taxcalculator.cs

一个网上购物系统

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// The tax calculator uses the TaxProvider to calculate the tax amount on 
/// a set amount. You should consult your local tax laws before using/implementing.
/// </summary>
public class TaxCalculator {

    /// <summary>
    /// Determine tax by state
    /// </summary>
    /// <param name="state"></param>
    /// <param name="subtotal"></param>
    /// <returns></returns>
    public static double GetTaxByState(string state, double subtotal) {
        return Commerce.Providers.TaxProvider.Instance.CalculateTaxAmount(state, subtotal);
    }
    /// <summary>
    /// Determine tax by zip code.
    /// </summary>
    /// <param name="zip"></param>
    /// <param name="subtotal"></param>
    /// <returns></returns>
    public static double GetTaxByZip(string zip, double subtotal) {
        return Commerce.Providers.TaxProvider.Instance.CalculateTaxAmount("", zip, subtotal);

    }
}