protected void ViewPayment() { SqlConnection conn = new SqlConnection ("Server=DESKTOP-41H50KG\\SQLEXPRESS; Database=clubone; Uid=20201113; password=123456"); conn.Open(); SqlCommand cmd = new SqlCommand("select pID as pID, amount as amount from Payment where Payment.userID = @UID", conn); cmd.Parameters.Add("@UID", System.Data.SqlDbType.Int, 100).Value = Session["user_id"]; SqlDataAdapter adapter = new SqlDataAdapter(cmd); DataTable dt_payment = new DataTable(); adapter.Fill(dt_payment); PaymentList.DataSource = dt_payment; PaymentList.DataBind(); for (int i = 0; i < PaymentList.Rows.Count; ++i) { LinkButton btn = (LinkButton)PaymentList.Rows[i].FindControl("details"); int pID = Convert.ToInt32(PaymentList.Rows[i].Cells[0].Text); btn.PostBackUrl = "Receipt.aspx?id=" + pID; } }