{"id":3594,"date":"2025-04-20T18:56:54","date_gmt":"2025-04-20T10:56:54","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3594"},"modified":"2025-04-20T18:56:54","modified_gmt":"2025-04-20T10:56:54","slug":"c-%e6%b3%9b%e5%9e%8b%e6%8b%93%e5%b1%95%e5%86%85%e5%ae%b9","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/04\/20\/c-%e6%b3%9b%e5%9e%8b%e6%8b%93%e5%b1%95%e5%86%85%e5%ae%b9\/","title":{"rendered":"C# \u6cdb\u578b\u62d3\u5c55\u5185\u5bb9"},"content":{"rendered":"\n

\u57fa\u4e8e\u4e0a\u7bc7\u8bb2\u5230\u7684C# \u6cdb\u578b\uff08Generics\uff09\uff0c\u672c\u7bc7\u91cd\u70b9\u9488\u5bf9\u5982\u4e0b4\u4e2a\u5185\u5bb9\u505a\u62d3\u5c55\u8bb2\u89e3\u3002<\/p>\n\n\n\n

\u2705 \u5404\u79cd\u6cdb\u578b\u8bbe\u8ba1\u6a21\u5f0f\u6a21\u677f\u4ee3\u7801
\u2705 \u6cdb\u578b + \u53cd\u5c04\u6846\u67b6\u5b9e\u8df5\uff08\u6bd4\u5982 IOC \u5bb9\u5668\uff09
\u2705 \u6cdb\u578b\u59d4\u6258\u51fd\u6570\u5f0f\u98ce\u683c\u7f16\u7a0b\u793a\u4f8b
\u2705 \u6cdb\u578b\u7c7b\u548c\u6cdb\u578b\u65b9\u6cd5\u8bbe\u8ba1\u7684\u6027\u80fd\u5bf9\u6bd4<\/p>\n\n\n\n

\n\n\n\n

\u2705 1. \u5404\u79cd\u6cdb\u578b\u8bbe\u8ba1\u6a21\u5f0f\u6a21\u677f\u4ee3\u7801<\/h2>\n\n\n\n
\n\n\n\n

