Question

I have this c# code;

case "Cafe":
  source.trendItem = new TrendingLocation<ITrendingCafe>();
  break;
case "Pub":
  source.trendItem = new TrendingLocation<ITrendingPub>();
  break;
etc

a trendItem is defined like this;

public class TrendingItem<T> where T : ITrendingItem
{
    public T trendItem { get; set; }
}

Then I have this;

public List<TrendingItem<ITrendingItem>> trendItems { get; set; }

Now for each item in the above trendItems i want to get the interfaces.

I tried using;

string g = fvm.trendItems[4].trendItem.GetType().GetInterfaces()[1].Name;

and

string g = typeof(TrendingLocation<>).GetInterfaces()[0].Name;

but neither of these lists the Generic interface such as ITrendingCafe, ITrendingRestaurant etc.

Is there a way I can get the name of the generic interface name?

Answer 1

You want to use the Type’s GetGenericArguments method.

If I understand your structure, it will be something like:

Type[] typeArguments = fvm.trendItems[4].trendItem.GetType().GetGenericArguments();

foreach (Type tParam in typeArguments)
{
    // Compare the type with the interface you are looking for.
}