MS Access with ADO.NET in VB.NET

Hi,

I am trying to write a simple login screen where the code takes the name entered by the user and password in  a textbox and does an sql query to see if the database has it. I am using Access. The funny thing is that when I say select * from Login, it works with out an error. The error is An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in system.data.dll

Please Help, I am stumped.
Thanks


I have a Connection class.

The Connection code is :

Option Explicit On
'Option Strict
Imports System
Imports System.Data
Imports System.Data.OleDb
Namespace DBConnection
    Public Class DBConnect

        Dim ConnectString As String = "Provider=Microsoft.Jet.OleDb.4.0;" & _
                                                   "data source=C:\OmniTest\Test.mdb;"
        Dim myConnection As New OleDbConnection(ConnectString)
        Dim objCmd As OleDbCommand
        Dim objReader As OleDbDataReader
        Dim ds As DataSet

        Public Sub New()
            myConnection.Open()
        End Sub

        Public Function getDataSet(ByVal SqlSelect As String) As DataSet

            Dim myDataAdapter As New OleDbDataAdapter(SqlSelect, myConnection)
            Dim myDataSet As New DataSet()
            myDataAdapter.Fill(myDataSet)
            ds = myDataSet
            Return myDataSet
        End Function

        Public Function getDataReader(ByVal SqlSelect As String) As OleDbDataReader
            objCmd = New OleDbCommand(SqlSelect, myConnection)
            Return objCmd.ExecuteReader()
        End Function

        Public Function doUpdate(ByVal SqlManipulate As String) As Integer
            objCmd = New OleDbCommand(SqlManipulate, myConnection)
            Return objCmd.ExecuteNonQuery()
        End Function

        Public Function getRow(ByVal ds As DataSet, ByVal row As Integer) As DataRow
            Dim objTable As DataTable = ds.Tables(0)
            Return objTable.Rows(row)
        End Function

        Public Function getField(ByVal FieldName As String, ByVal I As Integer) As VariantType
            Dim objRow As DataRow
            Dim objTable As DataTable = ds.Tables(0)
            objRow = objTable.Rows(I)
            Return objRow(FieldName)
        End Function

        Protected Overrides Sub Finalize()
            myConnection.Close()
        End Sub

    End Class

End Namespace


The code on my button click is:

         Dim name As String = txtUser.Text
        MsgBox(name)
        Dim pwd As String = txtPwd.Text
        MsgBox(pwd)
        SQLString1 = "SELECT Username, Password FROM Login WHERE Username=" + name
         objDBConnect.getDataSet(SQLString1)

I even tried:

Dim strConnection As String = "Provider=Microsoft.Jet.OleDb.4.0;" & _
                                   "data source=C:\OmniTest\Test.mdb;"
        Dim objConnection As New OleDbConnection(strConnection)
        objConnection.Open()
        MsgBox("Open")

        Dim strSQL As String = "SELECT Username, Password FROM Login WHERE Username = " + name
        Dim objAdapter As New OleDbDataAdapter(strSQL, objConnection)
        Dim objDataSet As New DataSet()
        objAdapter.Fill(objDataSet, "Login")
        Dim Login As DataTable = objDataSet.Tables("Login")
       

        objConnection.Close()

PhillyZooAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Éric MoreauSenior .Net ConsultantCommented:
You need to surround the content of the variable with queotes:

Dim strSQL As String = "SELECT Username, Password FROM Login WHERE Username = '" + name + "'"
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Éric MoreauSenior .Net ConsultantCommented:
will you close that one too?
0
PhillyZooAuthor Commented:
Yes, thanks
0
PhillyZooAuthor Commented:
I knew it was something small that I was forgeting. For some reason I thought that only numbers needed the quotes around the parameter.

Have a Good Day
0
Éric MoreauSenior .Net ConsultantCommented:
>>For some reason I thought that only numbers needed the quotes around the parameter.

Numbers do not need to quotes. Strings need quotes. Dates needs #.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Programming

From novice to tech pro — start learning today.