private string GetWeek(int dayOfWeek)

        {

            string returnWeek = "";

            switch (dayOfWeek)

            {

                case 1:

                    returnWeek = "星期一";

                    break;

                case 2:

                    returnWeek = "星期二";

                    break;

                case 3:

                    returnWeek = "星期三";

                    break;

                case 4:

                    returnWeek = "星期四";

                    break;

                case 5:

                    returnWeek = "星期五";

                    break;

                case 6:

                    returnWeek = "星期六";

                    break;

                case 0:

                    returnWeek = "星期日";

                    break;

            }

            return returnWeek;

        }

private string GetChineseDateTime(DateTime datetime)

        {

            ChineseLunisolarCalendar ChinaData = new ChineseLunisolarCalendar();

            int lyear = ChinaData.GetYear(datetime);

            int lmonth = ChinaData.GetMonth(datetime);

            int lday = ChinaData.GetDayOfMonth(datetime);

            //获取闰月， 0 则表示没有闰月

            int leapMonth = ChinaData.GetLeapMonth(lyear);

            bool isleap = false;

            if (leapMonth > 0)

            {

                if (leapMonth == lmonth)

                {

                    //闰月

                    isleap = true;

                    lmonth--;

                }

                else if (lmonth > leapMonth)

                {

                    lmonth--;

                }

            }

            //十天干

            string[] tiangan = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };

            //十二地支

            string[] dizhi = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };

            //十二生肖

            string[] shengxiao = { "鼠", "牛", "虎", "免", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };

            string ChinaYear = "";

            if (lyear > 3)

            {

                int tgIndex = (lyear - 4) % 10;

                int dzIndex = (lyear - 4) % 12;

                ChinaYear = string.Concat(tiangan[tgIndex], dizhi[dzIndex], "[", shengxiao[dzIndex], "]");

            }

            string[] months = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二(腊)" };

            string ChinaMonth = "";

            if (lmonth < 13 && lmonth > 0)

            {

                ChinaMonth = months[lmonth - 1];

            }

            string[] days1 = { "初", "十", "廿", "三" };

            string[] days = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };

            string ChinaDay = "";

            if (lday > 0 && lday < 32)

            {

                if (lday != 20 && lday != 30)

                {

                    ChinaDay = string.Concat(days1[(lday - 1) / 10], days[(lday - 1) % 10]);

                }

                else

                {

                    ChinaDay = string.Concat(days[(lday - 1) / 10], days1[1]);

                }

            }

            return string.Concat(ChinaYear, "年", isleap ? "闰" : string.Empty, "\r\n农历 ", ChinaMonth, "月", ChinaDay);

            //return "农历 " + ChinaMonth + "月" + ChinaDay;

        }