet_Change(ByVal Target As Range)
If VarType(Cells(Target.Row, 1)) = vbEmpty Then
Application.EnableEvents = False
Range(Cells(Target.Row, 4), Cells(Target.Row, 6)).ClearContents
Application.EnableEvents = True
End If
End Sub
One final sidenote: You should use an error handler to make sure events are always enabled when the sub exits, even if an error occurs.
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo ErrHandler
If VarType(Cells(Target.Row, 1)) = vbEmpty Then
Application.EnableEvents = False
Range(Cells(Target.Row, 4), Cells(Target.Row, 6)).ClearContents
End If
ExitSub:
Application.EnableEvents = True
Exit Sub
ErrHandler:
MsgBox "Oh Noes!", vbCritical
Resume ExitSub
End Sub

Answer 5

You should disable events and cater for multiple cells when using the Change event.
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rng1 As Range
Dim rng2 As Range
Set rng1 = Intersect(Columns("A"), Target)
If rng1 Is Nothing Then Exit Sub
With Application
.EnableEvents = False
.ScreenUpdating = False
End With
For Each rng2 In rng1.Cells
If IsEmpty(rng2.Value) Then rng2.Offset(0, 1).Resize(1, 5).ClearContents
Next
With Application
.EnableEvents = True
.ScreenUpdating = True
End With
End Sub

Answer 6

For those that need to have data entered in one cell cleared (in a column) when there's a change in another column use this, which is a modification of Gary's Student.
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rLook As Range, r As Range, Intr As Range
Set rLook = Range("D:D")
Set Intr = Intersect(rLook, Target)
If Intr Is Nothing Then Exit Sub
Application.EnableEvents = False
For Each r In Intr
If r.Value = "" Then
rw = r.Row
Range("L:L").ClearContents
End If
Next r
Application.EnableEvents = True
End Sub