I want to save data on a database but i dnt want the data to be saved if the Username and Password already exist

Question

1.00/5 (1 vote)

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VB

Button for saving

VB

Dim objsmem As New BussinesLog.Login
        If TxtPosmem.Text = "Application_Admin" Then

            If TxtUser_mem.Text = objsmem.User_nameM And TxtPassmem.Text = objsmem.Passwords Then
                LitMessage.Text = ("This User_name or password already exists")

            ElseIf TxtUser_mem.Text <> objsmem.User_nameM And TxtPassmem.Text <> objsmem.Passwords Then
                objsmem.User_nameM = TxtUser_mem.Text
                objsmem.Function_id = 1
                objsmem.Passwords = TxtPassmem.Text
                objsmem.Question = DropDownList2.SelectedValue
                objsmem.Answer = TxtAnsmem.Text
                objsmem.Position = TxtPosmem.Text
                objsmem.Save_Mem_Account()
                MsgBox("Hope it works", MsgBoxStyle.Information, "SAVING>>>>>")
            End If

        End If

Posted 31-Aug-11 4:20am

P.C Shabangu

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#realJSOP · Answer 1 · 2011-08-31T04:33:00

Solution 1

Let the stored procedure handle it and return a value indicating that it's a duplicate userID (if it is). It really shouldn't matter if the password exists or not - just the user ID.

Posted 31-Aug-11 4:33am

#realJSOP

Comments

RaisKazi 31-Aug-11 10:37am

Yes 5!. It's really doesn't logical to check Password exists or Not.
Only check on UserName should be enough.

Reiss 31-Aug-11 11:10am

Agreed that the database should handle this - if this is the requirement then the userID column should have a unique constraint on it in the database, that way you can just try and insert the record and handle the error if it exists - this has the advantage of getting past any race conditions