Get matching records from two lists c#

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WebOct 31, 2013 · However, you can perform a sort before you do the search, to give you your sets in a hierarchical date order. The call will be. var sets = items.OrderByDescending (i … WebJan 27, 2016 · Now let's instantiate two lists of foo: List () The first list contains two foo objects: new foo () = { name = "name", property1 = "random value", property1 = "random value" } new foo () = { name = "name", property1 = "random value", property1 = "random value" } The second list contains one foo object:

C# generic list compare and get unmatched rows - Stack Overflow

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() WebMay 20, 2016 · Use Enumerable.Join to get items which match in both lists: from x in firstlist join y in secondList on x.code equals y.Code select new { x.Name, code = String.Format (" {0} {1}", y.Code, y.description) } Updating objects in first list: cinnamon life sri lanka

c# - LINQ compare two lists and remove - Stack Overflow

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. WebApr 2, 2013 · var commonNumbers = first.Intersect (second); This will give you the common values between two lists, a much faster and cleaner approach than join or other Lambda expressions. Just try it. Source : MSDN Share Improve this answer Follow edited Sep 7, 2024 at 22:23 InteXX 6,009 6 40 74 answered Feb 20, 2014 at 10:11 Ambuj 435 5 10 8 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 … cinnamon makeup

c# - How to get records in EF that match a list of combinations …

c# - How to get matched records from Dictionary Model and List …

WebJan 7, 2013 · var newList = list1.Intersect (list2).ToList (); list1.Clear (); list1.AddRange (newList); Of course, all of this does require you to implement equality appropriately in DownloadTask - but if you haven't done so already, it sounds like … WebJul 2, 2016 · I made the first one which returns matched elements between the 2 lists and the result is the following {UserId= 2,FormName="Form1",CompName="Button3",Privilege=3} The 2nd function should return elements that exist in the first list and not in the second list, with the following result cinnamon mckinnonWebApr 7, 2024 · ChatGPT cheat sheet: Complete guide for 2024. by Megan Crouse in Artificial Intelligence. on April 12, 2024, 4:43 PM EDT. Get up and running with ChatGPT with this comprehensive cheat sheet. Learn ... cinnamon massage oil

"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. " - Get matching records from two lists c#

Get matching records from two lists c#

c# - Comparing two lists with LINQ, and retrieve the different …

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:

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WebFeb 18, 2024 · I need to get the matching items in mylist1 and mylist2. The match should happen only on Property1 and Property2. Property3 in the mylist2 can be ignored during comparison. Currently I use var matchingCodes = mylist1.Where (l1 => mylist2.Any (l2 => (l2.Property1 == l1.Property1 && l2.Property2==l1.Property2))).ToList (); which works … 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, …

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 … 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 …

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. 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:

WebJul 17, 2013 · 3 Answers Sorted by: 4 You need the Except method: var yourResult = col1.Except (col2); If both of your collections aren't the same type, then you're going to have to do a more expensive O (nm) search: var selectedTwo = col2.Select (x => x.ID).ToHashSet (); var yourResult = col1.Where (n => !selectedTwo.Contains (n.ID));

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. cinnamon manjaro installWebJun 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 ... cinnamon myrtle tasteWebAug 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 ... cinnamon myrtle nutritional valueWebJun 26, 2013 · You can always use Linq's own .Except () method to do the comparison for you, and bring back the "exception" or the inverse of what you expected. newErr = errList.Except (hList).ToList (); Here I am intersecting an array errList with another array hList, and bringing back the inverse or the lines that did not exist in the hList array. cinnamon munchkin dunkin donutsWebTo do this effectively you can first put the codes into a HashSet and then use a Contains () query to check if the B in question has a code that is contained in the hashset: var codes = new HashSet (listOfAs.Select (x => x.code)); var selectedBs = listOfBs.Where ( x=> codes.Contains (x.code)); Share Improve this answer Follow cinnamon monkeyWebMar 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. cinnamon milk cinnamon moussaka