调用通用方法而不显式指定类型参数

Question

My controller-base has the following handler:

protected ActionResult HandleRequest<TRequest, TResponse, TViewModel>(Func<TRequest, TResponse> function, TRequest request)
    where TRequest : BaseRequest
    where TResponse : BaseResponse<TViewModel> 
    where TViewModel : BaseViewModel
{
    var viewData = function(request);

    return View(viewData);
}

Which is currently called like

return HandleRequest<HomeIndexGetRequest, HomeIndexGetResponse, HomeIndexGetViewModel>(GetData, request);

in my controller. The GetData-method looks like

private static HomeIndexGetResponse GetData(HomeIndexGetRequest request)
{
    return new HomeIndexGetResponse
        {
            ViewModel = new HomeIndexGetViewModel()
        };
}

The HomeIndexGetResponse signature is

public class HomeIndexGetResponse : BaseResponse<HomeIndexGetViewModel> 

And BaseResponse is setup like

public abstract class BaseResponse<TViewModel> where TViewModel : BaseViewModel

Question: Is there any chance that I can call the HandleRequest without specifying the type-arguments explicitly?

return HandleRequest(GetData, request);

Answer 1

Playing around a bit I came up with the following solution which works as I need it.

New non-generic base class

public abstract class BaseResponse

Changed the BaseResponse to

public abstract class BaseResponse<TViewModel> : BaseResponse where TViewModel : BaseViewModel

The handler changed to

protected ActionResult HandleRequest<TRequest, TResponse>(Func<TRequest, TResponse> function, TRequest request)
    where TRequest : BaseRequest
    where TResponse : BaseResponse 
{
    var viewData = function(request);

    return View(viewData);
}

without the TViewModel type-argument.

Finally, the controller looks like this

return HandleRequest(GetData, request);

In the action, and the GetData is implemented

private static BaseResponse GetData(HomeIndexGetRequest request)
{
    return new HomeIndexGetResponse
        {
            ViewModel = new HomeIndexGetViewModel()
        };
}