{"id":3714,"date":"2023-06-09T01:03:50","date_gmt":"2023-06-08T17:03:50","guid":{"rendered":"https:\/\/lonelinerd.com\/?p=3714"},"modified":"2023-06-09T01:11:43","modified_gmt":"2023-06-08T17:11:43","slug":"enum-and-flag","status":"publish","type":"post","link":"https:\/\/lonelinerd.com\/index.php\/2023\/06\/09\/enum-and-flag\/","title":{"rendered":"C#\u7b46\u8a18 \u2013 \u679a\u8209\u548c\u4f4d\u6a19\u5fd7"},"content":{"rendered":"\t\t
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\u679a\u8209\u985e\u578b<\/span><\/strong><\/h5>

  • \u300c\u7b26\u865f\u540d\u7a31\/\u503c\u300d\u914d\u5c0d<\/span><\/span><\/span><\/p>

    • public<\/span> enum<\/span> TimePeriod<\/span><\/span>
      {<\/span>
       \u00a0 \u00a0Morning<\/span> =<\/span> 0<\/span>,<\/span>
       \u00a0 \u00a0Afternoon<\/span> =<\/span> 1<\/span>,<\/span>
       \u00a0 \u00a0Night<\/span> =<\/span> 2<\/span><\/span>
      }<\/span><\/pre><\/li><\/ul><\/li>
    • \u985e\u578b\u5b89\u5168<\/span><\/p><\/li>
    • \u6bcf\u500b\u679a\u8209\u985e\u578b\u6d3e\u751f\u81eaSystem.Enum\uff0cSystem.Enum\u6d3e\u751f\u81eaSystem.ValueType\uff0c\u56e0\u6b64\u679a\u8209\u5c6c\u65bc<\/span>\u503c\u985e\u578b<\/span><\/span><\/span><\/p><\/li>
    • \u679a\u8209\u985e\u578b\u5167\u90e8\u4e0d\u80fd\u5b9a\u7fa9\u4efb\u4f55\u65b9\u6cd5\/\u5c6c\u6027\/\u4e8b\u4ef6<\/span><\/p>
      • \u7de8\u8b6f\u679a\u8209\u985e\u578b\u6642\uff0cC#\u7de8\u8b6f\u5668<\/span>\u5c07\u6bcf\u500b\u7b26\u865f\u8f49\u63db\u6210\u985e\u578b\u7684\u4e00\u500b\u5e38\u91cf\u5b57\u6bb5<\/span><\/span><\/span>\uff0c\u4ee5\u4e0a\u9762\u7684TimePeriod\u679a\u8209\u70ba\u4f8b\uff0c\u5176\u5167\u90e8\u5de5\u4f5c\u65b9\u5f0f\u662f\u9019\u6a23\u7684<\/span><\/p>
        • public<\/span> struct<\/span> TimePeriod<\/span> : System<\/span>.Enum<\/span><\/span>
          {<\/span>
           \u00a0 \u00a0\/\/TimePeriod\u7684\u7b26\u865f\u548c\u503c\u5b9a\u7fa9<\/span><\/span>
           \u00a0 \u00a0public<\/span> const<\/span> TimePeriod<\/span> Morning<\/span> =<\/span> (TimerPeriod<\/span>) 0<\/span>;<\/span>
           \u00a0 \u00a0public<\/span> const<\/span> TimePeriod<\/span> Afternoon<\/span> =<\/span> (TimerPeriod<\/span>) 1<\/span>;<\/span>
           \u00a0 \u00a0public<\/span> const<\/span> TimePeriod<\/span> Night<\/span> =<\/span> (TimerPeriod<\/span>) 2<\/span>;<\/span>
           \u00a0 \u00a0<\/span>
           \u00a0 \u00a0public<\/span> int<\/span> value__<\/span>; \/\/\u5305\u542bTimePeriod\u8b8a\u91cf\u7684\u503c\uff0c\u4e0d\u80fd\u901a\u904e\u4ee3\u78bc\u76f4\u63a5\u5f15\u7528<\/span><\/span>
          }<\/span><\/pre><\/li>
        • \u7c21\u55ae\u800c\u8a00\uff0c<\/span>\u679a\u8209\u985e\u578b\u53ea\u662f\u4e00\u500b\u7d50\u69cb\uff0c\u5176\u4e2d\u5b9a\u7fa9\u4e86\u4e00\u7d44\u5e38\u91cf\u5b57\u6bb5\u548c\u4e00\u500b\u5be6\u4f8b\u5b57\u6bb5<\/span><\/span><\/span><\/p>
          • \u5e38\u91cf\u5b57\u6bb5\u6703\u5d4c\u5165\u7a0b\u5e8f\u96c6\u7684\u5143\u6578\u64da\u4e2d\uff0c\u53ef\u901a\u904e\u53cd\u5c04\u4f86\u8a2a\u554f<\/span><\/span><\/span><\/p><\/li>
