C#日期类型转化总结【转化，农历，节气，星期】转为日期类型将8位日期字符串转换为日期格式
dateStr = "20220203";System.IFormatProvider format=new System.Globalization.CultureInfo("zh-CN",true); string strDateFormat = "yyyyMMdd";//指定转换格式date = DateTime.ParseExact(dateStr,strDateFormat,format, DateTimeStyles.AllowWhiteSpaces);
将6位字符串转化为日期格式
dateStr = "202202";System.IFormatProvider format=new System.Globalization.CultureInfo("zh-CN",true); string strDateFormat = "yyyyMM";//指定转换格式 date = DateTime.ParseExact(dateStr,strDateFormat,format, DateTimeStyles.AllowWhiteSpaces); var str = "2022/02/03";var time = new DateTime();if (DateTime.TryParse(str, out time)){ Console.WriteLine($"转化成功{time}");}
采用拼接连接符的方式进行日期转换（不建议采用）
//分别获取20051126中的年、月、日字符串 string yyyy="20051126".Substring(0,4); string mm="20051126".Substring(4,2); string dd="20051126".Substring(5,2); //拼写符合日期格式的字符串 string riqi=yyyy+"-"+mm+"-"+dd; //将符合日期格式的字符串转化为DateTime数据类型 DateTime dt = Convert.ToDateTime(riqi);
使用字符串插入函数进行日期转换
// 把20051126变为2005/11/26DateTimeFormatInfo dtFormat = new System.GlobalizationDateTimeFormatInfo();dtFormat.ShortDatePattern = "yyyy/MM/dd";string s = "20051126"; s = s.Insert(4,"/"); s = s.Insert(7,"/");DateTime dt = Convert.ToDateTime(s, dtFormat);
获取星期几string[] Day = new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };var a = Day[Convert.ToInt16(DateTime.Now.DayOfWeek)];Console.WriteLine(a);
DateTime时间格式转换为Unix时间戳格式System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));long t = (time.Ticks - startTime.Ticks) / 10000; //除10000调整为13位
优雅的获取农历ChineseLunisolarCalendar ChineseCalendar = new ChineseLunisolarCalendar();int year = ChineseCalendar.GetYear(DateTime.Now);int day = ChineseCalendar.GetDayOfMonth(DateTime.Now);int month = ChineseCalendar.GetMonth(DateTime.Now);int leapMonth = ChineseCalendar.GetLeapMonth(year);string date = string.Format("农历{0}{1}（{2}）年{3}{4}月{5}{6}", "甲乙丙丁戊己庚辛壬癸"[(year - 4) % 10], "子丑寅卯辰巳午未申酉戌亥"[(year - 4) % 12], "鼠牛虎兔龙蛇马羊猴鸡狗猪"[(year - 4) % 12], month == leapMonth ? "闰" : "", "无正二三四五六七八九十冬腊"[leapMonth > 0 && leapMonth <= month ? month - 1 : month], "初十廿三"[day / 10], "十一二三四五六七八九"[day % 10]); Console.WriteLine($"当前时间：{DateTime.Now},农历是："+date);//输出：当前时间：2022/10/18 18:27:00,农历是：农历壬寅（虎）年九月廿三
获取二十四节气//输入new DateTime(2022,10,23) 输出 霜降//输入new DateTime(2022,10,8) 输出 寒露//输入new DateTime(2022,10,18) 输出 “” 【暂无节气】public static string ChineseTwentyFourDay(DateTime date1){ string[] SolarTerm = new string[] { "小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至" }; int[] sTermInfo = new int[] { 0, 21208, 42467, 63836, 85337, 107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989, 308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758 }; DateTime baseDateAndTime = new DateTime(1900, 1, 6, 2, 5, 0); //#1/6/1900 2:05:00 AM# DateTime newDate; double num; int y; string tempStr = ""; y = date1.Year; for (int i = 1; i <= 24; i++) { num = 525948.76 * (y - 1900) + sTermInfo[i - 1]; newDate = baseDateAndTime.AddMinutes(num);//按分钟计算 