public static async Task <PagedResultSet <TK> > ExecuteAsync <T, TK>(this PageRequest request, IQueryable <T> source, Func <T, TK> converter) where T : class
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
var pageItemsQuery = request.CreateQuery <T>(source);
var totalItemsQuery = request.GetTotalRecordCountQuery(source);
var items = await pageItemsQuery.ToArrayAsync();
var totalItemsCount = await totalItemsQuery.CountAsync();
return(new PagedResultSet <TK>(items.Select(converter).ToArray(), request, totalItemsCount));
}