Error when clearing multiple cells in Excel - excel

Question

I'm using Worksheet_Change to make a value (either 1 or 0) appear in the next cell (Bx) when a value is entered in a range of cells (A1:A10).
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Range("A1:A10")) Is Nothing Then
If Target.Value = 1 Then
Target.Offset(0, 1).Value = 1
Else:
Target.Offset(0, 1).Value = 0
End If
End If
End Sub
The problem occurs when I try to clear the cells in column A.
When I select the cells I want to clear and press "Delete" I get "Run-time error '13' - Type mismatch" on the line "IF Target.Value = 1".
I would also like the cells in the B column to be cleared if I clear cells in the A column. E.g. if I delete cell A2:A5, B2:B5 should be cleared.
From what I understand the problem is that when selecting multiple cells it returns an array as the Target, and this is a mismatch with the Integer.
Is there a way around this problem?

Answer 1

Try this. You need to cater for multiple cells in some way, for the reasons you mention, and add an extra clause to your If.
Private Sub Worksheet_Change(ByVal Target As Range)
Dim r As Range, r1 As Range
Set r = Intersect(Target, Range("A1:A10"))
If Not r Is Nothing Then
For Each r1 In r
If r1.Value = 1 Then
r1.Offset(0, 1).Value = 1
ElseIf r1.Value = vbNullString Then
r1.Offset(0, 1).Value = vbNullString
Else
r1.Offset(0, 1).Value = 0
End If
Next r1
End If
End Sub

Answer 2

In a first step we add the functionality that multiple cells are selected and changed:
Private Sub Worksheet_Change_Var1(ByVal Target As Range)
Dim targetCell As Range
'If Target.Range.count
If Not Intersect(Target, Range("A1:A10")) Is Nothing Then
If Target.Cells.Count > 1 Then
For Each targetCell In Target
If targetCell.Value = 1 Then
targetCell.Offset(0, 1).Value = 1
Else
targetCell.Offset(0, 1).Value = 0
End If
Next targetCell
Else
If Target.Value = 1 Then
Target.Offset(0, 1).Value = 1
Else
Target.Offset(0, 1).Value = 0
End If
End If
End If
End Sub
In the 2nd step we understand that also the "one cell" case can be handled in the same way and we add an if clause for the "cell(s) cleared" case:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim targetCell As Range
'If Target.Range.count
If Not Intersect(Target, Range("A1:A10")) Is Nothing Then
For Each targetCell In Target
If targetCell.Value = 1 Then
targetCell.Offset(0, 1).Value = 1
Else
targetCell.Offset(0, 1).Value = 0
End If
'if cell in col A is empty, then clear cell in col B
If targetCell.Value = "" Then targetCell.Offset(0, 1).ClearContents
Next targetCell
End If
End Sub