{"id":60025,"date":"2026-01-14T21:17:21","date_gmt":"2026-01-14T13:17:21","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/60025.html"},"modified":"2026-01-14T21:17:21","modified_gmt":"2026-01-14T13:17:21","slug":"c%e5%9f%ba%e7%a1%80%e5%b7%a5%e5%85%b7%e6%a8%a1%e5%9d%97%ef%bc%9amath%e9%9d%99%e6%80%81%e7%b1%bb%e3%80%81%e6%97%a5%e6%9c%9f%e7%9b%b8%e5%85%b3%e5%8a%9f%e8%83%bd%e6%a2%b3%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/60025.html","title":{"rendered":"C#\u57fa\u7840\u5de5\u5177\u6a21\u5757\uff1aMath\u9759\u6001\u7c7b\u3001\u65e5\u671f\u76f8\u5173\u529f\u80fd\u68b3\u7406"},"content":{"rendered":"

Math\u7c7b\u63d0\u4f9b\u5e38\u7528\u6570\u5b66\u8fd0\u7b97\u65b9\u6cd5，\u5305\u62ec\u53d6\u6574（Floor\/Ceiling\/Round）\u3001\u7edd\u5bf9\u503c（Abs）\u3001\u6700\u5927\u6700\u5c0f\u503c（Max\/Min）\u3001\u5f00\u65b9（Sqrt）\u3001\u5e42\u8fd0\u7b97（Pow）\u3001\u4e09\u89d2\u51fd\u6570（Sin\/Cos\/Tan）\u548c\u5bf9\u6570\u8fd0\u7b97（Log\/Log10）\u3002DateTime\u7c7b\u7528\u4e8e\u65e5\u671f\u65f6\u95f4\u64cd\u4f5c，\u652f\u6301\u83b7\u53d6\u5f53\u524d\u65f6\u95f4（Now）\u3001\u683c\u5f0f\u5316\u8f93\u51fa（ToString）\u3001\u65f6\u95f4\u6233\u8f6c\u6362（ToUnixTimeSeconds）\u548c\u65f6\u95f4\u8ba1\u7b97（AddYears\u7b49）\u3002TimeSpan\u53ef\u7528\u4e8e\u8ba1\u7b97\u65f6\u95f4\u95f4\u9694，\u5305\u542bDays\u548cTotalSeconds\u7b49\u5c5e\u6027\u3002\u6587\u7ae0\u8fd8\u4ecb\u7ecd\u4e86\u6570\u503c\u7c7b\u578b\u7684\u6781\u9650\u503c（\u5982int.MaxValue）\u548c\u65e5\u671f\u89e3\u6790\u65b9\u6cd5\u3002<\/p>\n

Math\u9759\u6001\u7c7b<\/h2>\n

Math \u63d0\u4f9b\u4e00\u4e9b\u5173\u4e8e\u6570\u5b66\u8fd0\u7b97\u7684\u65b9\u6cd5<\/p>\n

Math.PI\u00a0\u5706\u5468\u7387<\/p>\n

Math.Floor(2.9);\u5411\u4e0b\u53d6\u6574<\/p>\n

Math.Ceiling(3.1); \u5411\u4e0a\u53d6\u6574<\/p>\n

Math.Round()\u00a0 \u6240\u8c13\u94f6\u884c\u5bb6\u820d\u5165\u6cd5，\u5176\u5b9e\u8d28\u662f\u4e00\u79cd\u56db\u820d\u516d\u5165\u4e94\u53d6\u5076(\u53c8\u79f0\u56db\u820d\u516d\u5165\u4e94\u7559\u53cc)\u6cd5\u3002\u5176\u89c4\u5219\u662f:\u5f53\u820d\u53bb\u4f4d\u7684\u6570\u503c\u5c0f\u4e8e5\u65f6，\u76f4\u63a5\u820d\u53bb\u8be5\u4f4d;\u5f53\u820d\u53bb\u4f4d\u7684\u6570\u503c\u5927\u4e8e\u7b49\u4e8e6\u65f6，\u5728\u820d\u53bb\u8be5\u4f4d\u7684\u540c\u65f6\u5411\u524d\u4f4d\u8fdb\u4e00;\u5f53\u820d\u53bb\u4f4d\u7684\u6570\u503c\u7b49\u4e8e5\u65f6，\u5982\u679c\u524d\u4f4d\u6570\u503c\u4e3a\u5947，\u5219\u5728\u820d\u53bb\u8be5\u4f4d\u7684\u540c\u65f6\u5411\u524d\u4f4d\u8fdb\u4e00，\u5982\u679c\u524d\u4f4d\u6570\u503c\u4e3a\u5076, \u5219\u76f4\u63a5\u820d\u53bb\u8be5\u4f4d\u3002<\/p>\n

