How Do I Give Sessions To Cart Sessions Like:

protected void LoginUser_LoggedIn(object sender, EventArgs e)
        {
            MyShoppingCart cart = new MyShoppingCart();
            string shoppingCartId = cart.GetShoppingCartId();
            cart.MigrateCart(shoppingCartId, this.LoginUser.UserName);
            if (this.Session["LoginReferrer"] != null)
            {
                base.Response.Redirect(this.Session["LoginReferrer"].ToString());
            }
            this.Session["UserName"] = this.LoginUser.UserName;
        }

da = new SqlDataAdapter("select count(*) from Login where UserName='" + TextBox1.Text.ToString() + "' and Password='" + TextBox2.Text.ToString() + "' and status='Activate' ", AdminCommerceEntities);
                int n = Convert.ToInt32(da.SelectCommand.ExecuteScalar());
                if (n == 1)
                {
                    da = new SqlDataAdapter("select * from Login where UserName='" + TextBox1.Text.ToString() + "' and Password='" + TextBox2.Text.ToString() + "' ", AdminCommerceEntities);
                    ds = new DataSet();
                    da.Fill(ds, "Login");
                    if (ds.Tables["Login"].Rows.Count > 0 && ds.Tables.Count > 0)
                    {
                        Session["UserName"] = TextBox1.Text.Trim();
                        Session["UserID"] = ds.Tables["Login"].Rows[0][0].ToString();
                        AdminCommerceEntities.Close();
                        Response.Redirect("~/Default.aspx");
                    }
                    else
                    {
                        Label1.Text = "Invalid userid and password.";
                    }
                }