{"id":3550,"date":"2025-04-19T09:52:57","date_gmt":"2025-04-19T01:52:57","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3550"},"modified":"2025-04-19T09:52:57","modified_gmt":"2025-04-19T01:52:57","slug":"c-%e7%9a%84%e5%8f%8d%e5%b0%84%ef%bc%88reflection%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/04\/19\/c-%e7%9a%84%e5%8f%8d%e5%b0%84%ef%bc%88reflection%ef%bc%89\/","title":{"rendered":"C# \u7684\u53cd\u5c04\uff08Reflection\uff09"},"content":{"rendered":"\n

\u4e86\u89e3 C# \u7684\u53cd\u5c04\uff08Reflection\uff09<\/strong>\uff0c\u8fd9\u662f\u4efb\u4f55 \u9ad8\u7ea7 .NET \u7f16\u7a0b\u3001\u6846\u67b6\u8bbe\u8ba1\u3001\u52a8\u6001\u5143\u6570\u636e\u8bbf\u95ee<\/strong> \u7684\u6838\u5fc3\u6280\u80fd\u4e4b\u4e00\u3002\u4ece\u4e00\u4e2a\u4e13\u4e1a\u5f00\u53d1\u5de5\u7a0b\u5e08\u89d2\u5ea6\u4e3a\u4f60\u5168\u9762\u8bb2\u89e3 C# \u53cd\u5c04\uff0c\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\n\n\n\n

\u4e00\u3001\u4ec0\u4e48\u662f\u53cd\u5c04\uff08Reflection\uff09<\/h3>\n\n\n\n

\u4e8c\u3001\u53cd\u5c04\u7684\u5e38\u7528\u573a\u666f<\/h3>\n\n\n\n

\u4e09\u3001\u6838\u5fc3 API \u4e0e\u7528\u6cd5<\/h3>\n\n\n\n

\u56db\u3001\u53cd\u5c04\u64cd\u4f5c\uff1a\u7c7b\u578b\u3001\u6210\u5458\u3001\u5b9e\u4f8b\u3001\u8c03\u7528<\/h3>\n\n\n\n

\u4e94\u3001\u5b9e\u6218\u6848\u4f8b<\/h3>\n\n\n\n

\u516d\u3001\u6027\u80fd\u95ee\u9898\u4e0e\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/h3>\n\n\n\n

\u4e03\u3001\u6743\u5a01\u53c2\u8003\u8d44\u6599<\/h3>\n\n\n\n
\n\n\n\n

\u4e00\u3001\u4ec0\u4e48\u662f\u53cd\u5c04\uff08Reflection\uff09<\/h2>\n\n\n\n
\n

\u53cd\u5c04\u662f\u4e00\u79cd\u5728\u8fd0\u884c\u65f6<\/strong>\u52a8\u6001\u83b7\u53d6\u7c7b\u578b\u4fe1\u606f\u3001\u521b\u5efa\u5bf9\u8c61\u3001\u8bbf\u95ee\u6210\u5458\uff08\u5c5e\u6027\u3001\u5b57\u6bb5\u3001\u65b9\u6cd5\uff09\u6216\u8c03\u7528\u65b9\u6cd5\u7684\u673a\u5236\u3002<\/p>\n<\/blockquote>\n\n\n\n

C# \u4e2d\uff0c\u53cd\u5c04\u4e3b\u8981\u7531 System.Reflection<\/code> \u547d\u540d\u7a7a\u95f4\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n\n\n\n

\u7b80\u800c\u8a00\u4e4b\uff0c\u5b83\u5141\u8bb8\u4f60\u5199\u51fa\u201c\u52a8\u6001\u5206\u6790\u7c7b\u578b<\/strong>\u201d\u3001\u201c\u8fd0\u884c\u65f6\u8c03\u7528\u65b9\u6cd5<\/strong>\u201d\u3001\u201c\u7f16\u5199\u6846\u67b6\u6216\u901a\u7528\u7ec4\u4ef6<\/strong>\u201d\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n

\n\n\n\n

\u4e8c\u3001\u53cd\u5c04\u7684\u5e38\u7528\u573a\u666f<\/h2>\n\n\n\n
\u573a\u666f<\/th>\u793a\u4f8b<\/th><\/tr><\/thead>
\u63d2\u4ef6\u673a\u5236<\/td>\u52a0\u8f7d DLL\uff0c\u8bc6\u522b\u7c7b\u548c\u65b9\u6cd5\u5e76\u8c03\u7528<\/td><\/tr>
ORM \u6846\u67b6<\/td>\u52a8\u6001\u8bfb\u53d6\u5b9e\u4f53\u7c7b\u5c5e\u6027\u751f\u6210 SQL<\/td><\/tr>
\u63a7\u5236\u53cd\u8f6c\uff08IoC\uff09<\/td>\u8fd0\u884c\u65f6\u5206\u6790\u6784\u9020\u51fd\u6570\u6ce8\u5165\u4f9d\u8d56<\/td><\/tr>
\u7279\u6027\u8bfb\u53d6<\/td>\u5982\u8bfb\u53d6 [Route]<\/code> \u7279\u6027\u5904\u7406\u8def\u7531<\/td><\/tr>
\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316<\/td>\u901a\u8fc7\u5c5e\u6027\u53cd\u5c04\u5b9e\u73b0 JSON\/XML \u6620\u5c04<\/td><\/tr>
\u5355\u5143\u6d4b\u8bd5\u6846\u67b6<\/td>\u67e5\u627e\u5e76\u6267\u884c\u6807\u8bb0\u4e86 [Test]<\/code> \u7684\u65b9\u6cd5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n