Math.Abs(-1); \u00a0\u7edd\u5bf9\u503c<\/p>\n

Math.Max(\u53c2\u6570\u4e00,\u53c2\u6570\u4e8c);\u6c42\u4fe9\u4e2a\u6570\u7684 \u6700\u5927\u503c<\/p>\n

Math.Min(\u53c2\u6570\u4e00,\u53c2\u6570\u4e8c); \u6c42\u4fe9\u4e2a\u6570\u7684 \u6700\u5c0f\u503c<\/p>\n

Math.Sqrt(9);\u00a0 \u5f00\u65b9\u8fd0\u7b97 ，\u8fd4\u56de\u503c\u662f\u6307\u5b9a\u6570\u5b57\u7684\u5e73\u65b9\u6839<\/p>\n

Math.Pow(\u53c2\u6570\u4e00，\u53c2\u6570\u4e8c)); \u7528\u4e8e\u8ba1\u7b97\u7b2c\u4e00\u4e2a\u53c2\u6570（\u5e95\u6570）\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570（\u6307\u6570）\u6b21\u65b9，\u8fd4\u56de\u503c\u662fdouble \u7c7b\u578b<\/p>\n

Math.Sin()\u6b63\u5f26\u3001Math.Cos()\u4f59\u5f26\u3001Math.Tan ()\u6b63\u5207\u65b9\u6cd5\u4ec5\u63a5\u53d7\u5f27\u5ea6（Math.PI）\u4f5c\u4e3a\u53c2\u6570<\/p>\n

Math.Log10()\u00a0 \u8fd4\u56de\u6307\u5b9a\u6570\u5b57\u4ee510\u4e3a\u5e95\u7684\u5bf9\u6570\u662f\u591a\u5c11 \u4f8b\u5982Math.Log10(100); \u8fd4\u56de\u503c\u662f 2\u00a0 \u00a010\u7684\u591a\u5c11\u6b21\u65b9\u7b49\u4e8e100\u00a0<\/p>\n

Math.Log(10)\u8fd4\u56de\u6307\u5b9a\u6570\u5b57\u4ee5e\u4e3a\u5e95\u7684\u5bf9\u6570\u662f\u591a\u5c11<\/p>\n

Math.BigMul(,)\u8fd4\u56de\u4e24\u4e2a\u6570\u7684\u4e58\u79ef<\/p>\n

\u5173\u4e8e\u6570\u636e\u7c7b\u578b\u7684API\u548c\u5c5e\u6027<\/h3>\n

double.NegativeInfinity\u00a0 \u00a0\u8d1f\u65e0\u7a77\u5927（Negative\u6d88\u6781 ）<\/p>\n

double.PositiveInfinity\u00a0 \u6b63\u65e0\u7a77\u5927<\/p>\n

int.MaxValue\u00a0\u00a0int\u7c7b\u578b\u6700\u5927\u503c 2147483647 \u6574\u578b\u7684\u6700\u5927\u503c<\/p>\n

int.MinValue\u00a0 \u00a0 \u00a0int\u7c7b\u578b\u6700\u5c0f\u503c -2147483648 \u6574\u578b\u7684\u6700\u5c0f\u503c
\ndecimal.MaxValue\u00a0 \u00a0 \u5341\u8fdb\u5236\u6570\u6700\u5927\u503c\u00a0
\nsbyte.MaxValue\u00a0 \u00a0 \u00a0 \u6709\u7b26\u53f7\u5b57\u8282\u7c7b\u578b\u6700\u5927\u503c\u00a0127<\/p>\n<\/p>\n