if (newDate.DayOfYear == date1.DayOfYear) { tempStr = SolarTerm[i - 1]; break; } } public static string ChineseTwentyFourDay(DateTime date1) { string[] SolarTerm = new string[] { "小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至" }; int[] sTermInfo = new int[] { 0, 21208, 42467, 63836, 85337, 107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989, 308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758 }; DateTime baseDateAndTime = new DateTime(1900, 1, 6, 2, 5, 0); //#1/6/1900 2:05:00 AM# DateTime newDate; double num; int y; string tempStr = ""; y = date1.Year; for (int i = 1; i <= 24; i++) { num = 525948.76 * (y - 1900) + sTermInfo[i - 1]; newDate = baseDateAndTime.AddMinutes(num);//按分钟计算 if (newDate.DayOfYear == date1.DayOfYear) { tempStr = SolarTerm[i - 1]; break; } } return tempStr; }return tempStr;}
转为字符串类型 //2021年4月24日 System.DateTime.Now.ToString("D"); //2021-4-24 System.DateTime.Now.ToString("d"); //2021年4月24日 16:30:15 System.DateTime.Now.ToString("F"); //2021年4月24日 16:30 System.DateTime.Now.ToString("f"); //2021-4-24 16:30:15 System.DateTime.Now.ToString("G"); //2021-4-24 16:30 System.DateTime.Now.ToString("g"); //16:30:15 System.DateTime.Now.ToString("T"); //16:30 System.DateTime.Now.ToString("t"); //2021年4月24日 8:30:15 System.DateTime.Now.ToString("U"); //2021-04-24 16:30:15Z System.DateTime.Now.ToString("u"); //4月24日 System.DateTime.Now.ToString("m"); System.DateTime.Now.ToString("M"); //Tue, 24 Apr 2021 16:30:15 GMT System.DateTime.Now.ToString("r"); System.DateTime.Now.ToString("R"); //2021年4月 System.DateTime.Now.ToString("y"); System.DateTime.Now.ToString("Y"); //2021-04-24T15:52:19.1562500+08:00 System.DateTime.Now.ToString("o"); System.DateTime.Now.ToString("O"); //2021-04-24T16:30:15 System.DateTime.Now.ToString("s"); //2021-04-24 15:52:19 System.DateTime.Now.ToString("yyyy-MM-dd HH：mm：ss：ffff"); //2021年04月24 15时56分48秒 System.DateTime.Now.ToString("yyyy年MM月dd HH时mm分ss秒"); //星期二, 四月 24 2021 System.DateTime.Now.ToString("dddd, MMMM dd yyyy"); //二, 四月 24 ’08 System.DateTime.Now.ToString("ddd, MMM d \"’\"yy"); //星期二, 四月 24 System.DateTime.Now.ToString("dddd, MMMM dd"); //4-08 System.DateTime.Now.ToString("M/yy"); //24-04-08 System.DateTime.Now.ToString("dd-MM-yy"); //今天 获取短时间类型 2022/10/18 0:00:00 DateTime.Now.Date.ToShortDateString(); //7天后 DateTime.Now.Date.ToShortDateString(); DateTime.Now.AddDays(7).ToShortDateString(); //7天前 DateTime.Now.AddDays(-7).ToShortDateString(); DateTime.Now.Date.ToShortDateString();
推荐阅读资料参考• C#编程学习48：将字符串转换为日期、比较日期及日期合法性验证 [1]
• C# 获取农历时间 [2]
• c# 算节气 [3]
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引用链接[1]
C#编程学习48：将字符串转换为日期、比较日期及日期合法性验证:
https://blog.csdn.net/m1m2m3mmm/article/details/123231352[2]
C# 获取农历时间:
https://blog.csdn.net/aq9527/article/details/80472643[3]
c# 算节气:
https://www.cnblogs.com/weloglog888/archive/2013/01/21/2869488.html
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