          • \u56e0\u6b64\uff0c\u652f\u6301\u5728\u904b\u884c\u6642\u7372\u5f97\u8207\u679a\u8209\u985e\u578b\u95dc\u806f\u7684\u6240\u6709\u7b26\u865f\u53ca\u5176\u503c\/\u5c07\u5b57\u7b26\u4e32\u7b26\u865f\u8f49\u63db\u6210\u5c0d\u61c9\u7684\u6578\u503c<\/span><\/p>
            • \u9019\u4e9b\u64cd\u4f5c\u7531System.Enum\u7684\u975c\u614b\u65b9\u6cd5\u63d0\u4f9b<\/span><\/p>
              • GetUnderlyingType\uff1a\u8fd4\u56de\u7528\u65bc\u5bb9\u7d0d\u4e00\u500b\u679a\u8209\u985e\u578b\u7684\u503c\u7684\u57fa\u790e\u985e\u578b<\/span><\/span><\/span><\/p>
                • \u57fa\u790e\u985e\u578b\u9ed8\u8a8d\u70baint\uff0c\u4e5f\u53ef\u4ee5\u8072\u660e\u70ba\u5176\u4ed6\u7684\u57fa\u5143\u503c\u985e\u578b<\/span><\/p>
                  • public<\/span> enum<\/span> EnumBasicType<\/span> : ushort<\/span><\/span>
                    {<\/span>
                     \u00a0 \u00a0Basic<\/span>,<\/span>
                     \u00a0 \u00a0Normal<\/span>,<\/span>
                     \u00a0 \u00a0Hard<\/span><\/span>
                    }<\/span><\/pre><\/li><\/ul><\/li><\/ul><\/li>
                  • GetValues\uff1a\u8fd4\u56de\u679a\u8209\u985e\u578b\u4e2d\u7b26\u865f\u7684\u6578\u7d44<\/span><\/span><\/span><\/p><\/li>
                  • Parse\/TryParse\uff1a\u5c07\u7b26\u865f\u8f49\u63db\u70ba\u679a\u8209\u985e\u578b\u7684\u5be6\u4f8b<\/span><\/p><\/li>
                  • IsDefined\uff1a\u5224\u65b7\u6578\u503c\u5c0d\u65bc\u679a\u8209\u985e\u578b\u662f\u5426\u5408\u6cd5<\/span><\/p>
                    • \u67e5\u627e\u5340\u5206\u5927\u5c0f\u5beb<\/span><\/p><\/li>
                    • \u5167\u90e8\u4f7f\u7528\u4e86\u53cd\u5c04\uff0c\u901f\u5ea6\u5f88\u6162<\/span><\/p><\/li>
                    • \u679a\u8209\u985e\u578b\u5728\u8abf\u7528IsDefined\u7684\u540c\u4e00\u7a0b\u5e8f\u96c6\u4e2d\u5b9a\u7fa9\u624d\u53ef\u4f7f\u7528<\/span><\/p><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li>
                    • \u4f46\u53ef\u4ee5<\/span>\u4f7f\u7528\u300c\u64f4\u5c55\u65b9\u6cd5\u300d\u70ba\u679a\u8209\u985e\u578b\u63d0\u4f9b\u65b9\u6cd5<\/span><\/span><\/span><\/p>
                      • class<\/span> Program<\/span><\/span>
                        {<\/span>
                         \u00a0 \u00a0static<\/span> void<\/span> Main<\/span>(string<\/span>[] args<\/span>)<\/span>
                         \u00a0  { \u00a0 \u00a0 \u00a0 \u00a0<\/span>
                         \u00a0 \u00a0 \u00a0 \u00a0TimePeriod<\/span> tp<\/span> =<\/span> TimePeriod<\/span>.Morning<\/span>;<\/span>
                         \u00a0 \u00a0 \u00a0 \u00a0Console<\/span>.WriteLine<\/span>(tp<\/span>.IsMorning<\/span>()); \/\/True<\/span><\/span>
                         \u00a0  }<\/span>
                        }<\/span>
                        public<\/span> static<\/span> class<\/span> TimePeriodExtension<\/span><\/span>
                        {<\/span>
                         \u00a0 \u00a0public<\/span> static<\/span> bool<\/span> IsMorning<\/span>(this<\/span> TimePeriod<\/span> t<\/span>)<\/span>
                         \u00a0  {<\/span>
                         \u00a0 \u00a0 \u00a0 \u00a0return<\/span> t<\/span> ==<\/span> TimePeriod<\/span>.Morning<\/span>;<\/span>
