asp.net core mvc中修改DefaultControllerFactory的CreateController方法中的ControllerContext

Question

我想覆盖我的控制器方法。在这里，如果请求到来，我已经将 DefaultControllerFactory 的 CreateController 方法覆盖为 return CatalogCustomController 对象对于 CatalogController。

但问题是我需要将所有依赖项传递给控制器构造函数。

 public class CustomControllerFactory: DefaultControllerFactory
{  
    public CustomControllerFactory(ICatalogModelFactory catalogModelFactory,
        IProductModelFactory productModelFactory,
        IControllerActivator controllerActivator, IEnumerable<IControllerPropertyActivator> propertyActivators)
        :base(controllerActivator, propertyActivators)
    {
        this._catalogModelFactory = catalogModelFactory;
        this._productModelFactory = productModelFactory;
    }
    public override object CreateController(ControllerContext context)
    {
        if (context.ActionDescriptor.ControllerTypeInfo.AsType() == typeof(CatalogController))
        {
            return new CatalogCustomController(_catalogModelFactory,
            _productModelFactory,
            _categoryService, 
        }

        return base.CreateController(context);
    }
}

虽然我想做这样的事情，通过修改 ControllerContext上下文

 public override object CreateController(ControllerContext context)
    {
        if (context.ActionDescriptor.ControllerTypeInfo.AsType() == typeof(CatalogController))
        {

            context.ActionDescriptor.ControllerName = "CatalogCustomController";   
        }

        return base.CreateController(context);
    }

Answer 1

您可以尝试将 Controller 注册到 IServiceCollection，然后从 CreateController 中的 IServiceCollection 检索 Controller。

AddControllersAsServices

的扩展方法

public static class Extension
{
public static IMvcBuilder AddControllersAsServices(this IMvcBuilder builder)
{
    var feature = new ControllerFeature();
    builder.PartManager.PopulateFeature(feature);

    foreach (var controller in feature.Controllers.Select(c => c.AsType()))
    {
        builder.Services.TryAddTransient(controller, controller);
    }

    builder.Services.Replace(ServiceDescriptor.Transient<IControllerActivator, ServiceBasedControllerActivator>());

    return builder;
}
}

注册服务

    services.AddMvc()
        .AddControllersAsServices();

CustomControllerFactory

 public class CustomControllerFactory : DefaultControllerFactory
 {
public CustomControllerFactory(
    IControllerActivator controllerActivator, IEnumerable<IControllerPropertyActivator> propertyActivators)
    : base(controllerActivator, propertyActivators)
{
}
public override object CreateController(ControllerContext context)
{
    if (context.ActionDescriptor.ControllerTypeInfo.AsType() == typeof(CatalogController))
    {               
        return context.HttpContext.RequestServices.GetRequiredService(typeof(CatalogCustomController));
    }

    return base.CreateController(context);
}
}

Answer 2

我找到了一个解决方案，无需将控制器注册为服务。

从主控制器继承自定义控制器。
在自定义控制器工厂中，获取请求的控制器类型。
将 ControllerTypeInfo 替换为自定义的

public override object CreateController(ControllerContext context)
    {
        Type typeOfController = context.ActionDescriptor.ControllerTypeInfo.UnderlyingSystemType;

    if (typeOfController == typeof(Nop.Web.Controllers.CatalogController))
    {
        context.ActionDescriptor.ControllerTypeInfo = typeof(Controllers.CatalogCustomController).GetTypeInfo();
    }
    else if (typeOfController == typeof(Nop.Web.Areas.Admin.Controllers.ProductController))
    {
        context.ActionDescriptor.ControllerTypeInfo = typeof(Areas.Admin.Controllers.ProductCustomController).GetTypeInfo();
    }
    return base.CreateController(context);  
}<pre>

asp.net core mvc中修改DefaultControllerFactory的CreateController方法中的ControllerContext

Modify ControllerContext in CreateController method of DefaultControllerFactory in asp.net core mvc

asp.net-core-mvc

controller-factory