{"id":3562,"date":"2025-04-19T10:10:03","date_gmt":"2025-04-19T02:10:03","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3562"},"modified":"2025-04-19T10:10:03","modified_gmt":"2025-04-19T02:10:03","slug":"c-%e4%b8%ad%e7%9a%84%e5%b1%9e%e6%80%a7%ef%bc%88property%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/04\/19\/c-%e4%b8%ad%e7%9a%84%e5%b1%9e%e6%80%a7%ef%bc%88property%ef%bc%89\/","title":{"rendered":"C# \u4e2d\u7684\u5c5e\u6027\uff08Property\uff09"},"content":{"rendered":"\n

\u672c\u7ae0\u8282\u5168\u9762\u3001\u6df1\u5165\u5730\u8bb2\u89e3 C# \u4e2d\u7684\u5c5e\u6027\uff08Property\uff09<\/strong>\uff0c\u5e76\u9644\u5e26\u8be6\u5b9e\u7684\u8bed\u6cd5\u3001\u673a\u5236\u5206\u6790\u3001\u4f7f\u7528\u573a\u666f\u3001\u8fdb\u9636\u6280\u5de7\uff0c\u4ee5\u53ca\u771f\u5b9e\u6848\u4f8b\u3002<\/p>\n\n\n\n

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\u4e00\u3001\u4ec0\u4e48\u662f C# \u5c5e\u6027\uff08Property\uff09<\/h2>\n\n\n\n

\u5c5e\u6027\uff08Property\uff09<\/strong> \u662f C# \u4e2d\u7528\u4e8e\u5c01\u88c5\u5b57\u6bb5\uff08Field\uff09\u7684\u4e00\u79cd\u6210\u5458\u673a\u5236\uff0c\u8ba9\u4f60\u53ef\u4ee5\u50cf\u8bbf\u95ee\u5b57\u6bb5\u4e00\u6837\u4f7f\u7528 getter \u548c setter\uff0c\u800c\u4e0d\u76f4\u63a5\u66b4\u9732\u5b57\u6bb5\u672c\u8eab\u3002<\/p>\n\n\n\n

\u5b83\u672c\u8d28\u4e0a\u662f\u65b9\u6cd5\uff08get<\/code>\/set<\/code>\uff09\u7684\u8bed\u6cd5\u7cd6\uff0c\u5c5e\u4e8e \u9762\u5411\u5bf9\u8c61\u5c01\u88c5\u539f\u5219<\/strong> \u7684\u4f53\u73b0\u3002<\/p>\n\n\n\n