1.1 \u6cdb\u578b\u5355\u4f8b\u6a21\u5f0f\uff08Generic Singleton\uff09<\/h3>\n\n\n\n
public sealed class Singleton<T> where T : class, new()\n{\n    private static readonly Lazy<T> instance = new(() => new T());\n\n    public static T Instance => instance.Value;\n}<\/code><\/pre>\n\n\n\n
\u4f7f\u7528\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
var logger = Singleton<Logger>.Instance;<\/code><\/pre>\n\n\n\n
\n\n\n\n
1.2 \u6cdb\u578b\u4ed3\u50a8\u6a21\u5f0f\uff08Generic Repository Pattern\uff09<\/h3>\n\n\n\n
public interface IRepository<T> where T : class\n{\n    void Add(T entity);\n    T GetById(int id);\n    IEnumerable<T> GetAll();\n}\n\npublic class InMemoryRepository<T> : IRepository<T> where T : class\n{\n    private readonly List<T> _store = new();\n\n    public void Add(T entity) => _store.Add(entity);\n    public T GetById(int id) => _store.ElementAtOrDefault(id);\n    public IEnumerable<T> GetAll() => _store;\n}<\/code><\/pre>\n\n\n\n
\n\n\n\n
1.3 \u6cdb\u578b\u5de5\u5382\u6a21\u5f0f\uff08Generic Factory\uff09<\/h3>\n\n\n\n
public class Factory<T> where T : new()\n{\n    public T Create() => new T();\n}<\/code><\/pre>\n\n\n\n
\n\n\n\n
1.4 \u6cdb\u578b\u670d\u52a1\u5b9a\u4f4d\u5668\u6a21\u5f0f\uff08Service Locator\uff09<\/h3>\n\n\n\n
public class ServiceLocator\n{\n    private static readonly Dictionary<Type, object> services = new();\n\n    public static void Register<T>(T instance) => services[typeof(T)] = instance;\n    public static T Resolve<T>() => (T)services[typeof(T)];\n}<\/code><\/pre>\n\n\n\n
\n\n\n\n
2. \u6cdb\u578b + \u53cd\u5c04\u6846\u67b6\u5b9e\u8df5\uff08IOC \u5bb9\u5668\uff09<\/h2>\n\n\n\n
\n\n\n\n
\u7b80\u5355 IoC \u5bb9\u5668\u793a\u4f8b\uff08\u5e26\u6cdb\u578b & \u53cd\u5c04\uff09<\/h3>\n\n\n\n
public interface IService { void Run(); }\npublic class MyService : IService { public void Run() => Console.WriteLine(\"Service Running\"); }\n\npublic class SimpleContainer\n{\n    private readonly Dictionary<Type, Type> _types = new();\n\n    public void Register<TInterface, TImplementation>() where TImplementation : TInterface\n    {\n        _types[typeof(TInterface)] = typeof(TImplementation);\n    }\n\n    public TInterface Resolve<TInterface>()\n    {\n        var type = _types[typeof(TInterface)];\n        return (TInterface)Activator.CreateInstance(type);\n    }\n}<\/code><\/pre>\n\n\n\n
\u4f7f\u7528\uff1a<\/p>\n\n\n\n
var container = new SimpleContainer();\ncontainer.Register<IService, MyService>();\n\nvar service = container.Resolve<IService>();\nservice.Run(); \/\/ \u8f93\u51fa\uff1aService Running<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u662f\u4e00\u4e2a \u652f\u6301\u6cdb\u578b\u3001\u53cd\u5c04\u3001\u81ea\u52a8\u5b9e\u4f8b\u5316\u7684 IoC \u6846\u67b6\u96cf\u5f62<\/strong>\u3002<\/p>\n\n\n\n
\n\n\n\n
3. \u6cdb\u578b\u59d4\u6258\u51fd\u6570\u5f0f\u98ce\u683c\u7f16\u7a0b\u793a\u4f8b<\/h2>\n\n\n\n
\n\n\n\n
3.1 \u6cdb\u578b\u65b9\u6cd5 + Func \u5b9e\u73b0 Map \u51fd\u6570<\/h3>\n\n\n\n
public static class EnumerableExtensions\n{\n    public static IEnumerable<TResult> Map<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, TResult> selector)\n    {\n        foreach (var item in source)\n            yield return selector(item);\n    }\n}<\/code><\/pre>\n\n\n\n
\u4f7f\u7528\uff1a<\/p>\n\n\n\n
var nums = new List<int> { 1, 2, 3 };\nvar squares = nums.Map(n => n * n); \/\/ 1, 4, 9<\/code><\/pre>\n\n\n\n
\n\n\n\n
3.2 \u6cdb\u578b\u59d4\u6258\u5b9a\u4e49<\/h3>\n\n\n\n
public delegate TResult Transformer<TSource, TResult>(TSource input);\n\nTransformer<int, string> intToStr = x => $\"Num:{x}\";<\/code><\/pre>\n\n\n\n
\n\n\n\n
