{"id":3065,"date":"2023-05-11T00:57:48","date_gmt":"2023-05-10T16:57:48","guid":{"rendered":"https:\/\/lonelinerd.com\/?p=3065"},"modified":"2023-05-16T00:47:16","modified_gmt":"2023-05-15T16:47:16","slug":"class-basic-1","status":"publish","type":"post","link":"https:\/\/lonelinerd.com\/index.php\/2023\/05\/11\/class-basic-1\/","title":{"rendered":"C#\u7b46\u8a18 \u2013 \u985e\u578b\u57fa\u790e\uff08\u4e00\uff09 C#\u985e\u578b\u7cfb\u7d71"},"content":{"rendered":"\t\t
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C#\u985e\u578b\u7cfb\u7d71<\/span><\/strong><\/h5>

  • C#\u7684\u985e\u578b\u7cfb\u7d71\u662f\u975c\u614b\u7684\u3001\u986f\u5f0f\u7684\u3001\u5b89\u5168\u7684<\/span><\/span><\/span><\/p><\/li><\/ul>

    \u975c\u614b\/\u52d5\u614b\u985e\u578b<\/span><\/strong><\/h5>

    • \u975c\u614b\uff1a<\/span>\u6bcf\u500b\u8b8a\u91cf\u90fd\u6709\u4e00\u500b\u7279\u5b9a\u7684\u985e\u578b\uff0c\u800c\u4e14\u5728\u7de8\u8b6f\u6642\u5df2\u77e5\u3002<\/span><\/span><\/span>\u53ea\u6709\u8a72\u985e\u578b\u5df2\u77e5\u7684\u64cd\u4f5c\u624d\u662f\u5141\u8a31\u7684\uff0c\u7531\u7de8\u8b6f\u5668\u5f37\u5236\u751f\u6548\u3002<\/span><\/p>

      • \u975c\u614b\u6240\u6307\u7684\u662f<\/span>\u300c\u8868\u9054\u5f0f\u7684\u7de8\u8b6f\u6642\u985e\u578b\u300d<\/span><\/span><\/span>\uff0c\u56e0\u70ba\u5b83\u5011\u4f7f\u7528\u4e0d\u8b8a\u7684\u6578\u64da\u4f86\u5206\u6790\u54ea\u4e9b\u64cd\u4f5c\u53ef\u7528\u3002<\/span><\/p><\/li><\/ul><\/li>

      • \u52d5\u614b\uff1a\u8b8a\u91cf\u4e2d\u542b\u6709\u503c\uff0c\u4f46\u503c\u4e0d\u9650\u65bc\u7279\u5b9a\u7684\u985e\u578b\uff0c\u6240\u4ee5\u7de8\u8b6f\u5668\u4e0d\u80fd\u57f7\u884c\u76f8\u540c\u5f62\u5f0f\u7684\u6aa2\u67e5 =><\/span>\u00a0\u901a\u904e\u5728\u57f7\u884c\u6642\u52d5\u614b\u6aa2\u67e5\u985e\u578b\u3002<\/span><\/span><\/span><\/p><\/li><\/ul>

        \u986f\u5f0f\/\u96b1\u5f0f\u985e\u578b<\/span><\/strong><\/h5>

        • \u986f\/\u96b1\u5f0f\u985e\u578b\u5340\u5225\u53ea\u5728\u975c\u614b\u985e\u578b\u8a9e\u8a00\u4e2d\u6709\u610f\u7fa9<\/span><\/p><\/li>

        • \u986f\u793a\u985e\u578b\uff1a<\/span>\u8b8a\u91cf\u985e\u578b\u90fd\u5fc5\u9808\u5728\u8072\u660e\u4e2d\u986f\u5f0f\u6307\u660e<\/span><\/span><\/span><\/p>

          • \u975evar\u7684\u5176\u4ed6\u985e\u578b<\/span><\/p><\/li><\/ul><\/li>

          • \u96b1\u5f0f\u985e\u578b\uff1a<\/span>\u6839\u64da\u8b8a\u91cf\u7684\u7528\u9014\u4f86\u63a8\u65b7\u8b8a\u91cf\u985e\u578b<\/span><\/span><\/span><\/p>

            • var<\/span><\/p><\/li><\/ul><\/li>

            • \u7121\u8ad6\u662f\u986f\u5f0f\u9084\u662f\u96b1\u5f0f\uff0c\u985e\u578b\u5728\u7de8\u8b6f\u6642\u90fd\u662f\u5df2\u77e5\u7684\uff0c\u7de8\u8b6f\u6642\u6839\u64da\u8b8a\u91cf\u7684\u7528\u9014\u7684\u63a8\u65b7\uff1b\u4e0d\u540c\u52d5\u614b\u985e\u578b\uff0c\u52d5\u614b\u985e\u578b\u662f\u5728\u57f7\u884c\u6642\u624d\u5224\u65b7\u3002<\/span><\/span><\/span><\/p><\/li><\/ul>

