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Specify length of characters to be entered for password and username

Posted on 2002-03-18
8
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Last Modified: 2006-11-17
I have the following code on generating log in for users,but this code doesn't specify the length for username and password,i want the code to tell the user the length required if the user types more characters than wanted for the username and password.



-----------------------------Code-------------------------
Private Sub Login_Click()
Dim found As Boolean
On Error GoTo ErrHandler

found = False


If (Username <> "") And (Password <> "") Then
Set db = OpenDatabase("Z:\Project\FinalProject(ExpensesMonitoringSystem).mdb")
Set rs = db.OpenRecordset("Log In")

Do While (rs!Password <> "") And (Not found)
If (rs!Username = Username.Text) And (rs!Password = Password.Text) Then
found = True
Else
rs.MoveNext
End If
Loop

End If
If found Then

Login.Visible = False
Load ExpensesMain
ExpensesMain.Show
'Else

End If
Set rs = Nothing

Exit Sub

ErrHandler:
If Err = 3021 Then
MsgBox "Incorrect Username or Password,Try one's the system recognises..." & "Consult system administrator if having problem logging on...", vbExclamation
'vbOKCancel, 0 + 48, "Login"
'MsgBox "Consult you system administrator if having problem logging on...", vbExclamation
'MsgBox "Try another name,one the system recognises...", vbExclamation
Else
Exit Sub
End If
End Sub


0
Comment
Question by:humbk2002
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8 Comments
 
LVL 18

Accepted Solution

by:
deighton earned 10 total points
ID: 6876377
use the MaxLength property of the textbox
0
 
LVL 22

Expert Comment

by:Mohammed Nasman
ID: 6876438
use Len function

 if Len(Password) > 8 then
   msgbox "your password can't be more than 8 letters"
 end if

0
 
LVL 4

Expert Comment

by:WolfgangKoenig
ID: 6876442
and when you need the max. size of a passwd or username use
this:
Dim MaxCharofUsername
Dim MaxCharofPassword
...
Set db = OpenDatabase("Z:\Project\FinalProject(ExpensesMonitoringSystem).mdb")
Set rs = db.OpenRecordset("Log In")
MaxCharofUsername = rs!Username.DefinedSize
MaxCharofPassword = rs!Password.DefinedSize


WoK;)
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LVL 4

Expert Comment

by:WolfgangKoenig
ID: 6876458
Sorry, perhaps you must access the fields in this semantic:
MaxCharofUsername = rs.Fields("Username").DefinedSize
MaxCharofPassword = rs.Fields("Password").DefinedSize
Form1.UsernameTextEdit.MaxLength  = MaxCharofUsername
Form1.PasswdTextEdit.MaxLength  = MaxCharofPassword
(like deighton says)

Beside:
No need of Len() because of the functions:
CurrentCharofUsername = rs!Username.ActualSize
...
0
 
LVL 45

Expert Comment

by:aikimark
ID: 6877211
The best user interface is:
* Use MaxLength property to limit characters typed by user
* Add labels with text instructing user on allowed sizes of userid and password
* In the Change() event of both the UserID and PWD textboxes, add the following code.  
Note1: You can code in one procedure if the two textbox controls were members of a control array.  

My example.
Private Sub txtUIDPWD_Change(Index As Integer)
  If Len(txtUIDPWD(Index).Text) >= intMinAllowedLength Then
    cmdGenerateLogin.Enabled = True
  Else
    cmdGenerateLogin.Enabled = False
  End If
End Sub

Note2: You might also check for illegal characters before enabling the cmdGenerateLogin button.

=============================================
* Add code in the KeyPress events of the textbox controls to prevent illegal characters from entering.
0
 
LVL 1

Expert Comment

by:Moondancer
ID: 7017040
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Expert Comment

by:DanRollins
ID: 7634124
Hi humbk2002,
It appears that you have forgotten this question. I will ask Community Support to close it unless you finalize it within 7 days. I will ask a Community Support Moderator to:

    Split points between: deighton and mnasman

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Expert Comment

by:kodiakbear
ID: 7665951
Moving to the paq

kb
Experts Exchange Moderator
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