71 lines
2.9 KiB
C#
71 lines
2.9 KiB
C#
using System.Reflection;
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namespace langguanApi.Extensions.AutoDI
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{
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/// <summary>
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/// 自动注入
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/// </summary>
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public static class AutoDIExtensions
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{
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/// <summary>
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///
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/// </summary>
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/// <param name="serviceCollection"></param>
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/// <returns></returns>
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public static IServiceCollection ServicesAutoInjectionExtension(this IServiceCollection serviceCollection)
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{
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var directory = AppDomain.CurrentDomain.BaseDirectory;
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var types = Directory.GetFiles(directory, "*.dll", SearchOption.TopDirectoryOnly)
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.Select(Assembly.LoadFrom)
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.SelectMany(a => a.GetTypes());
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Injection(serviceCollection, types);
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return serviceCollection;
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}
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/// <summary>
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/// 服务自动注入
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/// </summary>
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/// <param name="serviceCollection">需要自动注入服务的服务集合</param>
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/// <param name="selector">应用于每个Assembly的筛选函数</param>
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/// <exception cref="ArgumentOutOfRangeException">指定的注入类型不在可注入的范围内</exception>
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/// <exception cref="NoImplementationInterfaceException">指定注入的类型未实现任何服务</exception>
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/// <exception cref="ArgumentException">输入的参数错误：1、注入的类型未实现指定的服务。2、指定的服务不是Interface类型</exception>
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/// <returns>自动注入服务后的服务集合</returns>
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public static IServiceCollection ServicesAutoInjection(this IServiceCollection serviceCollection, Func<Assembly, bool> selector)
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{
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var directory = AppDomain.CurrentDomain.BaseDirectory;
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var types = Directory.GetFiles(directory, "*.dll", SearchOption.TopDirectoryOnly)
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.Select(Assembly.LoadFrom)
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.Where(selector)
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.SelectMany(a => a.GetTypes());
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Injection(serviceCollection, types);
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return serviceCollection;
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}
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// 注入逻辑
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private static void Injection(IServiceCollection serviceCollection, IEnumerable<Type> types)
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{
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foreach (var type in types)
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{
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var attribute = type.GetCustomAttribute<ServiceInjectionAttribute>();
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if (attribute == null) continue;
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switch (attribute.InjectionType)
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{
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case InjectionType.Transient:
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serviceCollection.AddTransient(type);
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break;
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case InjectionType.Scoped:
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serviceCollection.AddScoped(type);
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break;
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case InjectionType.Singleton:
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serviceCollection.AddSingleton(type);
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break;
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default:
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throw new ArgumentOutOfRangeException();
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}
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}
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}
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}
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}
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