Get matching records from two lists c#

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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)); 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:

How do i get the difference in two lists in C#? - Stack Overflow

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: 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. ed scoda plumbing heating reviews

c# - Find items from a list which exist in another list - Stack Overflow

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 … 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 ... 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. constipated facial expressions

c# - Compare Two Lists Via One Property Using LINQ - Stack Overflow

c# - LINQ return items in a List that matches any Names (string) …

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 constipated even with fiberWebMar 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 … eds clinic toronto referral form

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

Get matching records from two lists c#

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

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, … 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.

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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 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 ...

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 … 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:

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 ... 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 …

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

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() constipated ferretWebOct 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 … eds companiesWebMar 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. constipated even with soft stoolWebFeb 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 … constipated feelingWebJan 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: eds clock hoursWebJan 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 … constipated fishWebTo 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 eds collectables