{"id":3514,"date":"2025-04-13T13:37:24","date_gmt":"2025-04-13T05:37:24","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3514"},"modified":"2025-04-13T13:37:24","modified_gmt":"2025-04-13T05:37:24","slug":"c-%e6%9e%9a%e4%b8%be%ef%bc%88enum%ef%bc%89%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/04\/13\/c-%e6%9e%9a%e4%b8%be%ef%bc%88enum%ef%bc%89%e8%af%a6%e8%a7%a3\/","title":{"rendered":"C# \u679a\u4e3e\uff08Enum\uff09\u8be6\u89e3"},"content":{"rendered":"\n<p>\u679a\u4e3e\uff08<code>Enum<\/code>\uff09\u662f C# \u4e2d\u7684\u4e00\u79cd\u7279\u6b8a\u503c\u7c7b\u578b\uff0c\u7528\u4e8e\u5b9a\u4e49\u4e00\u7ec4\u547d\u540d\u5e38\u6570\u3002\u679a\u4e3e\u8ba9\u7a0b\u5e8f\u4e2d\u7684\u5e38\u91cf\u66f4\u52a0\u6613\u8bfb\u4e14\u6709\u7ed3\u6784\u6027\uff0c\u5b83\u5c06\u6574\u6570\u503c\u4e0e\u540d\u79f0\u5173\u8054\u8d77\u6765\uff0c\u65b9\u4fbf\u5bf9\u503c\u8fdb\u884c\u7ba1\u7406\u548c\u64cd\u4f5c\u3002\u901a\u5e38\uff0c\u679a\u4e3e\u7528\u4e8e\u8868\u793a\u72b6\u6001\u3001\u6807\u5fd7\u6216\u5176\u4ed6\u5206\u7c7b\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u679a\u4e3e\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u503c\u7c7b\u578b<\/strong>\uff1a\u679a\u4e3e\u662f\u503c\u7c7b\u578b\uff0c\u5b58\u50a8\u5728\u6808\u4e2d\u3002<\/li>\n\n\n\n<li><strong>\u9ed8\u8ba4\u57fa\u7c7b\u578b<\/strong>\uff1a\u679a\u4e3e\u7684\u5e95\u5c42\u9ed8\u8ba4\u662f <code>int<\/code> \u7c7b\u578b\uff0c\u6bcf\u4e2a\u679a\u4e3e\u503c\u90fd\u6709\u4e00\u4e2a\u6574\u6570\u503c\uff08\u9ed8\u8ba4\u4ece 0 \u5f00\u59cb\u9012\u589e\uff09\u3002<\/li>\n\n\n\n<li><strong>\u53ef\u4ee5\u6307\u5b9a\u5e95\u5c42\u7c7b\u578b<\/strong>\uff1a\u4f60\u53ef\u4ee5\u6307\u5b9a\u679a\u4e3e\u7684\u5e95\u5c42\u7c7b\u578b\uff0c\u5982 <code>byte<\/code>\u3001<code>short<\/code>\u3001<code>long<\/code> \u7b49\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u5b9a\u4e49\u679a\u4e3e<\/h2>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>enum<\/code> \u5173\u952e\u5b57\u6765\u5b9a\u4e49\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\uff0c\u679a\u4e3e\u4e2d\u7684\u6bcf\u4e2a\u9879\u90fd\u6709\u4e00\u4e2a\u5e38\u91cf\u503c\uff0c\u9ed8\u8ba4\u4e3a\u4ece 0 \u5f00\u59cb\u9012\u589e\u7684\u6574\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>enum Day\n{\n    Sunday,    \/\/ 0\n    Monday,    \/\/ 1\n    Tuesday,   \/\/ 2\n    Wednesday, \/\/ 3\n    Thursday,  \/\/ 4\n    Friday,    \/\/ 5\n    Saturday   \/\/ 6\n}<\/code><\/pre>\n\n\n\n<p>\u4f60\u4e5f\u53ef\u4ee5\u663e\u5f0f\u5730\u6307\u5b9a\u679a\u4e3e\u7684\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>enum Day\n{\n    Sunday = 1,\n    Monday = 2,\n    Tuesday = 3,\n    Wednesday = 4,\n    Thursday = 5,\n    Friday = 6,\n    Saturday = 7\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u4f7f\u7528\u679a\u4e3e<\/h2>\n\n\n\n<p>\u4f7f\u7528\u679a\u4e3e\u65f6\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u679a\u4e3e\u540d\u79f0\u6765\u5f15\u7528\u5176\u503c\uff0c\u4e5f\u53ef\u4ee5\u5c06\u5176\u8f6c\u6362\u4e3a\u6574\u6570\u6216\u5176\u4ed6\u7c7b\u578b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Day today = Day.Monday;\nConsole.WriteLine(today);  \/\/ \u8f93\u51fa Monday\nConsole.WriteLine((int)today);  \/\/ \u8f93\u51fa 1\n\nint dayValue = 3;\nDay