CODEWITHSUNDEEP
c#generics
Daniel B
Daniel B

Reputation: 3185

declaring a C# Generic Type method

I have a class:

internal class Paginated<T> where T : class
{
    public List<T> data { get; set; }

    public int total { get; set; }
    public int page { get; set; }
    public int per_page { get; set; }
    public Paging paging { get; set; }
}

and in another class, I have method:

public T RequestAllPaginated<T>() where T : Paginated<AnyType> //AnyType???
{
    var item = Request<T>();

    //Get all data from paging property
    if(item != null)
    {
        var i = item as Paginated<AnyType>; //AnyType???
        var data = i.data;

    }

    return item;
}

T is always a Paginated<AnyType> type. The question is how can I determine in RequestAllPaginated method declaration and cast it later on?

Upvotes: 2

Views: 94

Answers (1)

Mike
Mike

Reputation: 4051

Try this solution

public T RequestAllPaginated<T, TK>() where T : Paginated<TK> where TK : class
{
    var item = Request<T>();

    //Get all data from paging property
    if(item != null)
    {
        var i = item as Paginated<TK>;
        var data = i.data;

    }

    return item;
}

Alternative solution:

public Paginated<T> RequestAllPaginated<T>() where T : class
{
    var item = Request<Paginated<T>>();

    //Get all data from paging property
    if(item != null)
    {
        var i = item as Paginated<T>;
        var data = i.data;

    }

    return item;
}

Upvotes: 3

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