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"));
}
}