2024 C# find item in list by property

C# find item in list by property

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WebNov 17, 2015 · c# - Find objects in a list where one property contains duplicate values - Stack Overflow Find objects in a list where one property contains duplicate values [duplicate] Ask Question Asked 7 years, 4 months ago Modified 1 year, 10 months ago Viewed 5k times 2 This question already has answers here: WebOct 18, 2016 · list.Find (i => i.Property == value); // C# 3.0+ list.Find (delegate (Item i) { return i.Property == value; }); // C# 2.0+. Both of these options return default (T) ( null for …

c# - How to use LINQ to select object with minimum or maximum property …

WebYou can use the Find method on the generic list class. The find method takes a predicate that lets you filter/search the list for a single item. List list = // ..; CompareDesignGroup item = list.Find (c => c.FieldId == "SomeFieldId"); item will be null if there is no matching item in the list. WebJun 11, 2024 · There are a few ways (note that this is not a complete list).. Single will return a single result, but will throw an exception if it finds none or more than one (which may or may not be what you want):. string search = "lookforme"; List myList = new List(); string result = myList.Single(s => s == search); firewater restaurant \u0026 lounge charlotte nc

Find an element in a List in C# Techie Delight

WebYou don't actually need LINQ for this because List provides a method that does exactly what you want: Find. Searches for an element that matches the conditions defined by the specified predicate, and returns the first occurrence within the entire List. Example code: PricePublicModel result = pricePublicList.Find(x => x.Size == 200); WebC# Dictionary Versus List Lookup Time Both lists and dictionaries are used to store collections of data. A Dictionary int, T > and List T > are similar, both are random access … WebNov 19, 2011 · First, consider whether you even need these setters - if so, they should take a List, not just a string: set { _subHead = value; } These lines: newSec.subHead.Add ("test string"); Are calling the getter and then call Add on the returned List - the setter is not invoked. Share Follow answered Nov 19, 2011 at 18:13 Oded firewater restaurant sheridan wy

c# - How can I get LINQ to return the object which has the max value …

WebUsing properties, you would search for items in the list like this MyClass result = list.Find (x => x.Id == "xy"); You can also use auto-implemented properties if you need a read-only property: public string Id { get; private set; } This enables you to set the Id within the class but not from outside. WebJan 3, 2024 · Using List.FindIndex () Method. This method returns the occurrence of the first element mentioned in the predicate and returns -1 if no element satisfies the condition. … fire water roof tankWebJun 26, 2013 · C# compare two Lists by one Property and change value of first List-2. Compare two struct List and find if item of list1 appears in item of list2 in C#. 1. How to search any items of a list within a string using Linq. 0. C# foreach to linq. 0. Fastest way to compare two List etsy search engine optimization

"WebC# Dictionary Versus List Lookup Time Both lists and dictionaries are used to store collections of data. A Dictionary int, T > and List T > are similar, both are random access data structures of the .NET framework.The Dictionary is based on a hash table, that means it uses a hash lookup, which is a rather efficient algorithm to look up things, on the other … " - C# find item in list by property

C# find item in list by property

C# get and set properties for a List Collection - Stack Overflow

WebMar 2, 2015 · I have the following objects defined: public class MyGroup { public MyItem[] Items; } public class MyItem { public int Val; } Say I have a list as List where each MyGroup object contains a varying number of MyItems; which in turn contains a varying value for Val. 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. c# linq

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WebJan 22, 2015 · myStaticList .Where(a=>a.bList .Where(b=>b.cList .Where(c=>c.CId == 12345) != null) != null) .something logical .Name = "Specific element in static list is now changed."; Please note that i want to change the property of that specific item in … WebJan 28, 2013 · The list HotelRooms has 10 items. I want to find the maximum value of AverageNightlyRate. ... we can Select() the property list we are interested in. Then we can slip in DefaultIfEmpty. Calling Min() or Max() ... c#; linq; or ask your own question.

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 … WebYou can use find with a Predicate as follows: list.Find (x => x.Id == IdToFind); This will return the first object in the list which meets the conditions defined by the predicate (ie in my example I am looking for an object with an ID). Share Improve this answer Follow answered Dec 21, 2010 at 2:00 Greg Sansom 20.2k 6 58 76

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 { … WebNov 22, 2015 · If you can't use a third party library you can get the min ID first and then get the person that has the min ID: var minID = person.Min (x => x.ID); var person = persons.First (x => x.ID == minID); Share. Follow. answered Nov 5, 2014 at 10:06. Selman Genç. 99.4k 13 118 183. this is not without sorting the list first.

WebApr 2, 2013 · PropA { int a; int b; } and another List PropX { int a; int b; } Now i have to find items from List which exist in List matching b property using lambda or LINQ. c# linq collections lambda Share Improve this question Follow edited Apr 2, 2013 at 16:46 Michael Myers ♦ 188k 45 291 292 asked Apr 2, 2013 at 16:45 donstack

WebJul 17, 2012 · You can OrderByDescending the List on the ActivationDate Field and then take FirstOrDefault () Product.OrderByDescending (p => p.ActivationDate).FirstOrDefault (); For a more simpler version there is an extension method MaxBy Product.MaxBy (p => p.ActivationDate); Share Follow edited Jul 17, 2012 at … fire water restoration naples flWebI have an interface (IAnimal) which is implemented by two classes, Bear and Goat.At runtime, I may end up with a List of Bears, Or Goats, but whichever it is they need to be assigned to property IEnumerable. This works, as IEnumerable is co-variant.. However, I now need to remove items from IEnumerable which of course does … firewater restoration pittsburgh paWebExample: c# get index of item in list Array.IndexOf(arrName, searchingFor) firewater saloon edison park ilWebJun 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. firewater saloon chicago il etsy search order numberWebYou can covert your list to a dictionary using Linq by calling the ToDictionary () extension method: IDictionary questions = _mQuestions.ToDictionary (q => q.id); This uses the ID of the Question object as the key, and the object as the value. Then in your code, you can do the following: firewater saloon chicagoWebC# using System; using System.Collections.Generic; using System.Linq; using System.Xml.Linq; namespace Find { class Program { private static string IDtoFind = "bk109"; private static List Books = new List (); public static void Main(string[] args) { FillList (); // Find a book by its ID. firewater saloon gluten free