                         \u00a0  }<\/span>
                        }<\/span><\/pre><\/li><\/ul><\/li><\/ul><\/li>
                      • C#\u7de8\u8b6f\u5668\u628a\u679a\u8209\u985e\u578b\u8996\u70ba\u57fa\u5143\u985e\u578b\uff0c\u6240\u4ee5\u53ef\u7528\u8a31\u591a\u64cd\u4f5c\u7b26\uff08==\u3001!=\u3001>\u3001<\u7b49\u7b49\uff09\u4f86\u64cd\u7e31\u679a\u8209\u985e\u578b\u7684\u5be6\u4f8b<\/span><\/span><\/span><\/p>
                        • \u6240\u6709\u9019\u4e9b\u64cd\u4f5c\u7b26<\/span>\u5be6\u969b\u4f5c\u7528\u65bc\u6bcf\u500b\u679a\u8209\u985e\u578b\u5be6\u4f8b\u5167\u90e8\u7684value__\u5be6\u4f8b\u5b57\u6bb5<\/span><\/span><\/span><\/p><\/li><\/ul><\/li>
                        • \u679a\u8209\u985e\u578b\u901a\u5e38\u8207\u9700\u8981\u5b83\u7684\u985e\u540c\u7d1a<\/span><\/p><\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                          \u4f4d\u6a19\u5fd7<\/span><\/strong><\/h5>
                          • \u901a\u5e38\u7528\u679a\u8209\u985e\u578b\u4f86\u8868\u793a\u4e00\u7d44\u53ef\u4ee5\u7d44\u5408\u7684\u4f4d\u6a19\u5fd7\uff0c\u5982FileAttributes<\/span><\/p>
                            • namespace<\/span> System<\/span>.IO<\/span><\/span>
                              {<\/span>
                               \u00a0  [Flags<\/span>]<\/span>
                               \u00a0 \u00a0public<\/span> enum<\/span> FileAttributes<\/span><\/span>
                               \u00a0  {<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0ReadOnly<\/span> =<\/span> 1<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Hidden<\/span> =<\/span> 2<\/span>, \u00a0 \u00a0 \u00a0 \u00a0<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0System<\/span> =<\/span> 4<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Directory<\/span> =<\/span> 16<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Archive<\/span> =<\/span> 32<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Device<\/span> =<\/span> 64<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Normal<\/span> =<\/span> 128<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Temporary<\/span> =<\/span> 256<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0SparseFile<\/span> =<\/span> 512<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0ReparsePoint<\/span> =<\/span> 1024<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Compressed<\/span> =<\/span> 2048<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Offline<\/span> =<\/span> 4096<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0NotContentIndexed<\/span> =<\/span> 8192<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0Encrypted<\/span> =<\/span> 16384<\/span>,<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0IntegrityStream<\/span> =<\/span> 32768<\/span>, \u00a0 \u00a0 \u00a0 \u00a0<\/span>
                               \u00a0 \u00a0 \u00a0 \u00a0NoScrubData<\/span> =<\/span> 131072<\/span><\/span>
                               \u00a0  }<\/span>
                              }<\/span><\/pre><\/li><\/ul><\/li>
