Simple SQL Data Access Question

Hi,
I am developing an ASP.NET app that uses SQL Server 2005.
I have 1 single connection string to the database that is defined in my web.config.
In my backend VB code in the App_Data folder ( and so not related to any aspx page ) , i wish to access my database.

Here is the code I use:
        Dim query As New SqlDataSource
        query.ConnectionString = ConfigurationManager.ConnectionStrings("MainConnectionString").ConnectionString
        query.InsertCommand = "INSERT INTO myTable(data, time) VALUES (...)
        query.Insert()
All i want to is whether this is the correct and fastest way to access my database. Is it ??

Thanks for your help,
roxie