\u4e09\u3001\u6838\u5fc3 API \u4e0e\u7528\u6cd5<\/h2>\n\n\n\n
using System;\nusing System.Reflection;<\/code><\/pre>\n\n\n\n
\u5e38\u7528\u7c7b\u578b\uff1a<\/p>\n\n\n\n
\u7c7b\u578b<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
Type<\/code><\/td>\u7c7b\u578b\u4fe1\u606f\u7684\u5165\u53e3<\/td><\/tr>
PropertyInfo<\/code><\/td>\u8868\u793a\u5c5e\u6027<\/td><\/tr>
FieldInfo<\/code><\/td>\u8868\u793a\u5b57\u6bb5<\/td><\/tr>
MethodInfo<\/code><\/td>\u8868\u793a\u65b9\u6cd5<\/td><\/tr>
ConstructorInfo<\/code><\/td>\u6784\u9020\u51fd\u6570<\/td><\/tr>
Assembly<\/code><\/td>\u8868\u793a\u4e00\u4e2a\u7a0b\u5e8f\u96c6<\/td><\/tr>
Activator<\/code><\/td>\u521b\u5efa\u5bf9\u8c61<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n
\u56db\u3001\u53cd\u5c04\u64cd\u4f5c\u5927\u5168\uff08\u914d\u4ee3\u7801\uff09<\/h2>\n\n\n\n
1\ufe0f\u20e3 \u83b7\u53d6\u7c7b\u578b\u4fe1\u606f<\/h3>\n\n\n\n
Type t1 = typeof(string);\nType t2 = \"hello\".GetType();\nType t3 = Type.GetType(\"System.Int32\");<\/code><\/pre>\n\n\n\n
2\ufe0f\u20e3 \u83b7\u53d6\u7c7b\u7684\u6210\u5458<\/h3>\n\n\n\n
Type type = typeof(Person);\n\nvar props = type.GetProperties();     \/\/ \u6240\u6709\u516c\u5171\u5c5e\u6027\nvar fields = type.GetFields();        \/\/ \u6240\u6709\u516c\u5171\u5b57\u6bb5\nvar methods = type.GetMethods();      \/\/ \u6240\u6709\u516c\u5171\u65b9\u6cd5<\/code><\/pre>\n\n\n\n
3\ufe0f\u20e3 \u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b<\/h3>\n\n\n\n
Type type = typeof(Person);\nobject obj = Activator.CreateInstance(type);<\/code><\/pre>\n\n\n\n
4\ufe0f\u20e3 \u8bbf\u95ee\u5c5e\u6027\/\u5b57\u6bb5<\/h3>\n\n\n\n
var prop = type.GetProperty(\"Name\");\nprop.SetValue(obj, \"\u5c0f\u660e\");\n\nvar field = type.GetField(\"_age\", BindingFlags.NonPublic | BindingFlags.Instance);\nfield.SetValue(obj, 18);<\/code><\/pre>\n\n\n\n
5\ufe0f\u20e3 \u8c03\u7528\u65b9\u6cd5<\/h3>\n\n\n\n
var method = type.GetMethod(\"SayHello\");\nmethod.Invoke(obj, null); \/\/ \u53c2\u6570\u653e\u5728 object[] \u4e2d<\/code><\/pre>\n\n\n\n
6\ufe0f\u20e3 \u8bfb\u53d6 Attribute \u7279\u6027<\/h3>\n\n\n\n
var attr = prop.GetCustomAttribute(typeof(DisplayAttribute));<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u4e94\u3001\u5b9e\u6218\u6848\u4f8b<\/h2>\n\n\n\n
\u2705 \u6848\u4f8b\uff1a\u5b9e\u73b0\u4e00\u4e2a Mini \u4f9d\u8d56\u6ce8\u5165\u5bb9\u5668\uff08\u6784\u9020\u51fd\u6570\u6ce8\u5165\uff09<\/h3>\n\n\n\n
public class ServiceA { public void Do() => Console.WriteLine(\"A\"); }\npublic class ServiceB {\n    private readonly ServiceA _a;\n    public ServiceB(ServiceA a) { _a = a; }\n    public void Do() => _a.Do();\n}\n\n\/\/ \u53cd\u5c04\u5f0f\u5de5\u5382\npublic class Container {\n    public object Resolve(Type type)\n    {\n        var ctor = type.GetConstructors().First();\n        var parameters = ctor.GetParameters()\n            .Select(p => Resolve(p.ParameterType))\n            .ToArray();\n        return Activator.CreateInstance(type, parameters);\n    }\n}\n\n\/\/ \u4f7f\u7528\nvar container = new Container();\nvar b = (ServiceB)container.Resolve(typeof(ServiceB));\nb.Do(); \/\/ \u8f93\u51fa \"A\"<\/code><\/pre>\n\n\n\n
\u4f60\u53ef\u4ee5\u770b\u5230\uff1a\u53cd\u5c04\u8ba9\u6211\u4eec\u5728\u4e0d\u77e5\u9053\u7c7b\u578b\u7684\u524d\u63d0\u4e0b\uff0c\u52a8\u6001\u6784\u9020\u5bf9\u8c61\u5e76\u6ce8\u5165\u4f9d\u8d56\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u516d\u3001\u53cd\u5c04\u7684\u6027\u80fd\u548c\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n
\u6027\u80fd\u95ee\u9898<\/h3>\n\n\n\n