                            • \u5b9a\u7fa9\u7528\u65bc\u6a19\u8b58\u4f4d\u6a19\u5fd7\u7684\u679a\u8209\u985e\u578b\u6642\uff0c<\/span>\u61c9\u986f\u5f0f\u70ba\u6bcf\u500b\u7b26\u865f\u5206\u914d\u4e00\u500b\u6578\u503c<\/span><\/span><\/span><\/p>
                              • \u6bcf\u500b\u7b26\u865f\u90fd\u6709\u55ae\u7368\u7684\u4e00\u500b\u4f4d\u8655\u65bcon\u72c0\u614b<\/span><\/p><\/li><\/ul><\/li>
                              • \u61c9\u5b9a\u7fa9\u4e00\u500b\u503c\u70ba0\u7684None\u7b26\u865f<\/span><\/span><\/span><\/p><\/li>
                              • \u6700\u597d\u61c9\u7528\u7279\u6027<\/span>System.Flags\/System.FlagsAttribute<\/span><\/span><\/span><\/p>
                                • \u6aa2\u6e2c\u5230Flags\u7279\u6027\u5f8c\uff0c\u64cd\u4f5c\u5c31\u4e0d\u6703\u628a\u6578\u503c\u8996\u70ba\u55ae\u7368\u7684\u503c\uff0c\u800c\u662f\u4e00\u7d44\u4f4d\u6a19\u5fd7\uff0c\u4e26\u6839\u64da\u64cd\u4f5c\u5c0d\u6578\u503c\u548c\u679a\u8209\u5b9a\u7fa9\u7684\u300c\u7b26\u865f\/\u503c\u300d\u6578\u9032\u884c\u300c\u6309\u4f4d\u8207\u300d\/\u300c\u6309\u4f4d\u6216\u300d\u904b\u7b97<\/span><\/span><\/span><\/p>
                                  • ToString\uff1a\u6309\u4f4d\u8207<\/span><\/p><\/li>
                                  • Parse\/TryParse\uff1a\u6309\u4f4d\u6216<\/span><\/p><\/li><\/ul><\/li><\/ul><\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                                    \n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                                    \u53c3\u8003\u66f8\u76ee<\/span><\/strong><\/span><\/h4>
                                    • \u300aCLR via C#\u300b\uff08\u7b2c4\u7248\uff09 Jeffrey Richter<\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"
                                      \u679a\u8209\u985e\u578b\u662f\u4e00\u7d44\u503c\u985e\u578b\u7684\u300c\u7b26\u865f\u540d\u7a31\/\u503c\u300d\u7684\u914d\u5c0d\uff0c\u5b83\u662f\u985e\u578b\u5b89\u5168\u7684\u3002\u7de8\u8b6f\u679a\u8209\u985e\u578b\u6642\uff0cC#\u7de8\u8b6f\u5668\u6703\u5c07\u6bcf\u500b\u7b26\u865f\u8f49\u63db\u6210\u985e\u578b\u7684\u4e00\u500b\u5e38\u91cf\u5b57\u6bb5<\/p>\n","protected":false},"author":1,"featured_media":947,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,27,18],"tags":[],"class_list":["post-3714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-reading-notes","category-c-sharp","category-developing"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/lonelinerd.com\/wp-content\/uploads\/2021\/03\/FeatureCover_ReadingNotes.png","_links":{"self":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/3714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/comments?post=3714"}],"version-history":[{"count":5,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/3714\/revisions"}],"predecessor-version":[{"id":3720,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/3714\/revisions\/3720"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/media\/947"}],"wp:attachment":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/media?parent=3714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/categories?post=3714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/tags?post=3714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}