Asp.net core mvc 修改asp.net核心mvc中DefaultControllerFactory的CreateController方法中的ControllerContext 我想重写我的控制器方法。这里我重写了DefaultControllerFactory的CreateController方法，以便在请求CatalogController时返回CatalogCustomController对象

但这里的问题是，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);
    }
}

---

您可以尝试将

Controller

注册到

IServiceCollection

，然后在

CreateController

中从

IServiceCollection

检索

Controller

addControllerAsservices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;
}
}

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);
}
}

公共类CustomControllerFactory:DefaultControllerFactory
{
公共客户控制器工厂(
i控制器激活器控制器激活器，i可数属性激活器）
：基本（控制器激活器、属性激活器）
{
}
公共重写对象CreateController（ControllerContext上下文）
{
if（context.ActionDescriptor.ControllerTypeInfo.AsType（）==typeof（CatalogController））
{               
返回context.HttpContext.RequestServices.GetRequiredService（typeof（CatalogCustomController））；
}
返回base.CreateController（上下文）；
}
}

---

我找到了一个解决方案，不用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，获取所请求控制器的类型
• 用自定义的ControllerTypeInfo替换ControllerTypeInfo

公共重写对象CreateController（ControllerContext上下文） { 类型typeOfController=context.ActionDescriptor.ControllerTypeInfo.UnderlineingSystemType

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（）；
}
返回base.CreateController（上下文）；
}

感谢您的解决方案，它本应完美工作。

    services.AddMvc()
        .AddControllersAsServices();

 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);
}
}

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>