2024 Filter list by another list c#

Filter list by another list c#

Author: syhg

August undefined, 2024

Web對於您上面的查詢，您還可以同時使用Any()和Contains() ，它的工作方式如下：根據您的篩選器是具有IDs和Entity2的集合也是collection，因此假設我編寫了此代碼，. query = query.Where(x => filter.Where(a=> a.Entity2.Any(y=> a.Ids.Contains(y.testId)); 但是在查詢中，您也可以刪除First()並可以使用ToList()但是如果數據很大，它 ... WebMay 22, 2024 · Here is my attempt : List newList = mainList.Where (x => x.Id == 5 && !blackList.Contains (x)).ToList (); This newList is generated inside a loop, in the first round of the loop, blackList is empty and it works, in the second round blackList contains about 200k elements.

Filtering a List using contents of another List - Stack Overflow

WebFor your above query you can also use Any() and Contains() both , it will work as According to you filter is collection which has Ids and Entity2 both are also collection , so assuming … WebJun 3, 2016 · Returning a list that is filtered based on another list in C# Ask Question Asked 6 years, 10 months ago Modified 6 years, 10 months ago Viewed 316 times 2 Im quite new to C# so trying to test a simple string filter but not getting the desired results. This is my test method: timetabling solutions training

In C#, how to filter a list using a StartsWith () condition of another ...

WebMar 15, 2024 · Example code: List A = //some list of strings List B = //another list of strings, the same length as A List res = new List (); //new list to collected the filtered result for (int i = 0; i < A.Count; i++) if (B [i] == someVal) res.Add (A [i]); I'm hoping to have something along the lines of (fake code): WebAug 15, 2024 · I have a list of users for a timespan, for arguments sake let's say a month.So in that list certain users do not meet the criteria I want for a certain objective so I want to filter out the list and display the filtered out data into another list.So how I replicated the list was as follows:. List List1 = new XPQuery(session) .Where(w => … WebMar 29, 2024 · Filtering a list using another list in C# - Chubby Developer Language Integrated Query, also known as LINQ, is a powerful query language that is introduced in … paris hotel suites with eiffel tower view

c# - Filter a collection with another list using lambda expression ...

c# - How do i filter one list from another list using linq

WebTo filter a list based on a condition that involves checking whether an element in the list starts with any of the elements in another list, you can use LINQ's Where method and … WebLINQ query to filter the movies by selected genres. First, I added a filter for the selected genres (a string array) in Figure 2. The GetMovies () method returns a list of movies. In this case, it’s a just a small collection created within the method, but it could have been retrieved from a database. Next, the genre from the list of movies is ... timetabling soton.ac.ukWebApr 14, 2024 · result = m_list.findAll (item => filters.Contains (item.name =="name" && item.category == "category" && item.price= "price")); Of course I can do this but for that I should have a fixed amount of items in the filters list. I want to add dynamic behavior in this filter operation so it can handle any number of parameters in the filters list and ... timetabling strathclyde

"WebC# List without Elements of another List (set theory, complement) 0. Return a List that has items that do not exist in a List-1. How to filter the list of object with list of object? 0. C# compare specific item property between two lists. 648. LEFT OUTER JOIN in LINQ. 64. " - Filter list by another list c#

Filter list by another list c#

c# - How to filter a list by another list - Stack Overflow

WebFeb 10, 2024 · 1 Answer. Sorted by: 3. With LINQ it looks so: List finalEventList = eventList .Where (ev => ev.CountryList.Select (c => c.Id).Intersect (countriesListParameter).Any ()) .ToList (); So all events that have countries which Id is contained in the parameter-list. You could also use Contains, but it is less efficient than … WebIf 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. List filteredList = myList.Where (x => x > 7).ToList ();

Did you know?

WebJan 24, 2014 · I tried below: List ratings = bidResults.Select (bidResult => new Rating {RatingId = bidResult.BidResultId}).ToList (); but I am not able to access BidResultId from bidResult. Please note bidResult is a strongly typed list. Adding a . after bidResult show lambda functions like select, foreach, single etc. c#. WebMay 23, 2012 · 1. Try using some linq. 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 …

WebMay 10, 2024 · Now, your list could look like: C# List Categories = new List () { new Category ( "Books", "001" ), new Category ( "Cars", "002" ), new Category ( "Tools", "003" ) }; And another list of categories (CategoryCode): C# List lst = new List () { "Cars" , "Dogs" }; Finall query: C# WebJul 16, 2014 · Solution 1. This, of course, is very inefficient. Time grows proportional to the product of the lengths of the two lists. So make the inner test faster: This now takes time proportional to the sum of the lengths of the two lists. Creating and populating the groupEmails is a single pass over the groupUsers collection.

WebI want to filter the fileLst to return only files containing any of folder names from the filterList. (I hope that makes sense..) I have tried the following expression, but this always returns an empty list. var filteredFileList = fileList.Where(fl => fl.Any(x => filterList.Contains(x.ToString())));

WebJan 24, 2024 · Linq get list of indexes matching a condition to filter another list against. List MList = new List (new double [] { 0.002, 0.123, 0.457, 0.237 ,0.1}); I would like to use Linq, to retrieve from that list, all indexes of items below a value, so if the value to compare against is 0.15 it sould result the folowing indexes : 0,1,4.

WebJan 24, 2024 · Coming from a C# background and being a complete PowerShell novice, I am trying to make a simple filtering based on two lists/arrays. Goal: filter elements of list 'toFilter' based on list 'filter', so to only keep elements of 'toFilter', which are matching at least one of the patterns listed in 'filter'. timetabling team university of essexWebApr 28, 2024 · I've got a list of objects List named containers. I've got a list of numbers List named containerIds. How can I get a subset of containers where the Id is in containerIds? Something like the following: var … timetabling supportWebFor your above query you can also use Any() and Contains() both , it will work as According to you filter is collection which has Ids and Entity2 both are also collection , so assuming that i wrote this,. query = query.Where(x => filter.Where(a=> a.Entity2.Any(y=> a.Ids.Contains(y.testId)); but in your query also you can remove First() and can use … timetabling team exeterWebTo filter a list based on a condition that involves checking whether an element in the list starts with any of the elements in another list, you can use LINQ's Where method and the StartsWith method to perform the comparison. Here's an … timetabling staffWebJan 4, 2024 · C# filter list with FindAll In the following example, we filter a list with the built-in FindAll method. Program.cs var vals = new List {-1, -3, 0, 1, 3, 2, 9, -4}; List filtered = vals.FindAll (e => e > 0); Console.WriteLine (string.Join (',', filtered)); The example finds out all integer values that are greater than zero. timetabling surreyWebFeb 27, 2024 · 'SelectedAccountOwners' is a list of strings based on a multiselect box... [BindProperty (SupportsGet = true)] public List SelectedAccountOwners { get; set; } How can I filter 'transactions' so that only records with an Account.AccountOwner.Name in the list of 'SelectedAccountOwners' remain? Index.cshtml.cs timetabling toolWebJun 28, 2012 · How can I filter-out values from the "dataset" list which contain any keyword from the "excluded" list? c#.net; linq; filtering; Share. ... that are not in another List<> 1277. Call one constructor from another. 198. How to merge 2 List and removing duplicate values from it in C#. 413. Difference in months between two dates. 894. Entity ... timetabling software universities