NetCore6.0 使用微软自带依赖注入

依赖注入工厂方法 

 /// <summary>
        /// 注册依赖注入
        /// </summary>
        /// <param name="serviceCollection"></param>
        /// <returns></returns>
        public static IServiceCollection AddDIRegister(this IServiceCollection serviceCollection)
        {
            //反射服务类 当前程序集依赖注入
            var services = Assembly.GetAssembly(typeof(CaseService)).GetTypes().Where(a => a.Name.EndsWith("Service") && a.IsAnsiClass && !a.IsAbstract);
            foreach (var serviceItem in services)
            {
                //通过服务类匹配接口类
                var iServiceItem = serviceItem.GetInterfaces().FirstOrDefault(w => w.Name == $"I{serviceItem.Name}");
                serviceCollection.AddSingleton(iServiceItem, serviceItem);
            }

            //跨程序集依赖注入（方法1）  程序集名称 "Tellyes.Unicorn.CaseService" .dll省略
            var servicesUnicorn = Assembly.Load("Tellyes.Unicorn.CaseService").GetTypes().Where(w => w.Name.Contains("Service"));

            foreach (var serviceItemUnicorn in servicesUnicorn)
            {
                //通过服务类匹配接口类
                var iServiceItemUnicorn = serviceItemUnicorn.GetInterfaces().FirstOrDefault(w => w.Name == $"I{serviceItemUnicorn.Name}");
                if (iServiceItemUnicorn != null && serviceItemUnicorn != null)
                    serviceCollection.AddSingleton(iServiceItemUnicorn, serviceItemUnicorn);
            }
            //通过xml配置进行跨程序集依赖注入（方法2） 逗号前面命名空间，逗号后面程序集命名空间
            //var iType = Type.GetType("Tellyes.Unicorn.IBGEService,Tellyes.Unicorn.ICaseService");
            //var pType = Type.GetType("Tellyes.Unicorn.BGEService,Tellyes.Unicorn.CaseService");
            //if (iType != null && pType != null)
            //    serviceCollection.AddSingleton(iType, pType);

            return serviceCollection;
        }

通过xml配置需设置程序集属性节点

  <PropertyGroup> 重点红色部分
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
      <AssemblyName>Tellyes.Unicorn.CaseService</AssemblyName>
      <RootNamespace>Tellyes.Unicorn.CaseService</RootNamespace>
  </PropertyGroup>

 注意：构造函数内注入的一定是接口，而不是服务。

启动文件注册依赖注入

 var builder = WebApplication.CreateBuilder(args);

 builder.Services.AddDIRegister(); 

autofac ninject 这两个依赖注入组件也不错

参考地址：https://www.cnblogs.com/qingjiawen/p/16253732.html

                  https://blog.csdn.net/wulaihaoa/article/details/103932954

                  https://learn.microsoft.com/zh-cn/aspnet/core/fundamentals/dependency-injection?view=aspnetcore-7.0

                  https://www.cnblogs.com/jianghaidong/p/13415124.html