protected void Page_Load(object sender, EventArgs e)
{
if (!checkCookie())
Response.Redirect("Login.aspx");
String sellerUsername = Request.Cookies["Car-Trading"]["Username"].ToString();
DataSet ds = new DataSet();
DatabaseHandler obj=new DatabaseHandler();
ds = obj.GetSellerId(sellerUsername);
String sellerId = ds.Tables[0].Rows[0]["SELLER_ID"].ToString();
ds = obj.GetSellerCarStock(sellerId);
GridView1.DataSource = ds;
GridView1.DataBind();
}