\u65e5\u671f\u5bf9\u8c61<\/h2>\n

DateTime \u65e5\u671f\u7684\u7c7b，\u63d0\u4f9b\u4e00\u4e9b\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u3001\u65f6\u95f4\u683c\u5f0f\u5316\u3001\u8ba1\u7b97\u65f6\u95f4\u6233\u7b49\u529f\u80fd<\/p>\n

DateTime time = DateTime.Now; \u83b7\u53d6\u5f53\u524d\u8fd0\u884c\u4ee3\u7801\u7684\u8ba1\u7b97\u673a（\u672c\u5730\u673a\u5668）\u7684\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4（\u5305\u542b\u5e74\u6708\u65e5\u65f6\u5206\u79d2\u6beb\u79d2），\u5e76\u5c06\u8fd9\u4e2a\u65f6\u95f4\u503c\u8d4b\u503c\u7ed9\u540d\u4e3a time \u7684 DateTime \u7c7b\u578b\u53d8\u91cf\u3002<\/p>\n

DateTime time = DateTime.Now;<\/p>\n

\/\/\u53ef\u4ee5\u65f6\u95f4\u5bf9\u8c61\u8f6c\u6210\u5b57\u7b26\u4e32\u8fdb\u884c\u6253\u5370
\n Console.WriteLine(time.ToString());\/\/2025\/12\/5 14:06:52
\n Console.WriteLine(time.Year); \/\/ \u83b7\u53d6\u5f53\u524d\u5e74
\n Console.WriteLine(time.Month);\/\/\u83b7\u53d6\u5f53\u524d\u6708
\n Console.WriteLine(time.Day); \/\/\u83b7\u53d6\u5f53\u524d\u65e5
\n Console.WriteLine(time.Hour);\/\/\u83b7\u53d6\u5f53\u524d\u5c0f\u65f6
\n Console.WriteLine(time.Minute);\/\/\u83b7\u53d6\u5f53\u524d\u5206\u949f
\n Console.WriteLine(time.Second);\/\/\u83b7\u53d6\u5f53\u524d\u79d2
\n Console.WriteLine(time.Millisecond);\/\/\u83b7\u53d6\u5f53\u524d\u6beb\u79d2
\n Console.WriteLine(time.DayOfWeek); \/\/ \u5f53\u524d\u7684\u661f\u671f<\/p>\n

\/\/\u6839\u636e\u4e00\u4e9b\u7279\u6b8a\u7684\u7b26\u53f7\u83b7\u53d6\u5bf9\u5e94\u65f6\u95f4
\n Console.WriteLine(time.ToString("yy"));\/\/\u5e74\u7684\u540e\u4e24\u4f4d
\n Console.WriteLine(time.ToString("yyyy"));\/\/2025
\n Console.WriteLine(time.ToString("MM")); \/\/\u5f53\u524d\u6708\u4efd12 \u8868\u793a\u5982\u679c6 \u6253\u537006
\n Console.WriteLine(time.ToString("MMM"));\/\/12\u6708 \u64cd\u4f5c\u7cfb\u7edf\u662fwin11\u662f12\u6708，\u4f4e\u7248\u672c\u7cfb\u7edf\u662f\u5341\u4e8c\u6708
\n Console.WriteLine(time.ToString("MMMM"));\/\/\u5341\u4e8c\u6708
\n Console.WriteLine(time.ToString("dd")); \/\/ \u67d0\u6708\u7684\u7b2c\u51e0\u5929 05
\n Console.WriteLine(time.ToString("ddd")); \/\/\u5468\u4e94
\n Console.WriteLine(time.ToString("dddd"));\/\/\u661f\u671f\u4e94
\n Console.WriteLine(time.ToString("hh")); \/\/12\u5c0f\u65f6\u5236 02
\n Console.WriteLine(time.ToString("HH")); \/\/24\u5c0f\u65f6\u5236 12
\n Console.WriteLine(time.ToString("mm"));\/\/\u5206\u949f 28
\n Console.WriteLine(time.ToString("ss"));\/\/\u79d2
\n Console.WriteLine(time.ToString("fff"));\/\/\u6beb\u79d2\u6570<\/p>\n