3.3 \u7ed3\u5408 LINQ \u98ce\u683c\u6cdb\u578b<\/h3>\n\n\n\n
Func<int, bool> isEven = x => x % 2 == 0;\nvar result = Enumerable.Range(1, 10).Where(isEven);<\/code><\/pre>\n\n\n\n
\n\n\n\n
4. \u6cdb\u578b\u7c7b vs \u6cdb\u578b\u65b9\u6cd5\u6027\u80fd\u5bf9\u6bd4<\/h2>\n\n\n\n
\n\n\n\n
\u6d4b\u8bd5\u573a\u666f\u8bf4\u660e\uff1a<\/h3>\n\n\n\n
\u5bf9\u6bd4\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u5728\u6267\u884c\u5927\u91cf\u6570\u636e\u64cd\u4f5c\u65f6\u7684\u6027\u80fd\u5dee\u5f02\uff1a<\/p>\n\n\n\n
    \n
  • \u6cdb\u578b\u65b9\u6cd5<\/strong>\uff1a\u4ec5\u65b9\u6cd5\u4e3a\u6cdb\u578b<\/li>\n\n\n\n
  • \u6cdb\u578b\u7c7b<\/strong>\uff1a\u7c7b\u4e3a\u6cdb\u578b\uff0c\u65b9\u6cd5\u4e3a\u5e38\u89c4\u65b9\u6cd5<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    \u6cdb\u578b\u65b9\u6cd5<\/h4>\n\n\n\n
    public class Calculator\n{\n    public T Add<T>(T a, T b) where T : INumber<T>\n    {\n        return a + b;\n    }\n}<\/code><\/pre>\n\n\n\n
    \u4f7f\u7528\uff1a<\/p>\n\n\n\n
    var calc = new Calculator();\nint sum = calc.Add(10, 20);<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    \u6cdb\u578b\u7c7b<\/h4>\n\n\n\n
    public class Calculator<T> where T : INumber<T>\n{\n    public T Add(T a, T b) => a + b;\n}<\/code><\/pre>\n\n\n\n
    \u4f7f\u7528\uff1a<\/p>\n\n\n\n
    var intCalc = new Calculator<int>();\nint result = intCalc.Add(10, 20);<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    \u6027\u80fd\u7ed3\u8bba\uff08\u57fa\u4e8e BenchmarkDotNet \u6d4b\u8bd5\uff09\uff1a<\/h3>\n\n\n\n
      \n
    • \u5982\u679c\u9891\u7e41\u8c03\u7528\uff1a\u6cdb\u578b\u7c7b<\/strong>\u7a0d\u5feb\uff08\u7f16\u8bd1\u5668\u4f18\u5316\u5f97\u66f4\u5f7b\u5e95\uff09<\/li>\n\n\n\n
    • \u5982\u679c\u8c03\u7528\u5206\u6563\uff0c\u7c7b\u578b\u591a\u6837\uff1a\u6cdb\u578b\u65b9\u6cd5<\/strong>\u66f4\u7075\u6d3b\u3001\u5360\u7528\u66f4\u5c11\u5185\u5b58<\/li>\n<\/ul>\n\n\n\n
      \ud83d\udcd8 \u63a8\u8350\u9605\u8bfb BenchmarkDotNet \u4f7f\u7528\uff1a
      https:\/\/benchmarkdotnet.org\/<\/p>\n\n\n\n
      \n\n\n\n
      \u5ef6\u4f38\u9605\u8bfb\u4e0e\u6e90\u7801\u53c2\u8003<\/h2>\n\n\n\n
        \n
      • \ud83e\udde9 \u6cdb\u578b\u8bbe\u8ba1\u6a21\u5f0f\u5b9e\u6218\uff08C#\uff09
        https:\/\/refactoring.guru\/design-patterns\/csharp<\/li>\n\n\n\n
      • \ud83e\udde9 BenchmarkDotNet\uff08\u6027\u80fd\u6d4b\u8bd5\u5de5\u5177\uff09
        https:\/\/github.com\/dotnet\/BenchmarkDotNet<\/li>\n\n\n\n
      • \ud83e\udde9 .NET \u6e90\u7801\u5206\u6790\uff08\u6cdb\u578b\u5bb9\u5668\uff09
        https:\/\/github.com\/dotnet\/runtime<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        \u4e0b\u7bc7\u6587\u7ae0\u5c06\u9488\u5bf9\u5bf9\u8be5\u90e8\u5206\u6253\u5305\u6210\u9879\u76ee\u7ed3\u6784\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u5728 Visual Studio \u4e2d\u8fd0\u884c\u8c03\u8bd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u57fa\u4e8e\u4e0a\u7bc7\u8bb2\u5230\u7684C# \u6cdb\u578b\uff08Generics\uff09\uff0c\u672c\u7bc7\u91cd\u70b9\u9488\u5bf9\u5982\u4e0b4\u4e2a\u5185\u5bb9\u505a\u62d3\u5c55\u8bb2\u89e3\u3002 \u2705 \u5404\u79cd\u6cdb\u578b\u8bbe\u8ba1\u6a21\u5f0f\u6a21\u677f\u4ee3 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[],"class_list":["post-3594","post","type-post","status-publish","format-standard","hentry","category-c-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3594","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3594"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3594\/revisions"}],"predecessor-version":[{"id":3595,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3594\/revisions\/3595"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}