很多人可能用过如下的功能：

我向微信号发个字符，然后后台去解析字符，拆出其中的关键字，然后去数据库查询是否开启此项服务，如果服务开启，则返回给用户调用此服务的结果。

最近两天开始做的服务有，天气查询，日历，快递，火车，黄金。。。等六个服务做成接口，今天要分析的是这里面唯一没有调用外部API接口的服务。

首先，我们要写好一个计算农历的方法，：

#region 获取农历方法

        

        ///<summary>
        /// 实例化一个 ChineseLunisolarCalendar
        ///</summary>
        private static ChineseLunisolarCalendar ChineseCalendar = new ChineseLunisolarCalendar();

        ///<summary>
        /// 十天干
        ///</summary>
        private static string[] tg = { "甲","乙","丙","丁","戊","己","庚","辛","壬","癸" };

        ///<summary>
        /// 十二地支
        ///</summary>
        private static string[] dz = { "子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥" };

        ///<summary>
        /// 十二生肖
        ///</summary>
        private static string[] sx = { "鼠","牛","虎","免","龙","蛇","马","羊","猴","鸡","狗","猪" };

        ///<summary>
        /// 返回农历天干地支年
        ///</summary>
        ///<param name="year">农历年</param>
        ///<return s></return s>
        public static string GetLunisolarYear(int year)
        {
            if (year > 3)
            {
                int tgIndex = (year - 4) % 10;
                int dzIndex = (year - 4) % 12;

                return string.Concat(tg[tgIndex],dz[dzIndex],"[",sx[dzIndex],"]");
            }

            throw new ArgumentOutOfRangeException("无效的年份!");
        }

        ///<summary>
        /// 农历月
        ///</summary>

        ///<return s></return s>
        private static string[] months = { "正","二","三","四","五","六","七","八","九","十","十一","十二(腊)" };

        ///<summary>
        /// 农历日
        ///</summary>
        private static string[] days1 = { "初","廿","三" };
        ///<summary>
        /// 农历日
        ///</summary>
        private static string[] days = { "一","十" };


        ///<summary>
        /// 返回农历月
        ///</summary>
        ///<param name="month">月份</param>
        ///<return s></return s>
        public static string GetLunisolarMonth(int month)
        {
            if (month < 13 && month > 0)
            {
                return months[month - 1];
            }

            throw new ArgumentOutOfRangeException("无效的月份!");
        }

        ///<summary>
        /// 返回农历日
        ///</summary>
        ///<param name="day">天</param>
        ///<return s></return s>
        public static string GetLunisolarDay(int day)
        {
            if (day > 0 && day < 32)
            {
                if (day != 20 && day != 30)
                {
                    return string.Concat(days1[(day - 1) / 10],days[(day - 1) % 10]);
                }
                else
                {
                    return string.Concat(days[(day - 1) / 10],days1[1]);
                }
            }

            throw new ArgumentOutOfRangeException("无效的日!");
        }



        ///<summary>
        /// 根据公历获取农历日期
        ///</summary>
        ///<param name="datetime">公历日期</param>
        ///<return s></return s>
        public static string GetChineseDateTime(DateTime datetime)
        {
            int year = ChineseCalendar.GetYear(datetime);
            int month = ChineseCalendar.GetMonth(datetime);
            int day = ChineseCalendar.GetDayOfMonth(datetime);
            //获取闰月， 0 则表示没有闰月
            int leapMonth = ChineseCalendar.GetLeapMonth(year);

            bool isleap = false;

            if (leapMonth > 0)
            {
                if (leapMonth == month)
                {
                    //闰月
                    isleap = true;
                    month--;
                }
                else if (month > leapMonth)
                {
                    month--;
                }
            }

            return string.Concat(GetLunisolarYear(year),"年",isleap ? "闰" : string.Empty,GetLunisolarMonth(month),"月",GetLunisolarDay(day));
        }




        #endregion

接着，拼接好返回的字符：

  Console.Write(DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss") + "\r\n" + "农历为："+GetChineseDateTime(DateTime.Now));

为了测试外部调用的情况，我们可以这样，一个ajax过来，然后提交到handler里面，handler调用这些接口来测试下。

需要注意的是，

1，拼接好的字符串里面的换行符最好是HTML标签中的<br/>,不使用\n；

2，调用百度等大型开发平台的API接口的时候，对于返回的JSON，处理JSON转对象的时候，要注意JSON里面数组都要变成LIST，然后再调用自己构造的泛型方法去转换。

下面分享一些私人手藏的接口：

http://api.ajaxsns.com/

@L_502_1@

http://api.map.baidu.com/telematics/v3/weather?location=%E5%8C%97%E4%BA%AC&output=json&ak=这里填写自己的AK

http://www.twototwo.cn/train/QueryTrainScheduleByNumber.aspx

http://www.chepiao100.com/my/doc/checi.html

http://www.haoservice.com/apilist/

http://www.bejson.com/go.html?u=http://www.bejson.com/webInterface.html

网上也有很多付费的接口，另外，今天做黄金查询的时候，发现了个聚合数据也不错哟~