Design question

Posted on 2000-04-01
Last Modified: 2010-05-02
Hello. I need to design an app that will allow different users access to different objects. Upon users Login program should know what he / she can access. Certain users will be able to modify data others will just be able to view it. How can i allow this ? Data is stored in Access. Please suggest . Thank  you.
Question by:vbRetard

Accepted Solution

Foyal earned 15 total points
ID: 2676121
Add a table for the users with an access code field, then when your program runs verify each process according to this access code.


Option Explicit

Dim intUserCode As Integer

Private Sub Form_Load()
    frmLogin.Show vbModal, Me

    'load the user code from the
    'database based on the user name
    intUserCode = GetUserCode(UserName)

End Sub    

Private Function GetUserCode(S As String) As Integer
    'your code to get the code...

End Function

Private Sub cmdAdd_Click()
    'if the user isn't qualified then
    'show a message and exit the sub
    If intUserCode < FULL_ACCESS Then
        MsgBox "Access Denied"
        Exit Sub
    End If
    'otherwise, do whatever you
    'need to do...

End Sub


Expert Comment

ID: 2676273
Below is brief description of a good design and Microsoft recommendation ...

Your application is 3-tier should be  
3 tier application.  

1. Presentation VB code;
2. Business Logic components
3. Data Components - access DB

Use MTS as components placeholder, so
BL components and Data Components put
in MTS. Use MTS role base security to
restrict access to Data Components specific users or users groups.

Author Comment

ID: 2676713
MTS is a bit too advanced for me right now. I need something simpler. To create a class object which can do something like this. I don't need anyone post the code just ideas on how i can validate or lock different portions of the program to the person who shouldn't have access to it.

Expert Comment

ID: 2677280
Foyal's suggestion is a good one.

Expert Comment

ID: 2716794
Thanks for the point.

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