/// <summary>
    /// Bind grid
    /// </summary>
    public void Bind()
    {
        AccountService accountService = new AccountService();
        AccountQuery filters = new AccountQuery();

        //check Login id
        if (UserID.Text.Trim().Length > 0)
        {
            MembershipUser user = Membership.GetUser(UserID.Text.Trim());

            if (user != null)
            {
                filters.AppendEquals(AccountColumn.UserID, user.ProviderUserKey.ToString());
            }
            else
            {
                filters.AppendEquals(AccountColumn.UserID, UserID.Text.Trim());
            }
        }

        //check OrderID
        if (OrderID.Text.Trim().Length > 0)
        {
            int orderID = int.Parse(OrderID.Text.Trim());

            OrderService _orderService = new OrderService();
            Order entity = _orderService.GetByOrderID(orderID);

            if (entity != null)
            {
                filters.AppendEquals(AccountColumn.AccountID, entity.AccountID.Value.ToString());
            }
            else
            {
                filters.AppendEquals(AccountColumn.AccountID, "0");
            }
        }

        //Filter query
        filters.Append(AccountColumn.BillingFirstName,"%" + FirstName.Text.Trim() + "%");
        filters.Append(AccountColumn.BillingLastName, "%" + LastName.Text.Trim() + "%");
        filters.Append(AccountColumn.BillingPostalCode, "%" + ZipCode.Text.Trim() + "%");
        filters.Append(AccountColumn.BillingCompanyName, "%" + CompanyName.Text.Trim() + "%");

        //get account list
        TList<Account> accountList = accountService.Find(filters.GetParameters());

        if (accountList != null)
        {
            if (accountList.Count == 0)
            {
                lblSearhError.Text = "No users found.";
            }
        }
        else
        {
            lblSearhError.Text = "No users found.";
        }

        //Bind account list grid
        ui_FoundUsers.DataSource = accountList;
        ui_FoundUsers.DataBind();
    }