Can Anyone help me with this problem. I have been trying to connect my vb.net project to a sql database for two weeks. Thanks

Option Explicit On

Imports System.data.sqlclient
Imports System.Data

Public Class frmMain

Inherits System.Windows.Forms.Form

Dim cn As New SqlConnection
Dim mycommand As New SqlCommand
Dim myDS As DataSet = New DataSet
Dim Mydatagrid As New DataGrid
Dim da As New SqlDataAdapter
Dim cmdtext As String = "select itemnumber from auto"


Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

cn.ConnectionString = "integrated security=true;initial catalog=justin"

'cn.Open() ****this gave me an error so I commented it out****

Dim cmdtext As String = "select * from [auto]"
Dim da As New SqlDataAdapter
da.SelectCommand = New SqlCommand(cmdtext, cn)

Dim dt As New DataTable("Table Auto")
da.Fill(dt)*****this is highlighted green and says:an unhandled exception of type "system.data.sqlclient.sqlexeption' occured in system.data.dll**********************


With cboItemNumber
.DataSource = dt
.DisplayMember = "ItemNumber"
End With