protected void gvCarrito_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{
Session["Det"] = gvCarrito.Rows[e.NewSelectedIndex].Cells[1].Text.ToString();
Session["prodId"] = objDatos.ObtDetCveP(Application["cnn"].ToString(), int.Parse(Session["Det"].ToString()));
Response.Write("<script language='javascript'>alert('Agregue su nueva cantidad deseada');document.location.href='dflDescProdA.aspx'</script>");
}