private void BindCustomerTradeAccount() { if (txtParentCustomerId.Value != string.Empty) { CustomerAccountBo customerAccountBo = new CustomerAccountBo(); DataTable dtTradeAccountNumbers = customerAccountBo.GetTradeAccountNumbersByCustomer(int.Parse(txtParentCustomerId.Value)); ddlTradeAccountNos.DataTextField = dtTradeAccountNumbers.Columns[1].ToString(); ddlTradeAccountNos.DataValueField = dtTradeAccountNumbers.Columns[0].ToString(); ddlTradeAccountNos.DataSource = dtTradeAccountNumbers; ddlTradeAccountNos.DataBind(); ddlTradeAccountNos.Items.Insert(0, new ListItem("select", "-1")); } }