Filter records from list in c#
WebMar 29, 2024 · You'll have to extract the _id from the BsonDocument like this: var extractedIds = myIds.Select (x => x ["_id"].ToString ()).ToList (); After which you can use it in the filter. list.DeleteMany (Builders.Filter.In ("_id", extractedIds)); Make sure that the _id part of the filter matches that of the MessageExchange class WebMar 14, 2024 · Filtering refers to the operation of restricting the result set to contain only those elements that satisfy a specified condition. It is also known as selection. The following illustration shows the results of filtering a sequence of characters. The predicate for the filtering operation specifies that the character must be 'A'.
Filter records from list in c#
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WebMay 6, 2010 · Every column in the DataTable is of type String. We need to convert this DataTable into a strongly typed Collection of "ReturnItem" objects so that we can then … WebAug 31, 2013 · If you want your list to contain unique values for each duplicate, use this code instead: var duplicates = mylist.Where (item => !myhash.Add (item)).ToList ().Distinct ().ToList (); – solid_luffy Jul 25, 2024 at 13:08 Show 1 more comment 27 To find the duplicate values only: var duplicates = list.GroupBy (x => x.Key).Where (g => g.Count …
WebMay 24, 2012 · List itm = new List; //Fill itm with data //get selected item from control string selectedcategory = cboCatetories.SelectedItem; var itms = from BO in itm where itm.ItemCategory = selectedcategory select itm; itms now contains all items in that category Share Improve this answer Follow answered May 24, 2012 at 22:03 WebFeb 19, 2024 · private static List selectFields (ref List fields) { var distinct = fields .GroupBy (x => new { x.CUSTOMER_NAME, ips = string.Join (" ", x.LOGON_IP) }) .Where (chunk => chunk.Count () == 1) .Select (chunk => chunk.First ()) .ToList (); return distinct; } Share Improve this answer Follow edited Feb 19, 2024 at 10:07
WebDec 21, 2024 · Filtering through a data set is one of the most basic operations a developer should know how to perform. Filtering refers to the process of restricting the result set to contain only those elements that … WebAug 19, 2024 · C# Sharp Code: using System; using System.Collections.Generic; using System.Linq; using System.Text; …
WebThis post will discuss how to filter a list in C#. 1. Using Enumerable.Where() Method. A simple and elegant solution to filter a list is using LINQ. It has a Where() method that …
WebMay 26, 2014 · 5 Answers. Sorted by: 191. You can use the Distinct method to return an IEnumerable of distinct items: var uniqueItems = yourList.Distinct (); And if you need the sequence of unique items returned as a List, you can add a call to ToList: var uniqueItemsList = yourList.Distinct ().ToList (); Share. allon zibiWebJul 2, 2024 · List myList; myList is originally sorted based on index. I want a temporary list created out of myList for scores between 50 and 75, sorted based on … allonzeWebAug 24, 2015 · One way to optimize this a bit would be to store all the possible transaction details in a hash set upfront. The lookup should then be pretty close to O(1) (assuming a fair hashcode distributation) instead of O(n) - bringing the overall complexity of the algorithm from O(n * k) down to O(n + k). all on x dental implantsWebSep 25, 2012 · var distinctKeys = employees.Select (e => new { e.empLoc, e.empPL, e.empShift }) .Distinct (); var joined = from e in employees join d in distinctKeys on new { e.empLoc, e.empPL, e.empShift } equals d select e; // if you want to replace the original collection employees = joined.ToList (); Tim I tried with IEqualityComparer and its worked … all on you nick fradiani audioWebApr 11, 2024 · Considering Sender value as 1, If Sender is 1 and Receiver is 2 as well as Sender is 2 and Receiver is 1 then it should filter out those records. It should take highest time from above filtered result and return only one record (Sender, Receiver, Time and Val) for each Receiver. My First preference is filtering using lambda expression and ... allonzier la caille locationWebAdd a comment. 0. This LINQ below will generate the SQL for a left outer join and then take all of the results that don't find a match in your exclusion list. List filteredResults =from p in people join e in exclusions on p.compositeKey equals e.compositeKey into temp from t in temp.DefaultIfEmpty () where t.compositeKey == null select p. allon zoo champWebIf you're using C# 3.0 you can use linq, which is way better and way more elegant: List myList = GetListOfIntsFromSomewhere(); // This will filter ints that are not > 7 out of the list; Where returns an // IEnumerable, so call ToList to convert back to a List. … allonzo trier draft