Get list of list linq c#

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WebApr 7, 2024 · I have a model with list items: public class Student{ public int StudentId { get; set; } public int ClassId { get; set; } } The table values are similar to the following: StudentId ClassI... Webusing System; using System.Collections.Generic; using System.Linq; namespace UniqueListExample { class Program { static void Main(string[] args) { List numbers = new List { 1, 2, 3, 3, 4, 4, 5, 6, 6 }; // Get the unique list using LINQ List uniqueNumbers = numbers.Distinct().ToList(); // Print the unique list Console.WriteLine("Unique numbers: …

c# - Get first item in list from linq query - Stack Overflow

Web1 day ago · Remove column from Iqueryable c# after include. I'm including an entity object inside an other entity object like this: string [] columnsToRemove = { "Insurance" }; var myQuery = _dataService.GetQuery ().Include (i => i.Partner); I need to remove a column inside myQuery becouse it gives me a circular reference on client when parsed ... Web2 days ago · After realizing that I have a list in memory, I ended up being able to use the same regex on both the subject and the title in the LINQ. That's good, because they should get stripped in the same way. Here's the relevant portion of the final code: sims cc clothes free black

C# Linq Find value inside list of objects inside a list of objects

WebDec 9, 2014 · You can Select your property and create a List like: List ls = sampleList.Select (item => item.IneedThis).ToList (); Make sure your include using System.Linq; You can also achieve the same with a foreach loop like: List ls = new List (); foreach (MyObj myObj in sampleList) { ls.Add (myObj.IneedThis); } WebSep 15, 2024 · When using LINQ to query non-generic IEnumerable collections such as ArrayList, you must explicitly declare the type of the range variable to reflect the specific type of the objects in the collection. For example, if you have an ArrayList of Student objects, your from clause should look like this: C# var query = from Student s in arrList //... WebFeb 1, 2013 · You have to use the SelectMany extension method or its equivalent syntax in pure LINQ. (from model in list where model.application == "applicationname" from user … sims cc cat ears

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Find an element in List of List, c# - Stack Overflow

WebSep 13, 2013 · List> l = new List> (); l.Add (new List { 1, 2, 3, 4, 5, 6}); l.Add (new List { 4, 5, 6, 7, 8, 9 }); l.Add (new List { 8, 9, 10, 11, 12, 13 }); var result = (from e in l from e2 in e select e2).Distinct (); Update 09.2013 But these days I would actually write it as WebMar 27, 2012 · List empnames = emplist.Select (e => e.Ename).ToList (); This is an example of Projection in Linq. Followed by a ToList to resolve the IEnumerable into a List. Alternatively in Linq syntax (head compiled): var empnamesEnum = from emp in emplist select emp.Ename; List empnames = … sims cc build packs rcog team of the shift

"WebJun 27, 2011 · The best approach is to perform your linq query on the collection of key-value pairs, then use a Select projection to select either the Keys or the Values at the end of your query. This way there is no need to perform a … " - Get list of list linq c#

Get list of list linq c#

WebFeb 18, 2024 · C# void QueryHighScores(int exam, int score) { var highScores = from student in students where student.ExamScores [exam] > score select new { Name = student.FirstName, Score = student.ExamScores [exam] }; foreach (var item in highScores) { Console.WriteLine ($"{item.Name,-15}{item.Score}"); } } QueryHighScores (1, 90); WebYou can use LINQ query to do that. List list = dtusers.AsEnumerable () .Select (r=> r.Field ("UserCode")) .ToList (); Share Improve this answer Follow answered Feb 28, 2013 at 7:23 Habib 218k 29 403 432 10 thanks, For anyone wanna avoid column name use .Select (r => r.Field (0)) – Imran Qadir Baksh - Baloch

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WebC# : Is it possible to use Linq to get a total count of items in a list of lists?To Access My Live Chat Page, On Google, Search for "hows tech developer conn... WebFeb 28, 2014 · This will give you parallel List with each name and the count of how many times each name occurs. var names = grouped.Select (s => s.Key).ToList (); var nameCount = grouped.Select (s => s.Count ()).ToList (); Also... you may want to add this when assigning alldata to grouped. I use this to get a List from greatest to least amount of occurrences.

WebMay 15, 2014 · from lst in lists from i in lst group lst by i into grp where grp.Count () == 1 select new { Value = grp.Key, List = grp.Single () }; That will give you the numbers that appear only in 1 list, along with the list that contains it EDIT: simplified a bit Share … WebAccessing a List A list can be accessed by an index, a for/foreach loop, and using LINQ queries. Indexes of a list start from zero. Pass an index in the square brackets to access individual list items, same as array. Use a foreach or for loop to iterate a List collection. Example: Accessing List

WebApr 10, 2024 · I need a query to find out top 10 odd numbers in an array using LINQ in C#. I tried the below code. It works but need a single LINQ query to find the top 10 records ... WebThe LINQ Contains Method in C# is used to check whether a sequence or collection (i.e. data source) contains a specified element or not. If the data source contains the …

WebDec 9, 2024 · C# List listNozzleBySide = SectionList.SelectMany (x => x.SideList.Where (y => y.PositionList.Any (z => z.Position >= 1 && z.Position <= 5 …

WebA simple explanation is : If resulting Intersection of two iterables has the same length as that of the smaller list (L2 here) ,then all the elements must be there in bigger list (L1 here) For those who read the whole question var list3 = test2.Where (x => !test1.Any (y => x.Contains (y))); Share Improve this answer Follow rcog teamWebJul 14, 2014 · 2 Answers Sorted by: 31 A simple Enumerable.Sum would suffice. var totalFoos = fooInfo.Sum (childList => childList.Count); It computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. You can use SelectMany but performance of this would be better. Share sims cc earsWebTo get a list of values from a single column in a DataTable in C#, you can use LINQ to iterate over the Rows property of the DataTable, select the column you're interested in, … rcog teaching feedback formWebApr 10, 2024 · Now, to get each enrollment id, the name of the student, and the name of the course we need to perform a select operation on the join result. Let’s create a new … sims cc crownWebFeb 13, 2024 · var linqTable = myTable.AsEnumerable ().Where ( x => x.Field (0) == 2024); You will still end up with a list of DataRows though. The DataTable object isn't really what you should be using because it already provides a nice way to filter its rows: myTable.Rows.Find (2024); rcog tears hubWebSep 21, 2024 · C# List numbers = new() { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 }; // The query variables can also be implicitly typed by using var // Query #1. IEnumerable … rcog third trimester ultrasoundWebDec 31, 2010 · Find is not optimized at all -- it performs a linear search, since that's the only thing that makes sense on an unsorted list. If you are looking at a nicer way to write it, you could use LINQ: var element = (from sublist in userList from item in sublist where item.uniqueidentifier == someid select item).FirstOrDefault (); Share rcog tear