手撸IOC
2021/11/19 6:10:56
本文主要是介绍手撸IOC,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
Console.WriteLine("Hello, World!"); MyIocContainer services = new MyIocContainer(); services.AddTransient<ITestService, TestService>(); services.AddTransient<IMyService, MyService>(); var myService = services.GetService<IMyService>(); public class MyIocContainer { Dictionary<Type, Type> _container = new(); public void AddTransient<TInterface, TImplement>() { if (_container.ContainsKey(typeof(TInterface))) { _container.Remove(typeof(TInterface)); } _container.Add(typeof(TInterface), typeof(TImplement)); } public T GetService<T>() { return (T)GetService(typeof(T), _container); } private static object GetService(Type interfaceType, Dictionary<Type, Type> container) { if (!container.ContainsKey(interfaceType)) { throw new Exception($"there is no implement type of {interfaceType.Name}"); } var implementType = container[interfaceType]; var ctors = implementType.GetConstructors(); var constructor = ctors.OrderByDescending(x => x.GetParameters().Count()).FirstOrDefault(); if (constructor is null) { throw new ArgumentNullException(nameof(constructor)); } var ctorParameters = constructor.GetParameters(); List<object> parameterList = new(); foreach (var p in ctorParameters) { var parameterInterfaceType = p.ParameterType; parameterList.Add(GetService(parameterInterfaceType, container)); } return constructor.Invoke(parameterList.ToArray()); } } public interface IMyService { } public class MyService : IMyService { public MyService(ITestService testService) { } } public interface ITestService { } public class TestService : ITestService { }
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