Calling a method with Generic signature and parameter

Question

I have the following signature which has a generic type and parameter as below:

List<T> GetMyList<T>(T filter);

The filter type is different from the list type. I am trying to call like this:

var myList = repo.GetMyList<List<items>>(filter);

I am not sure how to specify the type of 'filter' in the method call. Is this possible?

What do you mean? Whatever type you pass into your method will define it for the method, so you can just call repo.GetMyList(filter), and the T will be whatever type your filter parameter is. — krillgar
– krillgar, Commented Aug 18, 2017 at 13:32
You can't - the function takes in a filter of type T and returns a list of type T. There's no way around that. Maybe if you explained the problem in more detail a solution could be determined, but what you are asking is not possible with that signature. — D Stanley
– D Stanley, Commented Aug 18, 2017 at 13:32
Are you in control of List<T> GetMyList<T>(T filter);? Meaning can you change it's signature? — D Stanley
– D Stanley, Commented Aug 18, 2017 at 13:33

Student222 · Accepted Answer · 2017-08-18 13:32:59Z

2

If the types are different, you need to have 2 generic types, like below:

public List<T1> GetMyList<T1, T2>(T2 filter);

answered Aug 18, 2017 at 13:32

Student222

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1 Comment

Thanks. That worked and to call it I used var myList = repo.GetMyList<items, string>(filter);