.NET8/.NETCore 依赖接口注入：自动注入项目中所有接口和自定义类

目录

• 自定义依赖接口
• 扩展类：HostExtensions AddInjectionServices方法
• GlobalAssemblies 全局静态类
• 测试

自定义依赖接口

需要依赖注入的类必须实现以下接口。

C#

    /// <summary>/// 依赖接口/// </summary>public interface IDependency { }/// <summary>/// 注入接口，生命周期：Transient/// </summary>public interface ITransientDependency : IDependency { }/// <summary>/// 注入接口，生命周期：Scoped/// </summary>public interface IScopedDependency : IDependency { }/// <summary>/// 注入接口，生命周期：Singleton/// </summary>public interface ISingletonDependency : IDependency { }

扩展类：HostExtensions AddInjectionServices方法

C#

 public static class HostExtensions{/// <summary>/// 自动注入接口, 注入到服务容器IServiceCollection/// </summary>/// <param name="services"></param>/// <returns></returns>public static IServiceCollection AddInjectionServices(this IServiceCollection services){//服务生命周期映射Dictionary<Type, ServiceLifetime> map = new Dictionary<Type, ServiceLifetime>{{ typeof(ITransientDependency),ServiceLifetime.Transient },{ typeof(IScopedDependency),ServiceLifetime.Scoped },{ typeof(ISingletonDependency),ServiceLifetime.Singleton },{ typeof(IDependency),ServiceLifetime.Scoped },};//获取程序集所有实体模型Typevar listTypes = GlobalAssemblies.GetTypes();foreach (var type in listTypes){map.ToList().ForEach(aMap =>{//依赖注入接口var interfaceDependency = aMap.Key;if (interfaceDependency.IsAssignableFrom(type) && interfaceDependency != type && !type.IsAbstract && type.IsClass){//注入实现Console.WriteLine("注入实现：" + type.FullName + ", " + aMap.Value.ToString());                        services.Add(new ServiceDescriptor(type, type, aMap.Value));//获取当前类的所有接口var interfaces = listTypes.Where(x => x.IsInterface && x.IsAssignableFrom(type) && x != interfaceDependency).ToList();//有接口，注入接口if (interfaces.Count > 0){interfaces.ForEach(@inteface =>{Console.WriteLine("注入接口：" + type.FullName + "," + @inteface.FullName + ", " + aMap.Value.ToString());services.Add(new ServiceDescriptor(@inteface, type, aMap.Value));});}}});};return services;}}

GlobalAssemblies 全局静态类

加载程序集Assembly。

作用：

• 用于初始化CSFramework.EF组件（注册实体模型）
• 用于获取所有接口和类，依赖注入服务

C#

    public static class GlobalAssemblies{/// <summary>/// 加载程序集Assembly。/// 作用：1.用于初始化CSFramework.EF组件（注册实体模型）///      2.用于获取所有接口和类，依赖注入服务/// </summary>/// <param name="hostBuilder"></param>/// <returns></returns>public static void LoadAssemblies(){//加载以下程序集(包含所有实体模型、自定义服务的程序集)GlobalAssemblies.Assemblies = new List<System.Reflection.Assembly>{//如：CSFramework.LicenseServerCore.dllSystem.Reflection.Assembly.Load("CSFramework.LicenseServerCore"),System.Reflection.Assembly.Load("CSFramework.Models"),};}/// <summary>/// WebApi框架所有程序集/// </summary>public static List<System.Reflection.Assembly> Assemblies { get; set; }/// <summary>/// WebApi框架所有类型Types/// </summary>public static List<System.Type> GetTypes(){return Assemblies.SelectMany(m => m.GetExportedTypes()).ToList();}}

测试