ต้องการดึงข้อมูลจาก MS SQL 3คอลั่ม มาแสดง ใน Drop drow list ทำยังไง

strcmd = "select ID+'  '+NAME+'  '+LASTNAME as newfield from users"
...
...
ddlcostcen.DataTextField = ("newfield")

    Sub ShowName()
        Dim objconn As SqlConnection
        Dim objcmd As SqlCommand
        Dim objReader As SqlDataReader
        Dim strconn As String
        Dim strcmd As String



        strconn = ConfigurationManager.AppSettings("ConnectionString")
        objconn = New SqlConnection(strconn)
        objconn.Open()


        strcmd = "select ID,NAME,LASTNAME from USERS"

        objcmd = New SqlCommand(strcmd, objconn)
        objReader = objcmd.ExecuteReader()

        While objReader.Read()
               ddlcostcen.Items.Add(New ListItem(String.Format("{0} {1} {2}", objReader("ID").ToString(), objReader("NAME").ToString(), objReader("LASTNAME").ToString()), objReader("ID").ToString()))
        End While

        objconn.Close()
    End Sub