ASP 具有 System.Web.Http API 控制器的 WebForms - 控制器中的构造函数依赖注入不起作用

Question

我正在处理旧版 ASP.NET WebForms 系统，必须实施依赖注入。我已经使用 Microsoft.Extensions.DependencyInjection 和自定义 ServiceProvider 为页面类设置了 DI，效果很好。

服务提供商

public class ServiceProvider : IServiceProvider
{
    private readonly IServiceProvider _serviceProvider;

    public ServiceProvider(IServiceProvider serviceProvider)
    {
        _serviceProvider = serviceProvider;
    }

    public object GetService(Type serviceType)
    {
        try
        {
            IServiceScope lifetimeScope;
            var currentHttpContext = HttpContext.Current;
            if (currentHttpContext != null)
            {
                lifetimeScope = (IServiceScope)currentHttpContext.Items[typeof(IServiceScope)];
                if (lifetimeScope == null)
                {
                    void CleanScope(object sender, EventArgs args)
                    {
                        if (sender is HttpApplication application)
                        {
                            application.RequestCompleted -= CleanScope;
                            lifetimeScope.Dispose();
                        }
                    }

                    lifetimeScope = _serviceProvider.CreateScope();
                    currentHttpContext.Items.Add(typeof(IServiceScope), lifetimeScope);
                    currentHttpContext.ApplicationInstance.RequestCompleted += CleanScope;
                }
            }
            else
            {
                lifetimeScope = _serviceProvider.CreateScope();
            }

            return ActivatorUtilities.GetServiceOrCreateInstance(lifetimeScope.ServiceProvider, serviceType);
        }
        catch (InvalidOperationException)
        {
            //No public ctor available, revert to a private/internal one
            return Activator.CreateInstance(serviceType, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.CreateInstance, null, null, null);
        }
    }
}

并在 Global.asax

IServiceCollection services = this.ConfigureServices(new ServiceCollection());
var provider = new Infrastructure.DI.ServiceProvider(services.BuildServiceProvider());
HttpRuntime.WebObjectActivator = provider;

在这个应用程序的客户端有一段 JS 必须通过 ajax 调用服务器。由于此遗留应用程序的设计，无法在相应的 .aspx 页面上调用 [WebMethod]，因此引入了 System.Web.Http API 控制器来处理此调用。我希望通过在 Global.asax 中像这样设置 DI，我可以在控制器构造函数中注入我需要的服务，但这不起作用并且 ControllerContext returns 是一个空的 HttpConfiguration。如何使用我当前的 DI 并将其提供给我的控制器？

Answer 1

// This fixes controllers injection.
GlobalConfiguration.Configuration.DependencyResolver = new MyDependencyResolver();

ASP 具有 System.Web.Http API 控制器的 WebForms - 控制器中的构造函数依赖注入不起作用

ASP WebForms with System.Web.Http API Controllers- Constructor dependency Injection in controllers not working

.net

dependency-injection

webforms