.................
using System.Data.SqlClient;

public partial class product_product : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindData();
        }
    } 

   public void BindData()
    {
            Conn conn = new Conn();
            SqlConnection con = conn.getConn();
            SqlDataAdapter sda = new SqlDataAdapter("select * from product", con);
            DataSet ds = new DataSet();
            sda.Fill(ds);　　　　　//填充数据集
            GridView1.DataSource = ds;
            GridView1.DataBind();
            conn.Close();
    }
................
}