protected void buy_Click(object sender, EventArgs e)
 {
     Button buyclick = ((Button)sender);
     String id = buyclick.Attributes["data-id"];
     if (!String.IsNullOrEmpty(id))
     {
         Cart obj = new Cart();
         obj.addSItemToCart(id);
     }
     Response.Redirect("MyCart.aspx");
 }
 protected void Addtocart_Click(object sender, EventArgs e)
 {
     Button addtocartbutton = ((Button)sender);
     String id = addtocartbutton.Attributes["data-id"];
     if (!String.IsNullOrEmpty(id))
     {
         Cart obj = new Cart();
         obj.addSItemToCart(id);
     }
     String sb = @"<script>alert('Item Added to Cart');</script>";
     ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "script", sb, false);
 }