WebDictionary existingItems = (from ObjType ot in TableObj select (new KeyValuePair (ot.Key, ot.TimeStamp)) ) What I'd like to have at the end would be a Dictionary, without having to download the whole ObjectType objects from TableObject. I also considered the following code, but I was trying to find a proper way: Web4 hours ago · Concat all strings inside a List using LINQ. 756 Using LINQ to remove elements from a List ... Flatten List in LINQ. 210 Convert list to dictionary using linq and not worrying about duplicates. 1077 How do you set the Content-Type header for an HttpClient request? 108
How can I Remove items from dictionary using lambda expression
WebMar 31, 2010 · var maleStudents = allStudents .SelectMany (x => x.Values) .Where (x => x.Gender=="m"); The trick to this is the SelectMany operation. It has the effect of flattening a collection of List into a single collection of Student. The resulting list is the same as if you'd lined up each list front to back. Share. WebJun 8, 2016 · To get the only key it you always expect it to find one, and only one: Items.Where (p => p.Value.Number == x).Select (p => p.Key).Single (); Items.Where (p => p.Value.Number == x).Select (p => p.Key).First (); Minor correction: From my reading it would be p.Value.Number == x. Also may also be worth using Single or SingleOrDefault … the park sports center milford ma
Using Linq to get values from the Datatable columns in VB.NET / …
WebJul 5, 2013 · List countryNames = countriesDictionary.SelectMany ( pair=>pair.Value.Where ( country=>country.CountryCode == pair.Key ).Select (x=>x.CountryName)).ToList (); foreach (var name in countryNames) Console.WriteLine (name); But the way your Dictionary is set up, the key should always match the country … WebJun 12, 2024 · LINQ will use the GetEnumerator method to itterate the items. Straight from MSDN. The enumerator returned from the dictionary is safe to use concurrently with reads and writes to the dictionary, however it does not represent a moment-in-time snapshot of the dictionary. The contents exposed through the enumerator may contain modifications … WebYou shouldn't be using LINQ to find a key in a Dictionary - the Dictionary has more efficient methods for doing that - ContainsKey / indexer pair or more optimal TryGetValue. For instance: int key = 2; (A) var result = dic.ContainsKey (key) ? dic [key].Where (x => x == true).ToList () : new List (); (B) shut up and drive driving school pineville la