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   源码介绍

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/*
 * Created By Shemeer NS 
 * This Code is created for demo purpose and uploaded in Codeproject
 * My Other Articles in codeproject - http://www.codeproject.com/script/Articles/MemberArticles.aspx?amid=3175840
 * */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

using System.Net;
using System.Text.RegularExpressions;
using System.Web.Script.Services;
namespace CurrencyConverter
{
    /// <summary>
    /// Summary description for WebService
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    [ScriptService]
    public class WebService : System.Web.Services.WebService
    {
        [WebMethod]
        public decimal ConvertGOOG(decimal amount, string fromCurrency, string toCurrency)
        {
            WebClient web = new WebClient();
            string url = string.Format("http://www.google.com/ig/calculator?hl=en&q={2}{0}%3D%3F{1}", fromCurrency.ToUpper(), toCurrency.ToUpper(), amount);
            string response = web.DownloadString(url);
            Regex regex = new Regex("rhs: \\\"(\\d*.\\d*)");
            decimal rate = System.Convert.ToDecimal(regex.Match(response).Groups[1].Value);
            return rate;
        }
    }
}