WebToDictionary to build a dictionary of (reservation, list of reservation), like the following code: Dictionary> result = reservations.OrderBy (r => r.Id) .GroupBy (x => new { x.StartDate, x.Room.Number }) .Where (x => x.Count () > 1) .ToDictionary ( x => x.First (), y => y.Skip (1).ToList () ); For test : WebApr 13, 2024 · var myDictionary = entities .GroupBy (e => e.EntityId) .Select (e => e.First ()) .ToDictionary (e => e.EntityId, async entity => await GetData (entity)); Unfortunately myDictionary is of type Dictionary> How to fill in the using async lambda in ToDictionary? c# linq dictionary async-await Share Follow asked Apr 13, 2024 at 14:05
c# - Group a collection and return a Dictionary - Stack Overflow
WebMar 13, 2013 · .GroupBy(x => searchTerm.Match(x.Value.Path).Value) Groups the list by the Regex match against the Path of the CachedImage. Note that I have used the Value property - the Match method returns a Match object, so it would be best to group by the actual text of the match. WebDec 12, 2024 · I have a TimeEntry class and a Dictionary with the Id as Key and the other Properties as Value. Now i want to group the dictionary by the value of Category. class TimeEntry { public int Id { get; set; } public string StartTime { get; set; } public string EndTime { get; set; } public string Task { get; set; } public string Category { get; set; } public … hill alcohol and drug treatment lake elsinore
c# - Group by in LINQ - Stack Overflow
WebAug 25, 2024 · I'm currently working on an application in C#. Imagine a store front with a checkout. I have a dictionary structure with an object as Key, and an int object counter as value. the structure looks like this: Dictionary items. The basic idea is, to pass a dictionary of Items into a method. I'm only adding unique myObjects to the ... http://duoduokou.com/csharp/68076673151689706646.html WebOct 21, 2016 · Yes I've tried some things and yes I've tried using GroupBy and I'm not 100% sure on how to use ToDictionary. Wow this community can be really poisonous at times. smart alecky crossword puzzle