              \u985e\u578b\u5b89\u5168\/\u4e0d\u5b89\u5168<\/span><\/strong><\/h5>

              • \u5b89\u5168\uff1a<\/span>\u5fc5\u9808\u9032\u884c\u985e\u578b\u7684\u8f49\u63db\u624d\u53ef\u4ee5\u6307\u660e\u4e00\u7a2e\u985e\u578b\u70ba\u53e6\u4e00\u7a2e\u985e\u578b\u7684\u6578\u64da<\/span><\/span><\/span><\/p><\/li>

              • \u4e0d\u5b89\u5168\uff1a<\/span>\u4e0d\u5fc5\u9032\u884c\u4efb\u4f55\u8f49\u63db\u5c31\u53ef\u4ee5\u628a\u4e00\u500b\u985e\u578b\u7684\u503c\u7576\u4f5c\u53e6\u4e00\u500b\u5b8c\u5168\u4e0d\u540c\u7684\u985e\u578b\u7684\u503c<\/span><\/span><\/span><\/p>

                • \u4ee3\u78bc\u6709\u6642\u6703\u4ee5\u932f\u8aa4\u7684\u65b9\u5f0f\u6aa2\u67e5\u503c\u4e2d\u7684\u539f\u59cb\u5b57\u7bc0\u5e76\u89e3\u91cb\u4ed6\u5011<\/span><\/p><\/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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                  \u985e\u578b\u8f49\u63db<\/span><\/strong><\/h5>

                  • \u5728C#\u4e2d\uff0c\u5411<\/span>\u57fa\u985e\u7684\u8f49\u63db\u88ab\u8a8d\u70ba\u662f\u4e00\u7a2e\u5b89\u5168\u7684\u96b1\u5f0f\u8f49\u63db\uff1b\u5411\u6d3e\u751f\u985e\u7684\u8f49\u63db\u5247\u9700\u8981\u986f\u5f0f\u6307\u5b9a<\/span><\/span><\/span><\/p>

