CODEWITHSUNDEEP
c#genericsgeneric-method
flamaniac
flamaniac

Reputation: 46

Generic method with generic parameter

I want to create generic method with generic parameter like that:

public class BaseResponse<T>
{
    public ResponseReturnCode Code { get; set; }
    public string Description { get; set; }
    public T Data { get; set; }
}

public class LoginResponse : BaseResponse<LoginData> 

 private async Task<T> CreateResponse<T,U>(HttpResponseMessage responseMessage) where T : BaseResponse<U>
        {    
            var responseBody = await responseMessage.Content.ReadAsStringAsync();
               
            var responseDto = JsonConvert.DeserializeObject<T>(responseBody);
            // Some additional stuff here but I am not need U type for that.
            // I am only touching not generic part of BaseResponse here.
            //...
            return responseDto;
        }

This is working:

var responseDto = await CreateResponse<LoginResponse, LoginData>(responseMessage);

private async Task<T> CreateResponse<T,U>(HttpResponseMessage responseMessage) where T : BaseResponse<U> {...}

I don't want to specify internal type "LoginData" when calling this method. But this statment dosn't work:

var responseDto = await CreateResponse<LoginResponse>(responseMessage);
private async Task<T> CreateResponse<T>(HttpResponseMessage responseMessage) where T : BaseResponse<U> where U : class
{...}

"U" type i unknown...

this also doesn't work:

var responseDto = await CreateResponse<LoginResponse>(responseMessage);

private async Task<T> CreateResponse<T>(HttpResponseMessage responseMessage) where T : BaseResponse<object>
{...}

In Java i can use wildcard but hot to solve this i c#?

Upvotes: 0

Views: 383

Answers (0)

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