C# find item in list of objects

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WebDec 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 WebJun 3, 2024 · How To Find An Item In C# List. C# List class provides methods and properties to create a list of objects (classes). The Contains method checks if the specified item is already exists in the List. List is a generic class. You must import the following namespace before using the List class.

How To Find An Item In C# List - c-sharpcorner.com

WebFind an item in a generic list by specifying multiple conditions. CartItem Item = Items.Find (c => c.ProductID == ProductID); Item.Quantity = Quantity; Item.Price = Price; So the above code finds and updates with other data, but if I want to find by multiple conditions, then how do I write the code? WebMay 26, 2024 · I created a simple setup to try to write the appropriate Linq statement in C#. I'm trying to return a BOOLEAN that checks the following Example 1: Where Product title = 'ERDSIC' and Property title = 'size' and val = 1001 (should return TRUE) Example 2: Where Product title = 'ERDCON' and Property title = 'size' and val = 1001 (should return FALSE) exercises instead of deadlift

c# - How to find a single item in a list of objects? - Stack Overflow

WebJun 11, 2024 · Here I have a simple example to find an item in a list of strings. ... You want to search an object in object list. This will help you in getting the first or default value in your Linq List search. var item = list.FirstOrDefault(items => items.Reference == ent.BackToBackExternalReferenceId); ... C# LINQ find duplicates in List. 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); WebPandas how to find column contains a certain value Recommended way to install multiple Python versions on Ubuntu 20.04 Build super fast web scraper with Python x100 than BeautifulSoup How to convert a SQL query result to a Pandas DataFrame in Python How to write a Pandas DataFrame to a .csv file in Python exercises it band

c# - Get the max. value in List of objects - Stack Overflow

Define a List of Objects in C# - Stack Overflow

WebConsole.WriteLine(vbLf & "Contains: Part with Id=1734: {0}", parts.Contains(New Part() With { _ .PartId = 1734, _ .PartName = "" _ })) ' Find items where name contains "seat". … WebThe following example demonstrates the usage of the Contains () method: 2. Using List.IndexOf () method. Another good solution is to use the List.IndexOf () method that … btd battles medallions hack pcWebJul 1, 2013 · If you are trying to find an object in collectionMyObject which has item with id 2, then this should work: MyObject myObject = collectionMyObject.FirstOrDefault (o => o.Items != null && o.Items.Any (io => io.Id == 2)); And if you are try to find an inner item with id 2, then this query with SelectMany might be helpful: exercise skill related fitness

"WebDec 30, 2015 · Given that crepes is a List, you need to add an additional level to the linq query. var item = crepes.Where (a => a.item.Any (x => x.doritos == "coolRanch")).FirstOrDefault (); Your item access modifier is private (this is C# default for class ), it should be made public. Also, since your crepes is a List, put additional layer of … " - C# find item in list of objects

C# find item in list of objects

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

WebAug 25, 2011 · Just to add to CKoenig's response. His answer will work as long as the class you're dealing with is a reference type (like a class). If the custom object were a struct, this is a value type, and the results of .FirstOrDefault will give you a local copy of that, which will mean it won't persist back to the collection, as this example shows:. struct MyStruct { … WebList items = getItems(); How can I use LINQ to return the single "Item" object which has the highest ID? If I do something like: items.Select(i => i.ID).Max(); I'll only get the highest ID, when what I actually want returned is the Item object itself which has the highest ID? I want it to return a single "Item" object, not an int.

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WebMay 27, 2014 · 0. You can make an index by creating a dictionary with the GUID string as key and the object as value: Dictionary index = CustomerList.ToDictionary (c => c.uuid); Now you can look up objects very fast: Customer c = index ["GUID I'm searching"]; If you don't know if the guid exists in the list: WebI have a C# console app. My app has a class called Item. Item is defined like this: public class Item { public int Id { get; set; } public string Name { get; set; } public string Description...

WebMar 15, 2016 · Or if you only one the first book found in the list, use var myBook = books.FirstOrDefault (x => x.author.IndexOf ("George R.R. Martin", StringComparison.InvariantCultureIgnoreCase) >= 0); Share Improve this answer Follow answered Mar 15, 2016 at 16:01 Legacy Code 649 6 10 Add a comment Your Answer

WebJul 30, 2024 · 3 Answers Sorted by: 6 You can use the Any extension method: var text = nameClassStudents.Text; if (!_ClassStudentsList.Any (t => t.Text == text)) { _ClassStudentsList.Add (new ClassStudents (text, (int)numericUpDown1.Value)); } However, this does not guarantee that names will be unique in the list. WebDec 22, 2024 · 2 Answers Sorted by: 4 If I understand your question correctly, you can use FirstOrDefault var fileCabinet = fileCabinets.FirstOrDefault (x => x.Id == 1); If you want to stay with Find () var fileCabinet = fileCabinets.Find (x => x.Id == …

WebJan 28, 2013 · 3 Answers Sorted by: 22 Use Enumerable.Max: var maxAverageRate = HotelRooms.Max (r => r.RoomPriceDetails.AverageNightlyRate) If RoomPriceDetails could be null, then: var maxAverageRate = HotelRooms.Where (r => r.RoomPriceDetails != null) .Max (r => r.RoomPriceDetails.AverageNightlyRate); Or

WebJul 1, 2009 · One option for the follow on question (how to find a customer who might have any number of first names): List names = new List { "John", "Max", "Pete" }; bool has = customers.Any (cus => names.Contains (cus.FirstName)); or to retrieve the customer from csv of similar list. btd battles modded towers download pcWebThe following example demonstrates the find methods for the List class. The example for the List class contains book objects, of class Book, using the data from the Sample XML File: Books (LINQ to XML). The FillList method in the example uses LINQ to XML to parse the values from the XML to property values of the book objects. exercises in the waterWebOct 18, 2016 · 6 Answers. Sorted by: 152. You have a few options: Using Enumerable.Where: list.Where (i => i.Property == value).FirstOrDefault (); // C# 3.0+. … exercises in style pdfWebJun 12, 2024 · You can use the IndexOf () method to get the index of a given element of your List<>. However, note that since a linked list implies no random access, there really isn't any other way to find a specific element (and consequently its index) other than starting from the beginning and checking one element at a time. Share Improve this answer Follow btd battles modded towers downloadWeb1. You can replace the .Where with .First in the first place and delete it from the end. It will be the same result but with cleaner and faster code. Do it like the following: customListItem2 = customListItems.First (i=> i.name == "Item 2"); – Roman R. Jul 7, 2016 at 10:04. btd battles modded apkWeb8 Answers Sorted by: 63 You need to reference System.Linq (e.g. using System.Linq) then you can do var dupes = dupList.GroupBy (x => new {x.checkThis, x.checkThat}) .Where (x => x.Skip (1).Any ()); This will give you groups with all the duplicates The test for duplicates would then be btd battles modded towersWebApr 2, 2013 · Well all above will not work if you have multiple parameters, So I think this is the best way to do it. For example: Find not matched items from pets and pets2 . var notMatchedpets = pets .Where (p2 => !pets2 .Any (p1 => p1.Name == p2.Name && p1.age == p2.age)) .ToList (); Share Improve this answer Follow edited Feb 3, 2016 at 10:42 … btd battles moab