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\u4e8c\u3001\u57fa\u672c\u8bed\u6cd5\u7ed3\u6784<\/h2>\n\n\n\n
public class Person\n{\n    private string name;\n\n    public string Name\n    {\n        get { return name; }\n        set { name = value; }\n    }\n}<\/code><\/pre>\n\n\n\n
\u7b49\u4ef7\u4e8e\uff1a<\/p>\n\n\n\n
public string Name { get; set; }<\/code><\/pre>\n\n\n\n
\u8fd9\u662f C# \u4e2d\u7684 \u81ea\u52a8\u5c5e\u6027<\/strong>\uff08Auto-Implemented Property\uff09\u3002<\/p>\n\n\n\n
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\u4e09\u3001\u5c5e\u6027\u8bbf\u95ee\u5668\u8bf4\u660e<\/h2>\n\n\n\n
\u8bbf\u95ee\u5668<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
get<\/code><\/td>\u83b7\u53d6\u5c5e\u6027\u7684\u503c<\/td><\/tr>
set<\/code><\/td>\u8bbe\u7f6e\u5c5e\u6027\u7684\u503c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u4f60\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u53ea\u8bfb\u6216\u53ea\u5199\uff1a<\/p>\n\n\n\n
public string Name { get; }            \/\/ \u53ea\u8bfb\u5c5e\u6027\npublic string Password { private get; set; } \/\/ \u516c\u5171 set\uff0c\u79c1\u6709 get<\/code><\/pre>\n\n\n\n
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\u56db\u3001\u5c5e\u6027\u80cc\u540e\u7684 IL \u672c\u8d28<\/h2>\n\n\n\n
\u81ea\u52a8\u5c5e\u6027\u5728 IL \u4e2d\u4f1a\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u9690\u85cf\u5b57\u6bb5\uff1a<\/p>\n\n\n\n
\/\/ \u7f16\u8bd1\u5668\u80cc\u540e\u5b9e\u73b0\nprivate string <Name>k__BackingField;\n\npublic string Name\n{\n    get => <Name>k__BackingField;\n    set => <Name>k__BackingField = value;\n}<\/code><\/pre>\n\n\n\n
\n
\u2714\ufe0f \u5de5\u5177\u63a8\u8350\uff1a\u4f7f\u7528 ILSpy<\/a> \u6216 dotPeek<\/code> \u53ef\u67e5\u770b\u5e95\u5c42\u5b9e\u73b0\u3002<\/p>\n<\/blockquote>\n\n\n\n
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\u4e94\u3001\u5c5e\u6027\u9ad8\u7ea7\u7528\u6cd5<\/h2>\n\n\n\n
1\ufe0f\u20e3 \u8868\u8fbe\u5f0f\u4f53\u5c5e\u6027\uff08C# 6+\uff09<\/h3>\n\n\n\n
public int Age => DateTime.Now.Year - BirthYear;<\/code><\/pre>\n\n\n\n
\n
\u4ec5\u53ea\u8bfb\u53ef\u7528\uff0c\u9002\u7528\u4e8e\u7b80\u5355\u903b\u8f91\u3002<\/p>\n<\/blockquote>\n\n\n\n
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2\ufe0f\u20e3 \u79c1\u6709 set \/ \u521d\u59cb\u5316\u5668<\/h3>\n\n\n\n
public string Name { get; private set; } = \"\u9ed8\u8ba4\u503c\";<\/code><\/pre>\n\n\n\n
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3\ufe0f\u20e3 \u5c5e\u6027\u6821\u9a8c\uff08\u5e26\u903b\u8f91\uff09<\/h3>\n\n\n\n
private int age;\npublic int Age\n{\n    get => age;\n    set\n    {\n        if (value < 0) throw new ArgumentException(\"\u5e74\u9f84\u4e0d\u80fd\u4e3a\u8d1f\u6570\");\n        age = value;\n    }\n}<\/code><\/pre>\n\n\n\n
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4\ufe0f\u20e3 \u9759\u6001\u5c5e\u6027<\/h3>\n\n\n\n
public static string AppName { get; set; } = \"MyApp\";<\/code><\/pre>\n\n\n\n
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5\ufe0f\u20e3 \u7d22\u5f15\u5668\u5c5e\u6027\uff08\u7c7b\u4f3c\u6570\u7ec4\uff09<\/h3>\n\n\n\n
public string this[int index]\n{\n    get => items[index];\n    set => items[index] = value;\n}<\/code><\/pre>\n\n\n\n
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\u516d\u3001\u5c5e\u6027 VS \u5b57\u6bb5 VS \u65b9\u6cd5<\/h2>\n\n\n\n
\u7279\u6027<\/th>\u5b57\u6bb5\uff08Field\uff09<\/th>\u5c5e\u6027\uff08Property\uff09<\/th>\u65b9\u6cd5\uff08Method\uff09<\/th><\/tr><\/thead>
\u5c01\u88c5\u6027<\/td>\u274c \u4f4e<\/td>\u2705 \u9ad8<\/td>\u2705<\/td><\/tr>
\u8bbf\u95ee\u5f62\u5f0f<\/td>obj.name<\/code><\/td>obj.Name<\/code><\/td>obj.GetName()<\/code><\/td><\/tr>
\u53ef\u7ee7\u627f\u6027<\/td>\u274c \u9650<\/td>\u2705 \u53ef\u91cd\u5199<\/td>\u2705<\/td><\/tr>
\u6570\u636e\u7ed1\u5b9a\u652f\u6301<\/td>\u274c \u65e0<\/td>\u2705 \u5f3a<\/td>\u2705<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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\u4e03\u3001\u5b9e\u9645\u573a\u666f\u6848\u4f8b<\/h2>\n\n\n\n
\u2705 \u6848\u4f8b\uff1a\u5b9e\u4f53\u7c7b\u5c01\u88c5 + \u9a8c\u8bc1<\/h3>\n\n\n\n
public class User\n{\n    private string email;\n\n    public string Email\n    {\n        get => email;\n        set\n        {\n            if (!value.Contains(\"@\")) throw new Exception(\"Email \u4e0d\u5408\u6cd5\");\n            email = value;\n        }\n    }\n}<\/code><\/pre>\n\n\n\n
\n
\ud83d\udd0d \u7528\u5c5e\u6027\u800c\u4e0d\u662f\u5b57\u6bb5\uff0c\u53ef\u4ee5\u505a\u5230\u96c6\u4e2d\u6821\u9a8c\u3001\u6613\u4e8e\u8c03\u8bd5\u3001\u7ed1\u5b9a\u53cb\u597d<\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n
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\u2705 \u6848\u4f8b\uff1a\u7ed3\u5408\u63a5\u53e3\u5b9e\u73b0\u53ea\u8bfb\u66b4\u9732<\/h3>\n\n\n\n
public interface IUser\n{\n    string Username { get; }\n}\n\npublic class User : IUser\n{\n    public string Username { get; private set; }\n}<\/code><\/pre>\n\n\n\n
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\u516b\u3001\u6743\u5a01\u53c2\u8003\u94fe\u63a5<\/h2>\n\n\n\n