selectedDay = (Day)dayValue;  \/\/ \u4ece\u6574\u6570\u8f6c\u6362\u56de\u679a\u4e3e\nConsole.WriteLine(selectedDay);  \/\/ \u8f93\u51fa Wednesday<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u679a\u4e3e\u7684\u5e38\u89c1\u64cd\u4f5c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u679a\u4e3e\u5230\u6574\u6570\u7684\u8f6c\u6362<\/h3>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u5c06\u679a\u4e3e\u503c\u8f6c\u6362\u4e3a\u5176\u5e95\u5c42\u7c7b\u578b\uff08\u5982 <code>int<\/code>\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>enum Day\n{\n    Sunday = 1,\n    Monday = 2,\n    Tuesday = 3,\n    Wednesday = 4\n}\n\nDay today = Day.Monday;\nint dayAsInt = (int)today;  \/\/ \u8f6c\u6362\u4e3a\u6574\u6570\nConsole.WriteLine(dayAsInt);  \/\/ \u8f93\u51fa 2<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u6574\u6570\u5230\u679a\u4e3e\u7684\u8f6c\u6362<\/h3>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u5c06\u6574\u6570\u503c\u8f6c\u6362\u4e3a\u679a\u4e3e\u7c7b\u578b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int dayValue = 3;\nDay selectedDay = (Day)dayValue;  \/\/ \u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u679a\u4e3e\u503c\nConsole.WriteLine(selectedDay);  \/\/ \u8f93\u51fa Tuesday<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4f7f\u7528 <code>Enum.GetValues()<\/code> \u83b7\u53d6\u6240\u6709\u679a\u4e3e\u503c<\/h3>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528 <code>Enum.GetValues()<\/code> \u65b9\u6cd5\u83b7\u53d6\u679a\u4e3e\u7c7b\u578b\u7684\u6240\u6709\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>foreach (Day day in Enum.GetValues(typeof(Day)))\n{\n    Console.WriteLine(day);\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u4f7f\u7528 <code>Enum.GetName()<\/code> \u83b7\u53d6\u679a\u4e3e\u540d\u79f0<\/h3>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528 <code>Enum.GetName()<\/code> \u65b9\u6cd5\u6839\u636e\u679a\u4e3e\u503c\u83b7\u53d6\u5bf9\u5e94\u7684\u540d\u79f0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int value = 3;\nstring name = Enum.GetName(typeof(Day), value);\nConsole.WriteLine(name);  \/\/ \u8f93\u51fa Tuesday<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u679a\u4e3e\u7684\u9ad8\u7ea7\u7528\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u6307\u5b9a\u679a\u4e3e\u5e95\u5c42\u7c7b\u578b<\/h3>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u6307\u5b9a\u679a\u4e3e\u7684\u5e95\u5c42\u7c7b\u578b\uff0c\u9ed8\u8ba4\u662f <code>int<\/code>\uff0c\u4f46\u53ef\u4ee5\u4fee\u6539\u4e3a\u5176\u4ed6\u6574\u6570\u7c7b\u578b\uff0c\u5982 <code>byte<\/code>\u3001<code>short<\/code>\u3001<code>long<\/code> \u7b49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>enum Day : byte  \/\/ \u4f7f\u7528 byte \u4f5c\u4e3a\u5e95\u5c42\u7c7b\u578b\n{\n    Sunday = 1,\n    Monday = 2,\n    Tuesday = 3\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u4f7f\u7528\u6807\u5fd7\u679a\u4e3e\uff08Flags\uff09<\/h3>\n\n\n\n<p>\u679a\u4e3e\u4e5f\u53ef\u4ee5\u4e0e\u4f4d\u8fd0\u7b97\u7ed3\u5408\uff0c\u4f7f\u7528 <code>Flags<\/code> \u7279\u6027\u6765\u8868\u793a\u4e00\u7ec4\u4f4d\u7684\u7ec4\u5408\u3002\u8fd9\u5728\u8868\u793a\u4e00\u7ec4\u4e8c\u8fdb\u5236\u6807\u5fd7\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;Flags]\nenum