.NET Core - 更改控制器中的依赖关系

我正在开发一个 Web 应用程序（.net core 2.2）并尝试替换控制器中对查询字符串参数的现有依赖项。我知道，可以替换 Startup.cs 中的依赖项（ConfigureServices（IServiceCollection services）方法）。但问题是我无法访问控制器中的“IServiceCollection”。你们知道如何实现它吗？

这就是在Startup中替换依赖的方法。 “ServiceCollectionDescriptorExtensions”具有“替换”方法。

services.Replace(ServiceDescriptor.Scoped<IFooService,AnotherVersionOfFooService>());

https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.extensions.servicecollectiondescriptorextensions?view=dotnet-plat-ext-3.1#Microsoft_Extensions_DependencyInjection_Extensions_ServiceCollectionDescriptorExtensions https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.extensions.servicecollectiondescriptorextensions?view=dotnet-plat-ext-3.1#Microsoft_Extensions_DependencyInjection_Extensions_ServiceCollectionDescriptorExtensions

Thanks

像这样的东西...

公开课服务集合 {

    public IConfiguration Configuration { get; }
    public IServiceCollection Services { get; }
    public ServicesCollections()
    {
    }
    public ServicesCollections(IConfiguration configuration, IServiceCollection services)
    {
        Configuration = configuration;
        Services = services;
    }


}


/// <summary> Generic singleton with double check pattern and with instance parameter </summary>
/// <typeparam name="T"></typeparam>
public class SingleObject<T> where T : class, new()
{
    /// <summary> Lock object </summary>
    private static readonly object _lockingObject = new object();

    /// <summary> Instance </summary>
    private static T _singleObject;

    /// <summary> ctor </summary>
    public SingleObject()
    {
    }

    /// <summary> Instance with parameter </summary>
    /// <param name="param">Parameters</param>
    /// <returns>Instance</returns>
    public static T Instance(params dynamic[] param)
    {
        if (_singleObject == null)
        {
            lock (_lockingObject)
            {
                if (_singleObject == null)
                {
                    _singleObject = (T)Activator.CreateInstance(typeof(T), param);
                }
            }
        }
        return _singleObject;
    }
}

在你的启动中——

公共无效ConfigureServices（IServiceCollection服务） { services.AddControllersWithViews();

        services.Configure<CookiePolicyOptions>(options =>
        {
            //This lambda determines whether user consent for non-essential cookies is needed for a given request.
            options.CheckConsentNeeded = context => true;
            options.MinimumSameSitePolicy = Microsoft.AspNetCore.Http.SameSiteMode.None;
        }
       );

        services.AddMvc().SetCompatibilityVersion(Microsoft.AspNetCore.Mvc.CompatibilityVersion.Latest);

        services.AddMvc()
            .AddControllersAsServices();

        JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();
        services.AddRazorPages();


       var configs = Interfaces.SingleObject<Interfaces.ServicesCollections>.Instance(Configuration, services);
        services.AddScoped<ServicesCollections>();
        services.AddTransient(ctx => new SSO.Gateway.Web.Controllers.LoginController(configs));

配置身份服务器（服务）；

    }

在你的控制器中——

public class YourController : Controller
{
    public YourController (ServicesCollections obj)
    {
        Configuration = obj.Configuration;
        Services = obj.Services;
        ConfigureServices();
    }

    public IConfiguration Configuration { get; }

    public IServiceCollection Services { get; }

    public void ConfigureServices()
    { 

    }