{"id":600,"date":"2021-10-31T13:13:42","date_gmt":"2021-10-31T13:13:42","guid":{"rendered":"https:\/\/turtleflyblog.com\/?p=600"},"modified":"2022-02-28T09:15:50","modified_gmt":"2022-02-28T09:15:50","slug":"c-record","status":"publish","type":"post","link":"https:\/\/turtleflyblog.com\/zh\/2021\/10\/31\/c-record\/","title":{"rendered":"C# Record"},"content":{"rendered":"\n<p>.net 5 \u554f\u4e16\u4e4b\u5f8c\uff0cC# 9\u51fa\u4e86\u65b0\u6a5f\u5236 Record\u3002\u5b83\u4ecb\u65bcReference (\u53c3\u8003)Type\u548cValue Type\u4e4b\u9593\u3002\u5b83\u9069\u5408\u7528\u4f86\u5132\u5b58data(\u985e\u4f3cstruct)\u6578\u64da\uff0c\u4f46\u4e5f\u4fdd\u6709Reference Type\u7279\u6027\u5982\u7e7c\u627f\u548c\u5c01\u88dd\u3002\u56e0\u6b64\u6211\u5011\u53ef\u4ee5\u7528Record\u4f86\u5132\u5b58DTO\u7269\u4ef6\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u63a2\u7d22Record\u7279\u6027\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"570\" height=\"98\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/1.png?resize=570%2C98&#038;ssl=1\" alt=\"\" class=\"wp-image-602\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/1.png?w=570&amp;ssl=1 570w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/1.png?resize=300%2C52&amp;ssl=1 300w\" sizes=\"auto, (max-width: 570px) 100vw, 570px\" \/><\/figure>\n\n\n\n<p>Employee\u7e7c\u627fPerson Record<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"266\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/2.png?resize=554%2C266&#038;ssl=1\" alt=\"\" class=\"wp-image-603\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/2.png?w=554&amp;ssl=1 554w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/2.png?resize=300%2C144&amp;ssl=1 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/figure>\n\n\n\n<p>C# 9 \u65b0\u6a5f\u5236\u5728new record\u6642\u586b\u5bebnew\u5373\u53ef\u3002\u4ee5\u4e0a\u7a0b\u5f0f\u78bc\u986f\u793a\u5982\u4f55\u4f7f\u7528record\u3002Person\u53ea\u5305\u542bdata\uff0c\u529f\u80fd\u985e\u4f3cStruct\u3002\u800cEmployee\u5305\u542bPerson\u5c6c\u6027(Name\u548cAge)\u3002Employee\u7e7c\u627fPerson\u3002\u56e0\u6b64\u6211\u5011\u53ef\u4ee5\u7528Person\u548cEmployee\u5206\u5225\u7528record\u4ee3\u66ffclass\u985e\u5225\u548cstruct\u3002<\/p>\n\n\n\n<p>\u8f38\u51fa\u7d50\u679c\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"104\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/3.png?resize=578%2C104&#038;ssl=1\" alt=\"\" class=\"wp-image-604\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/3.png?w=578&amp;ssl=1 578w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/3.png?resize=300%2C54&amp;ssl=1 300w\" sizes=\"auto, (max-width: 578px) 100vw, 578px\" \/><\/figure>\n\n\n\n<p>Record\u985e\u578b\u8b8a\u6578\u6bd4\u8f03\u6642\u662f\u7528value\u985e\u578b\u6bd4\u8f03\u7684\uff0c\u56e0\u6b64Person josh\u548cjoshSecond\u7684\u5c6c\u6027\u503c\u7686\u76f8\u540c\uff0c\u6240\u4ee5\u6bd4\u8f03\u7d50\u679c(=)\u70batrue\u76f8\u540c\u3002\u4f46record\u662fReference Type(\u53c3\u8003\u985e\u578b)\uff0c\u6240\u4ee5\u7528object.ReferenceEquals\u6bd4\u8f03\u5169\u8005\u6703\u56de\u50b3False\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"448\" height=\"75\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/4.png?resize=448%2C75&#038;ssl=1\" alt=\"\" class=\"wp-image-605\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/4.png?w=448&amp;ssl=1 448w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/4.png?resize=300%2C50&amp;ssl=1 300w\" sizes=\"auto, (max-width: 448px) 100vw, 448px\" \/><\/figure>\n\n\n\n<p><strong>ToString()<\/strong>\u8f38\u51fa\u7d50\u679c\u5462?