Adding worksheets on workbook_open - excel

Question

I have an existing worksheet "StudentSheet1" which I need to add as many times as a user needs.
For eg, if a user enters 3 in cell "A1", saves it and closes the workbook.
I want to have three sheets: "StudentSheet1" , "StudentSheet2" and "StudentSheet3" when the workbook is opened next time.
So I will have the Code in "Workbook_Open" event. I know how to insert new sheets, but cant insert this particular sheet "StudentSheet1" three times
Here is my code:
Private Sub Workbook_Open()
Application.ScreenUpdating = False
Dim ws As Worksheet
Set ws = ActiveWorkbook.Sheets.Add(Type:=xlWorksheet, After:=Worksheets(1))
Application.ScreenUpdating = True
End Sub

Answer 1

EDIT
Sorry I misread the question, try this:
Private Sub Workbook_Open()
Dim iLoop As Integer
Dim wbTemp As Workbook
If Not Sheet1.Range("A1").value > 0 Then Exit Sub
Application.ScreenUpdating = False
Set wbTemp = Workbooks.Open(Filename:="//Ndrive/Student/Student.xlsm")
wbTemp.Sheets("StudentSheet1").Copy After:=ThisWorkbook.Sheets(Sheets.Count)
wbTemp.Close
Set wbTemp = Nothing
With Sheet1.Range("A1")
For iLoop = 2 To .Value
Sheets("StudentSheet1").Copy After:=ThisWorkbook.Sheets(Sheets.Count)
ActiveSheet.Name = "StudentSheet" & iLoop
Next iLoop
.Value = 0
End With
Application.ScreenUpdating = True
End Sub
Why are you wanting to add sheets on the workbook open? If the user disables macros then no sheets will be added. As Tony mentioned, why not add the sheets when called by the user?
EDIT
As per #Sidd's comments, if you need to check if the sheet exists first use this function:
Function SheetExists(sName As String) As Boolean
On Error Resume Next
SheetExists = (Sheets(sName).Name = sName)
End Function

Answer 2

user793468, I would recommend a different approach. :)
wbTemp.Sheets("StudentSheet1").Copy After:=ThisWorkbook.Sheets(Sheets.Count)
is not reliable. Please see this link.
EDIT: The above code will fail if the workbook has defined names. Otherwise it is absolutely reliable. Thanks to Reafidy for catching that.
I just noticed OP's comment about the shared drive. Adding amended code to incorporate OP's request.
Tried and Tested
Option Explicit
Const FilePath As String = "//Ndrive/Student/Student.xlsm"
Private Sub Workbook_Open()
Dim wb1 As Workbook, wb2 As Workbook
Dim ws1 As Worksheet, ws2 As Worksheet
Dim TempName As String, NewName As String
Dim ShtNo As Long, i As Long
On Error GoTo Whoa
Application.ScreenUpdating = False
Set wb1 = ActiveWorkbook
Set ws1 = wb1.Sheets("Sheet1")
ShtNo = ws1.Range("A1")
If Not ShtNo > 0 Then Exit Sub
Set wb2 = Workbooks.Open(FilePath)
Set ws2 = wb2.Sheets("StudentSheet1")
For i = 1 To ShtNo
TempName = ActiveSheet.Name
NewName = "StudentSheet" & i
If Not SheetExists(NewName) Then
ws2.Copy After:=wb1.Sheets(Sheets.Count)
ActiveSheet.Name = NewName
End If
Next i
'~~> I leave this at your discretion.
ws1.Range("A1").ClearContents
LetsContinue:
Application.ScreenUpdating = True
On Error Resume Next
wb2.Close savechanges:=False
Set ws1 = Nothing
Set ws2 = Nothing
Set wb2 = Nothing
Set wb1 = Nothing
On Error GoTo 0
Exit Sub
Whoa:
MsgBox Err.Description
Resume LetsContinue
End Sub
'~~> Function to check if sheet exists
Function SheetExists(wst As String) As Boolean
Dim oSheet As Worksheet
On Error Resume Next
Set oSheet = Sheets(wst)
On Error GoTo 0
If Not oSheet Is Nothing Then SheetExists = True
End Function