                    • class<\/span> Employee<\/span>{ }<\/span>
                      public<\/span> static<\/span> void<\/span> Main<\/span>()<\/span>
                      {<\/span>
                       \u00a0 \u00a0\/\/Object\u662fEmployee\u7684\u57fa\u985e\uff0c\u53ef\u96b1\u5f0f\u8f49\u63db<\/span><\/span>
                       \u00a0 \u00a0Object<\/span> o<\/span> =<\/span> new<\/span> Employee<\/span>();<\/span>
                       \u00a0 \u00a0<\/span>
                       \u00a0 \u00a0\/\/Employee\u6d3e\u751f\u81eaObject<\/span><\/span>
                       \u00a0 \u00a0\/\/\u9700\u8981\u986f\u5f0f\u8f49\u63db<\/span><\/span>
                       \u00a0 \u00a0Employee<\/span> e<\/span> =<\/span> (Employee<\/span>)o<\/span>;<\/span>
                      }<\/span><\/pre><\/li><\/ul><\/li><\/ul>
                      \u4f7f\u7528C#\u7684is\u548cas\u64cd\u4f5c\u7b26\u8f49\u578b<\/span><\/strong><\/h5>
                      • is\u64cd\u4f5c\u7b26\u6aa2\u67e5\u5c0d\u8c61\u662f\u5426\u517c\u5bb9\u65bc\u6307\u5b9a\u985e\u578b\uff0c\u8fd4\u56de\u4e00\u500bbool\u503c\u3002<\/span><\/span><\/span><\/p>
                        • is\u64cd\u4f5c\u7b26\u6c38\u9060\u4e0d\u62cb\u51fa\u7570\u5e38<\/span><\/span><\/span><\/p><\/li>
                        • \u5982\u679c\u5c0d\u8c61\u5f15\u7528\u70banull\uff0cis\u7e3d\u662f\u8fd4\u56defalse<\/span><\/span><\/span><\/p><\/li>
                        • Object<\/span> o<\/span> =<\/span> new<\/span> Object<\/span>();<\/span>
                          bool<\/span> b1<\/span> =<\/span> o<\/span> is<\/span> Object<\/span>; \/\/True<\/span><\/span>
                          bool<\/span> b2<\/span> =<\/span> o<\/span> is<\/span> Employee<\/span>; \/\/False<\/span><\/span><\/pre><\/li><\/ul><\/li>
                        • is\u7684\u4f7f\u7528<\/span><\/p>
                          • if<\/span>(o<\/span> is<\/span> Employee<\/span>)<\/span>
                            {<\/span>
                             \u00a0 \u00a0Employee<\/span> e<\/span> =<\/span> (Employee<\/span>)o<\/span>;<\/span>
                             \u00a0  ...<\/span>
                            }<\/span><\/pre><\/li>
                          • \u5728\u8a72\u4ee3\u78bc\u4e2d\uff0c<\/span>CLR\u5be6\u969b\u6aa2\u67e5\u4e86\u5169\u6b21\u5c0d\u8c61\u7684\u985e\u578b<\/span><\/span><\/span><\/p>
                            • \u7b2c\u4e00\u6b21\uff0c<\/span>is\u9996\u5148\u6aa2\u67e5o\u662f\u5426\u517c\u5bb9\u65bcEmployee\u985e\u578b<\/span><\/span><\/span><\/p><\/li>
                            • \u7b2c\u4e8c\u6b21\uff0c\u5982\u679co\u517c\u5bb9\u65bcEmployee\u985e\u578b\uff0c\u5728if\u8a9e\u53e5\u5167\u90e8\uff0c<\/span>\u5c0do\u9032\u884c\u8f49\u578b\u6642<\/span><\/span><\/span>\uff1a\uff08Employee\uff09o\u3002<\/span><\/p>
                              • CLR\u518d\u6b21\u6838\u5be6o\u662f\u5426\u53ef\u4ee5\u986f\u5f0f\u8f49\u63db\u6210Employee<\/span><\/span><\/span><\/p><\/li><\/ul><\/li>
                              • \u52a0\u5f37\u4e86\u5b89\u5168\u6027\uff0c\u4f46\u662f\u5c0d\u6027\u80fd\u6709\u4e00\u5b9a\u5f71\u97ff<\/span><\/p>
                                • CLR\u9996\u5148\u5fc5\u9808\u5224\u65b7\u8b8a\u91cf\uff08o\uff09\u5f15\u7528\u7684\u5c0d\u8c61\u7684\u5be6\u969b\u985e\u578b<\/span><\/p><\/li>
                                • \u7136\u5f8cCLR\u5fc5\u9808\u904d\u6b77\u7e7c\u627f\u5c64\u6b21\u7d50\u69cb\uff0c\u7528\u6bcf\u500b\u57fa\u985e\u578b\u53bb\u6aa2\u67e5\u6307\u5b9a\u7684\u985e\u578b\uff08Employee\uff09<\/span><\/p><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li>
                                • \u70ba\u4e86\u63d0\u5347is\u7684\u6027\u80fd\uff0cC#\u63d0\u4f9b\u4e86<\/span>as\u64cd\u4f5c\u7b26<\/span><\/span><\/span><\/p>
                                  • Employee<\/span> e<\/span> =<\/span> o<\/span> as<\/span> Employee<\/span>;<\/span>
                                    if<\/span>(e<\/span> !=<\/span> null<\/span>)<\/span>
                                    {<\/span>
                                     \u00a0  ...<\/span>
                                    }<\/span><\/pre><\/li>
                                  • \u5982\u679c\u4f7f\u7528\u4e86as\u64cd\u4f5c\u7b26\uff0c<\/span>CLR\u53ea\u9808\u6838\u5be6o\u662f\u5426\u517c\u5bb9\u65bcEmployee\u985e\u578b<\/span><\/span><\/span><\/p>
                                    • \u5982\u679c\u662f\uff0cas\u8fd4\u56de\u5c0d\u540c\u4e00\u500b\u5c0d\u8c61\u7684\u975enull\u5f15\u7528<\/span><\/p><\/li>
                                    • \u5982\u679c\u4e0d\u662f\uff0cas\u8fd4\u56denull<\/span><\/span><\/span><\/p><\/li>
                                    • \u56e0\u6b64as\u64cd\u4f5c\u7b26\u9020\u6210<\/span>CLR\u53ea\u6821\u9a57\u4e00\u6b21\u5c0d\u8c61\u985e\u578b\uff0cif\u8a9e\u53e5\u53ea\u6aa2\u67e5as\u8fd4\u56de\u503c\u662f\u5426\u70banull\uff08\u6bd4\u985e\u578b\u6821\u9a57\u8981\u5feb\u5f97\u591a\uff09<\/span><\/span><\/span><\/p><\/li><\/ul><\/li>
                                    • as\u7684\u5de5\u4f5c\u65b9\u5f0f\u8207\u5f37\u5236\u985e\u578b\u8f49\u63db\u4e00\u6a23\uff0c\u4f46\u662fas\u8f49\u578b\u5931\u6557\u4e0d\u6703\u62cb\u51fa\u7570\u5e38\uff0c\u53ea\u662f\u8fd4\u56de\u4e00\u500bnull<\/span><\/span><\/span><\/p>
                                      • \u5f37\u5236\u985e\u578b\u8f49\u63db\uff1a(Employee) o;<\/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>
                                        • \u300a\u6df1\u5165\u7406\u89e3C#\u300b\uff08\u7b2c3\u7248\uff09 Jon Skeet<\/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":"
                                          C#\u7684\u985e\u578b\u7cfb\u7d71\u662f\u975c\u614b\u7684\u3001\u986f\u5f0f\u7684\u3001\u5b89\u5168\u7684<\/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-3065","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\/3065","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=3065"}],"version-history":[{"count":41,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/3065\/revisions"}],"predecessor-version":[{"id":3151,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/3065\/revisions\/3151"}],"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=3065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/categories?post=3065"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/tags?post=3065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}