无法从VB.net的字符串中删除字符

Question

I'm using Excel Interop with VB.net. My problem is using string.Remove. I am trying to remove the last 3 characters from cells that always contain strings with 11 characters.

I have written some code to change the value of the cells in a range.

    Dim lastrow5 As Integer

    lastrow5 = xlWsheet2.UsedRange.Rows.Count

    Dim myRange5, z As Excel.Range

    myRange5 = xlWsheet2.Range("E1:E" & lastrow5)

    For Each z In myRange5

        z.Value = z.Value.remove(8, 3)

    Next

But when I try to use Remove, I'm getting the error: Object Reference not set to an instance of an Object .

Can someone lead me in the right direction?

Answer 1

I think "the_lotus" is correct. Does this fix the error?

    Dim lastrow5 As Integer

    lastrow5 = xlWsheet2.UsedRange.Rows.Count

    Dim myRange5, z As Excel.Range

    myRange5 = xlWsheet2.Range("E1:E" & lastrow5)

    For Each z In myRange5

        If cell.Value Is Not Nothing Then z.Value = z.Value.remove(8, 3)

    Next

Edit: Ed's solution (with formatting) was:

Dim lastrow5 As Integer lastrow5 = xlWsheet2.UsedRange.Rows.Count 
Dim myRange5, z As Excel.Range myRange5 = xlWsheet2.Range("E1:E" & lastrow5) 
For Each z In myRange5 
        If (z.Value Is Nothing) Then 
        ElseIf z.Value.ToString = "null" Then 
        Else z.Value = z.Value.ToString.Remove(8, 3) 
        End If 
Next