<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"151\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/5.png?resize=554%2C151&#038;ssl=1\" alt=\"\" class=\"wp-image-606\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/5.png?w=554&amp;ssl=1 554w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/5.png?resize=300%2C82&amp;ssl=1 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/figure>\n\n\n\n<p>\u4ed6\u7684\u8f38\u51fa\u7d50\u679c\u70ba<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"68\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/6.png?resize=554%2C68&#038;ssl=1\" alt=\"\" class=\"wp-image-607\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/6.png?w=554&amp;ssl=1 554w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/6.png?resize=300%2C37&amp;ssl=1 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/figure>\n\n\n\n<p><strong>with-expression<\/strong><\/p>\n\n\n\n<p>\u7576\u6211\u5011\u60f3\u6539\u8b8arecord\u6b04\u4f4d\u503c\u6642\u5019\uff0c\u4f60\u6703\u767c\u73fe\u7121\u6cd5\u6539\u8b8a(imuutable)\u56e0\u70barecord\u662f\u4e0d\u53ef\u8b8a\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"178\" height=\"68\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/7.png?resize=178%2C68&#038;ssl=1\" alt=\"\" class=\"wp-image-608\"\/><\/figure>\n\n\n\n<p>\u9019\u6642\u53ef\u4ee5\u7528with-expression<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"427\" height=\"68\" src=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/8.png?resize=427%2C68&#038;ssl=1\" alt=\"\" class=\"wp-image-609\" srcset=\"https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/8.png?w=427&amp;ssl=1 427w, https:\/\/i0.wp.com\/turtleflyblog.com\/wp-content\/uploads\/2021\/10\/8.png?resize=300%2C48&amp;ssl=1 300w\" sizes=\"auto, (max-width: 427px) 100vw, 427px\" \/><\/figure>\n\n\n\n<p>\u4ee5\u5f80\u6211\u90fd\u4f7f\u7528struct\u4f86\u5132\u5b58\u8cc7\u6599\u56e0\u5b83\u8f03\u5c11\u5360\u7528\u8a18\u61b6\u9ad4\u7a7a\u9593(\u8207class\u76f8\u6bd4)\uff0c\u4f46struct\u4e0d\u662fclass\u6240\u4ee5\u5728\u4e00\u4e9b\u5834\u666f\u6211\u5011\u6703\u8003\u616e\u7a76\u7adf\u8981\u7528class\u6216struct\u4f86\u5b9a\u7fa9\u6578\u64da\u985e\u5225\u3002Record\u7684\u554f\u4e16\u89e3\u6c7a\u4e86\u9019\u554f\u984c\uff0c\u8b93\u958b\u767c\u8005\u591a\u4e86\u4e00\u500b\u5408\u9069\u7684\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>.net 5 \u554f\u4e16\u4e4b\u5f8c\uff0cC# 9\u51fa\u4e86\u65b0\u6a5f\u5236 Record\u3002\u5b83\u4ecb\u65bcReference (\u53c3\u8003)Type\u548cValue Type\u4e4b\u9593\u3002\u5b83\u9069\u5408\u7528\u4f86\u5132\u5b58data(\u985e\u4f3cstruct)\u6578\u64da\uff0c\u4f46\u4e5f\u4fdd\u6709Reference Type\u7279\u6027\u5982\u7e7c\u627f\u548c\u5c01\u88dd\u3002\u56e0\u6b64\u6211\u5011\u53ef\u4ee5\u7528Record\u4f86\u5132\u5b58DTO\u7269\u4ef6\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u63a2\u7d22Record\u7279\u6027\u3002 Employee\u7e7c\u627fPerson Record C# 9 \u65b0\u6a5f\u5236\u5728new record\u6642\u586b\u5bebnew\u5373\u53ef\u3002\u4ee5\u4e0a\u7a0b\u5f0f\u78bc\u986f\u793a\u5982\u4f55\u4f7f\u7528record\u3002Person\u53ea\u5305\u542bdata\uff0c\u529f\u80fd\u985e\u4f3cStruct\u3002\u800cEmployee\u5305\u542bPerson\u5c6c\u6027(Name\u548cAge)\u3002Employee\u7e7c\u627fPerson\u3002\u56e0\u6b64\u6211\u5011\u53ef\u4ee5\u7528Person\u548cEmployee\u5206\u5225\u7528record\u4ee3\u66ffclass\u985e\u5225\u548cstruct\u3002 \u8f38\u51fa\u7d50\u679c\u5982\u4e0b Record\u985e\u578b\u8b8a\u6578\u6bd4\u8f03\u6642\u662f\u7528value\u985e\u578b\u6bd4\u8f03\u7684\uff0c\u56e0\u6b64Person josh\u548cjoshSecond\u7684\u5c6c\u6027\u503c\u7686\u76f8\u540c\uff0c\u6240\u4ee5\u6bd4\u8f03\u7d50\u679c(=)\u70batrue\u76f8\u540c\u3002\u4f46record\u662fReference Type(\u53c3\u8003\u985e\u578b)\uff0c\u6240\u4ee5\u7528object.ReferenceEquals\u6bd4\u8f03\u5169\u8005\u6703\u56de\u50b3False\u3002 ToString()\u8f38\u51fa\u7d50\u679c\u5462? \u4ed6\u7684\u8f38\u51fa\u7d50\u679c\u70ba with-expression \u7576\u6211\u5011\u60f3\u6539\u8b8arecord\u6b04\u4f4d\u503c\u6642\u5019\uff0c\u4f60\u6703\u767c\u73fe\u7121\u6cd5\u6539\u8b8a(imuutable)\u56e0\u70barecord\u662f\u4e0d\u53ef\u8b8a\u7684\u3002 \u9019\u6642\u53ef\u4ee5\u7528with-expression 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