Days\n{\n    Sunday = 1,\n    Monday = 2,\n    Tuesday = 4,\n    Wednesday = 8,\n    Thursday = 16,\n    Friday = 32,\n    Saturday = 64\n}\n\nDays weekend = Days.Saturday | Days.Sunday;  \/\/ \u4f7f\u7528\u4f4d\u8fd0\u7b97\u7ec4\u5408\u503c\nConsole.WriteLine(weekend);  \/\/ \u8f93\u51fa Saturday, Sunday<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u2705 \u5728\u4f7f\u7528 <code>[Flags]<\/code> \u7279\u6027\u65f6\uff0c\u6bcf\u4e2a\u679a\u4e3e\u503c\u5e94\u5f53\u662f 2 \u7684\u5e42\u503c\uff0c\u8fd9\u6837\u5b83\u4eec\u53ef\u4ee5\u901a\u8fc7\u6309\u4f4d\u8fd0\u7b97\u7ec4\u5408\u5728\u4e00\u8d77\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u679a\u4e3e\u7684\u5b9e\u9645\u5e94\u7528<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u793a\u4f8b 1\uff1a\u8868\u793a\u7528\u6237\u89d2\u8272<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>enum Role\n{\n    Admin = 1,\n    User = 2,\n    Guest = 4\n}\n\nRole userRole = Role.Admin | Role.User;  \/\/ \u7528\u6237\u540c\u65f6\u5177\u6709 Admin \u548c User \u89d2\u8272\nConsole.WriteLine(userRole);  \/\/ \u8f93\u51fa Admin, User<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u793a\u4f8b 2\uff1a\u8868\u793a\u661f\u671f\u51e0<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>enum Day\n{\n    Sunday = 1,\n    Monday = 2,\n    Tuesday = 3,\n    Wednesday = 4,\n    Thursday = 5,\n    Friday = 6,\n    Saturday = 7\n}\n\nDay today = Day.Friday;\nConsole.WriteLine($\"Today is: {today}\");  \/\/ \u8f93\u51fa Today is: Friday<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e03\u3001\u53c2\u8003\u6587\u732e\u548c\u6587\u6863<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/dotnet\/csharp\/programming-guide\/enumeration-types\">C# Enum \u6587\u6863 &#8211; Microsoft<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/system.enum.getvalues?view=net-6.0\">Enum.GetValues \u65b9\u6cd5<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/dotnet\/csharp\/programming-guide\/enumeration-types#flags-enum\">C# Flags \u679a\u4e3e\u793a\u4f8b &#8211; Microsoft<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u901a\u8fc7\u679a\u4e3e\uff0c\u4f60\u53ef\u4ee5\u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u548c\u8868\u8fbe\u4e00\u7ec4\u76f8\u5173\u7684\u5e38\u6570\uff0c\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\uff0c\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u679a\u4e3e\uff08Enum\uff09\u662f C# \u4e2d\u7684\u4e00\u79cd\u7279\u6b8a\u503c\u7c7b\u578b\uff0c\u7528\u4e8e\u5b9a\u4e49\u4e00\u7ec4\u547d\u540d\u5e38\u6570\u3002\u679a\u4e3e\u8ba9\u7a0b\u5e8f\u4e2d\u7684\u5e38\u91cf\u66f4\u52a0\u6613\u8bfb\u4e14\u6709\u7ed3\u6784\u6027\uff0c\u5b83\u5c06 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3515,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[],"class_list":["post-3514","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3514","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3514"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3514\/revisions"}],"predecessor-version":[{"id":3516,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3514\/revisions\/3516"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3515"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}