Calling Data into the Grid through DataSet

The Code Behind of the Button Click Event

protected void btnCustomerID_Click(object sender, EventArgs e)

    {

Customer objCustomer=new Customer();

//gv=GridView

        gvCustomers.DataSource = objCustomer.Select();

        gvCustomers.DataBind();

    }

The DataSet Method in a Seperate Class

SqlConnection conn=new SqlConnection("server=sheeban\\sqlexpress;integrated security=SSPI;database=northwind");

    SqlCommand cmd = new SqlCommand("SELECT * FROM customers", conn);

    SqlDataAdapter da=new SqlDataAdapter(cmd);

    DataSet ds = new DataSet();

    da.Fill(ds);

    return  ds;