Get matching records from two lists c#
WebFeb 19, 2024 · public List GetList2 () { List mappingListDb = new List (); var query = from K360mapMaster in _context.K360mapMasters select K360mapMaster; var mappings = query.ToList (); foreach (var mappingData in mappings) { mappingListDb.Add (new K360mapMaster () { ClientCatalog = mappingData.ClientCatalog }); } return … WebSep 24, 2008 · In C# 2.0 you'd write: result = mObjList.Find (delegate (int x) { return x.ID == magicNumber; }); 3.0 knows lambdas: result = mObjList.Find (x => x.ID == magicNumber); Share Improve this answer Follow answered Aug 23, 2008 at 0:41 Konrad Rudolph 523k 130 930 1207 Add a comment 4 Using a Lambda expression:
Get matching records from two lists c#
Did you know?
WebMar 23, 2024 · I have two lists in C#. I need a LINQ query to compare and list only unmatched rows. List firstList; List secondList; both have the unique property called ID; ID Desc1 Desc2 Status 1 aaa mm P 2 bbb fff S 3 ccc ttt P 4 ddd yy S 5 eee ggg P. I want to compare the Desc1 and Desc2 in firstList with the secondList and …
WebAug 3, 2024 · I want to get mismatching rows in two datatables using linq in c#. I am able to get matching rows but not mismatching rows. My Linq query is as below: ... Will get the records from dt1 which are not exists from dt2 var query = from r1 in dt1.AsEnumerable() join r2 in dt2.AsEnumerable() WebIf you override the equality of People then you can also use: peopleList2.Except(peopleList1) Except should be significantly faster than the Where(...Any) variant since it can put the second list into a hashtable.Where(...Any) has a runtime of O(peopleList1.Count * peopleList2.Count) whereas variants based on HashSet …
WebAug 27, 2012 · C# Linq, Searching for same items in two lists. we have the following setup: We have a array of objects with a string in it (xml-ish but not normalized) and we have a list/array of strings with id. We need to find out if a string from that list with id's is also pressent in one of the objects. public class Wrapper { public string MyProperty ... WebYou could do something like: HashSet sentIDs = new HashSet (SentList.Select (s => s.MsgID)); var results = MsgList.Where (m => !sentIDs.Contains (m.MsgID)); This will …
WebJan 3, 2024 · This is a notorious problem that I discussed before here.Krishna Muppalla's solution is among the solutions I came up with there. Its disadvantage is that it's not sargable, i.e. it can't benefit from any indexes on the involved database fields.
WebAug 30, 2024 · List.FindAll (Predicate) Method is used to get all the elements that match the conditions defined by the specified predicate. Properties of List: It is different from the arrays. A list can be resized dynamically but arrays cannot. List class can accept null as a valid value for reference types and it also allows duplicate elements. call him up ゴスペルWebMar 28, 2011 · I have 2 lists. 1 is a collection of products. And the other is a collection of products in a shop. I need to be able to return all shopProducts if the names match any Names in the products. I have this but it doesn't seem to work. Any ideas? var products = shopProducts.Where (p => p.Name.Any (listOfProducts. calligaris カリガリス duca デュッカWebMay 30, 2013 · 4 Answers Sorted by: 282 You can use Contains () for that. It will feel a little backwards when you're really trying to produce an IN clause, but this should do it: var userProfiles = _dataContext.UserProfile .Where (t => idList.Contains (t.Id)); I'm also assuming that each UserProfile record is going to have an int Id field. calling you 歌詞 たくいWebMar 16, 2024 · var differences = new HashSet (songs); differences.SymmetricExceptWith (attributes.Select (a => a.name)); if (differences.Any ()) { // The lists differ. } Share Improve this answer Follow answered Oct 1, 2013 at 15:05 Andrew Stephens 9,189 5 75 145 Add a comment 5 This is the way to find all the songs which aren't included in attributes names: calling you 歌詞 バグダッドカフェWebSep 18, 2024 · I would like to loop through a list of item, find the matching record in another list and check a property of that item in the new list is enabled/disabled. if false, … callmeback ユーミンWebJun 29, 2011 · 4. You can do this by counting occurrences of all items in all lists - those items whose occurrence count is equal to the number of lists, are common to all lists: static List FindCommon (IEnumerable> lists) { Dictionary map = new Dictionary (); int listCount = 0; // number of lists foreach (IEnumerable list in ... call of duty オンラインWebApr 28, 2015 · 9. Sort both lists with an efficient sorting algorithm (or ensure that the lists are "pre-sorted" by whoever/whatever created them). Then, if the first name in both lists is the same you've found a match, otherwise discard whichever name is "earlier"; and do that until one of the lists are empty. call on me モーション配布