\u65f6\u95f4\u6233<\/h4>\n

DateTimeOffset dateTimeOffset =new DateTimeOffset(DateTime.Now);\u65f6\u95f4\u6233\u5bf9\u8c61 \u83b7\u53d6\u8ddd\u79bb\u5f53\u524d\u65f6\u95f4\u7684\u65f6\u95f4\u6233\u5bf9\u8c61<\/p>\n

\/\/new DateTimeOffset(time);\u65f6\u95f4\u6233\u5bf9\u8c61 \u83b7\u53d6\u8ddd\u79bb\u5f53\u524d\u65f6\u95f4\u7684\u65f6\u95f4\u6233\u5bf9\u8c61
\nDateTimeOffset dateTimeOffset = new DateTimeOffset(time);
\nConsole.WriteLine(dateTimeOffset.ToUnixTimeMilliseconds()+""); \/\/\u4ece1970\u5e74\u5230\u76ee\u524d\u4e4b\u524d\u7684\u6beb\u79d2\u6570
\nConsole.WriteLine(dateTimeOffset.ToUnixTimeSeconds() +"");\/\/\u4ece1970\u5e74\u5230\u76ee\u524d\u4e4b\u524d\u7684\u79d2\u6570<\/p>\n

\/\/\u6307\u5b9a\u65f6\u95f4\u521b\u5efa\u65f6\u95f4\u5bf9\u8c61
\nDateTime birthDate = new DateTime(2025, 05, 27, 14, 20, 40);
\nConsole.WriteLine(birthDate.ToString());
\nDateTimeOffset off1 = new DateTimeOffset(birthDate);\/\/\u83b7\u53d6\u51fa\u751f\u7684\u65f6\u95f4\u6233);
\nDateTimeOffset off2=new DateTimeOffset(DateTime.Now);\/\/\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u6233<\/p>\n

Console.WriteLine(off2.ToUnixTimeSeconds() – off1.ToUnixTimeSeconds());\/\/16590804<\/p>\n

\/\/\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e9b\u5b57\u7b26 \u5feb\u901f\u683c\u5f0f\u5316\u65e5\u671f\u5b57\u7b26\u4e32
\nConsole.WriteLine(time.ToString("G"));\/\/2025\/12\/5 14:56:23
\nConsole.WriteLine(time.ToString("F"));\/\/2025\u5e7412\u67085\u65e5 14:56:23
\nConsole.WriteLine(time.ToString("D"));\/\/2025\u5e7412\u67085\u65e5<\/p>\n

Console.WriteLine(time.DayOfYear); \/\/\u83b7\u53d6\u4eca\u5e74\u8fc7\u4e86\u51e0\u5929 339
\nConsole.WriteLine((int)time.DayOfWeek); \/\/\u679a\u4e3e\u7c7b\u578b\u53ef\u4ee5\u8fdb\u884c\u5f3a\u5236\u8f6c\u6210\u6574\u578b\u7684 5 0\u4ee3\u8868\u5468\u65e5
\nConsole.WriteLine(time.ToString("\u4eca\u5e74：yyyy\u5e74"));<\/p>\n

\/\/ \u89e3\u6790\u7f8e\u5f0f\u65e5\u671f（MM\/dd\/yyyy）
\nstring usDateStr = "12\/19\/2025";
\nDateTime usDate = DateTime.Parse(usDateStr, new CultureInfo("en-US"));
\nConsole.WriteLine(usDate); \/\/ \u8f93\u51fa：2025\/12\/19 0:00:00<\/p>\n

\/\/ \u89e3\u6790\u4e2d\u6587\u683c\u5f0f\u65e5\u671f
\nstring cnDateStr = "2025\u5e7412\u670819\u65e5";
\nDateTime cnDate = DateTime.Parse(cnDateStr, new CultureInfo("zh-CN"));
\nConsole.WriteLine(cnDate); \/\/ \u8f93\u51fa：2025\/12\/19 0:00:00 <\/p>\n

