Login form using access as database connection

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I designed as for in visual basic.net. This form a user must enter login detail i.e. username and password to open main form. users are created in access database. The challenge I received error message on login button in the form. and the message says "End
of statement expected" I attached the code

What I have tried:

Quote:
Try
'conn.Open()
'MsgBox("Susscess")

Dim sql As String = "SELECT * FROM tbl_user WHERE username='" & txtUsername.Text & "' AND password = '" & txtPassword.Text & "'"
Dim sqlCom As New System.Data.OleDb.OleDbCommand(sql)

'Open Database Connection
sqlCom.Connection = conn
conn.Open()

Posted 18-Jun-20 3:14am

NyikoB

Updated 18-Jun-20 3:37am

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Maciej Los · Accepted Answer · 2020-06-18T03:38:00

To resolve your issue, please read this: End of statement expected - Visual Basic | Microsoft Docs[^]
If it's a hole code, then you need to know that Try instruction should ends with End Try. See: Try...Catch...Finally statement - Visual Basic | Microsoft Docs[^]

There's few other things to improve...
1. Your code is sql injection vulnerable. See: SQL Injection - SQL Server | Microsoft Docs[^]
You have to use parameters!

2. You shouldn't store password as a plain-string. Please, read this: Password Storage: How to do it.[^]

3. You have to use Using Statement - Visual Basic | Microsoft Docs[^] to manage disposable resources (objects).

So...

VB.NET

Dim ConnString As String = "..."
Dim dt As DataTable = New DataTable()
Dim sCommand As String = "SELECT * FROM Table1 WHERE SomeField=?;"
Using conn As New OleDbConnection(connString)
    conn.Open()
    Using cmd As New OleDbCommand(sCommand, conn)
        cmd.Parameters.AddWithValue("?", SomeValue)
        Using reader AS OleDbDataReader = cmd.ExecuteReader()
            dt.Load(reader)
        End Using
    End Using
End Using