public static IQueryable <TV> GroupAndSelect <T, TU, TV>(this IQueryable <T> query, GroupBySelector <T, TU, TV> selector)
{
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
var grouping = selector.GroupBy().ResolveEmbedded();
var expression = selector.BuildExpression().ResolveEmbedded();
return(query.GroupBy(grouping).Select(expression));
}
public static Task <Dictionary <TU, TV> > GroupByDictionaryAsync <T, TU, TV>(this IQueryable <T> query, GroupBySelector <T, TU, TV> selector)
{
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
var grouping = selector.GroupBy().ResolveEmbedded();
var expression = selector
.BuildExpression()
.ResolveEmbedded()
.Compile();
return(query.GroupBy(grouping).ToDictionaryAsync(x => x.Key, expression));
}