\u65e5\u671f\u8ba1\u7b97\u65b9\u6cd5<\/h4>\n

DateTime time = DateTime.Now; \/\/\u83b7\u5f97\u5f53\u524d\u65f6\u95f4
\ntime = time.AddYears(1); \/\/ \u5e74\u4efd\u52a0\u4e00
\ntime = time.AddMonths(1);\/\/\u6708\u4efd\u52a0\u4e00
\ntime = time.AddDays(1);\/\/\u5929\u6570\u4e00
\ntime = time.AddHours(1);\/\/\u5c0f\u65f6\u52a0\u4e00
\ntime = time.AddMinutes(1);\/\/\u5206\u949f \u52a0\u4e00
\ntime = time.AddSeconds(1);\/\/\u79d2 \u52a0\u4e00
\ntime = time.AddMilliseconds(1);\/\/\u6beb\u79d2 \u52a0\u4e00<\/p>\n

Console.WriteLine(time.ToString());\/\/ \u5c06\u65f6\u95f4\u7c7b\u578b（DateTime）\u8f6c\u6362\u4e3a \u5b57\u7b26\u4e32
\ntime = DateTime.Now.AddYears(-10); \/\/ \u5e74\u4efd+（-10） \u4e5f\u5c31\u662f10\u5e74\u524d
\nConsole.WriteLine(time.ToString());\/\/<\/p>\n

if (DateTime.Now < new DateTime(2026, 1, 1)) \/\/\u5f53\u524d\u65f6\u95f4\u4e0e2026\u5e741\u67081\u65e5\u8fdb\u884c\u6bd4\u8f83
\n{
\n Console.WriteLine("2026\u4e4b\u524d");<\/p>\n

}
\nelse
\n{
\n Console.WriteLine("2026\u4e4b\u540e");
\n}
\n\/\/ \u83b7\u53d6\u8ddd\u79bb\u65f6\u95f4\u70b9\u8fd8\u6709\u591a\u957f\u65f6\u95f4\/\/
\n\/\/TimeSpan \u65f6\u95f4\u6807\u7b7e \u65f6\u95f4\u6233
\nTimeSpan span = new DateTime(2026, 1, 1) – DateTime.Now;
\nConsole.WriteLine(span.Days); \/\/\u65f6\u95f4\u70b9\u76f8\u5dee\u5929\u6570
\nConsole.WriteLine(span.TotalSeconds); \/\/\u603b\u79d2\u6570<\/p>\n","protected":false},"excerpt":{"rendered":"

Math\u7c7b\u63d0\u4f9b\u5e38\u7528\u6570\u5b66\u8fd0\u7b97\u65b9\u6cd5，\u5305\u62ec\u53d6\u6574（Floor\/Ceiling\/Round）\u3001\u7edd\u5bf9\u503c（Abs）\u3001\u6700\u5927\u6700\u5c0f\u503c（Max\/Min）\u3001\u5f00\u65b9（Sqrt）\u3001\u5e42\u8fd0\u7b97（Pow）\u3001\u4e09\u89d2\u51fd\u6570（Sin\/Cos\/Tan）\u548c\u5bf9\u6570\u8fd0\u7b97（Log\/Log10）\u3002DateTime\u7c7b\u7528\u4e8e\u65e5\u671f\u65f6\u95f4\u64cd\u4f5c<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55],"topic":[],"class_list":["post-60025","post","type-post","status-publish","format-standard","hentry","category-server","tag-c"],"yoast_head":"\nC#\u57fa\u7840\u5de5\u5177\u6a21\u5757\uff1aMath\u9759\u6001\u7c7b\u3001\u65e5\u671f\u76f8\u5173\u529f\u80fd\u68b3\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/60025.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C#\u57fa\u7840\u5de5\u5177\u6a21\u5757\uff1aMath\u9759\u6001\u7c7b\u3001\u65e5\u671f\u76f8\u5173\u529f\u80fd\u68b3\u7406 - 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