2024 C# list contains item with property value

C# list contains item with property value

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August undefined, 2024

WebI have a medication table that I'm looking for certain drug names, but I need to search for multiple names. Here is where I currently am with it. string[] names = new string[2]; names[0] = "apixa... WebI couldn't find a way to check if an array contains an object that has a property which has a certain value. Solved it by doing this: Assert.Contains (result.Value.Members, x => x.Consumption == null); – Enrico Nov 28, 2024 at 14:47 Add a comment 13 You can use Assert.That in conjunction with Has.Exactly (1).Matches:

.net - LINQ Contains Based on Property - Stack Overflow

Web7 Answers Sorted by: 208 If you have a list and you want to know where within the list an element exists that matches a given criteria, you can use the FindIndex instance method. Such as int index = list.FindIndex (f => f.Bar == 17); Where f => f.Bar == 17 is a … WebMar 28, 2024 · I like the Except extension methods, but the original question doesn't have symmetric key access and I prefer Contains (or the Any variation) to join, so with all credit to azuneca's answer:. public static IEnumerable Except(this IEnumerable items, IEnumerable other, Func getKey) { return … bozeman population 2010

c# - How to Get the Value of a List Type Property using propertyInfo …

WebOf course the Dictionary in principle has a faster lookup with O(1) while the lookup performance of a List is an O(n) operation. The Dictionary map a key to a value and cannot have duplicate keys, whereas a list just contains a collection of values. Also Lists allow duplicate items and support linear traversal. Consider the following example: WebJan 5, 2024 · 3 possibilities come to mind: You could implement IEquatable: public class Item: IEquatable { public List val { get; set; } public double support { get; set; } public bool Equals (Item other) { return this.support == other.support && this.val.SequenceEqual (other.val); } } and now t.Contains (b) will return true. WebMar 31, 2016 · If you need the object/s with that value, you can use Where: var woodItems = _contents.Where (i=>i.Item == Item.Wood); Share Improve this answer Follow answered Mar 31, 2016 at 4:06 Steve 9,285 10 49 80 Add a comment 6 You could do this using Linq extension method Any. if (_contents.Any (i=> i.Item == Item.Wood)) { // logic } bozeman pontoon boat

c# - Find items from a list which exist in another list - Stack Overflow

WebDetermines whether an element is in the List. C# public bool Contains (T item); Parameters item T The object to locate in the List. The value can be null for reference types. Returns Boolean true if item is found in the List; otherwise, false. Implements Contains (T) Examples WebMay 29, 2024 · There's multiple ways to go about this. The easiest is by checking if an object with the expected property values is in the collection. There's an overload of Assert.Contains that allows you to specify a predicate, for example: Assert.Contains (MyList, item => item.Id == expectedId) bozeman police reports onlineWebNov 17, 2015 · You have a list of objects of type DuplicateTags, where DuplicateTag is a class having 2 properties. Now, to solve your problem, I would suggest you learn about LINQ. Specifically, you can use GroupBy for this: var groupedByShortName = duplicateTagsInDisplayName.GroupBy (x => x.shortName); var duplicates = … bozeman police department records

"WebYou need to create a object from your list like: List lst = new List (); CartProduct obj = lst.Find (x => (x.Name == "product name")); That object get the looked value searching by their properties: x.name Then you can use List methods like Contains or Remove if (lst.Contains (obj)) { lst.Remove (obj); } Share " - C# list contains item with property value

C# list contains item with property value

List .Contains(T) Method (System.Collections.Generic)

WebList ListToCheck = new List () {"string1","string2","string3","string4"}; List FinalList = ListToCheck.FindAll (IsContain); The final list contains only the matched elements string1 and string2 from list to check. Can easy be switched to int List. Share Improve this answer Follow answered Dec 9, 2024 at 14:05 Atanas Atanasov WebJun 20, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

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WebJun 20, 2024 · Properties of List: It is different from the arrays. A list can be resized dynamically but arrays cannot. List class can accept null as a valid value for reference types and it also allows duplicate elements. If the Count becomes equals to Capacity then the capacity of the List increases automatically by reallocating the internal array. WebHashSet a = new HashSet (list1.Select (x => x.itemname)); HashSet b = new HashSet (list2.Select (x => x.itemname)); a.IsProperSubsetOf (b) Explanation: HashSet uses the item's GetHashCode value and Equals method in an efficient way to compare items.

WebSep 12, 2013 · The basic answer is: you need to iterate through loop and check any element contains the specified string. So, let's say the code is: foreach (string item in myList) { if (item.Contains (myString)) return item; } The equivalent, but terse, code is: mylist.Where (x => x.Contains (myString)).FirstOrDefault (); WebOct 19, 2016 · Using List.Find: 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 reference types) if no match is found. As mentioned in the comments below, you should use the appropriate form of comparison for your scenario: …

WebList classList;. List namesToCompare;. classList.Any (item => namesToCompare.Contains (item.Name)) ;. // This will return true if any item in classList has a matching value for Name property in namesToCompare. Replacing .Any with .Where will return those matching items as well if you want to filter and do any further operations ... WebApr 2, 2016 · private static void Getproperties (Object Model) { Type objType = Model.GetType (); PropertyInfo [] properties = objType.GetProperties (); foreach (PropertyInfo property in properties) { object propValue; //Checking if property is indexed if (property.GetIndexParameters ().Length ==0) propValue = property.GetValue …

WebApr 2, 2013 · What you want to do is Join the two sequences. LINQ has a Join operator that does exactly that: List first; List second; var query = from firstItem in first join secondItem in second on firstItem.b equals secondItem.b select firstItem; Note that the Join operator in LINQ is also written to perform this operation quite a bit more ...

WebMar 2, 2012 · Viewed 14k times 16 Need to check if a list contains an item with a property value of X. Been using FirstOrDefault and comparing to null: searchItems.FirstOrDefault (si => si.ID == 99) == null Is there better way to do this? I cannot get past syntax errors on Contains. Thanks. .net linq Share Improve this question Follow asked Mar 2, 2012 at 15:00 bozeman population increaseWebTo check if an element is present in the list, use List.Contains () method. The definition of List.Contains () method is given below. bool List.Contains (int item) If given element is present in the list, then List.Contains () returns True, else, it returns False. Example 1 – Check if Element is in C# List using Contains () bozeman population 2021WebDec 13, 2024 · Using linq, how can I retrieve a list of items where its list of attributes match another list? Take this simple example and pseudo code: List listofGenres = new List () { "action", "comedy" }); var movies = _db.Movies.Where (p => p.Genres.Any () in listofGenres); c# linq Share Follow edited Dec 13, 2024 at 10:41 Luke Girvin bozeman population 2023WebTo check if an element is present in the list, use List.Contains () method. The definition of List.Contains () method is given below. bool List.Contains (int item) If given … bozeman population historyWebJul 1, 2009 · 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 string input = "John,Max,Pete"; List names = input.Split (',').ToList (); customer = customers.FirstOrDefault (cus => names.Contains (cus.FirstName)); Share bozeman population 2022WebJan 14, 2016 · C# Check if List contains a custom object with the same value Ask Question Asked 7 years, 2 months ago Modified 7 years, 2 months ago Viewed 35k times 14 I have a custom object (the properties must be strings): public class Nemesis { public String Dex_ID; public String Value; } gymnastics near reynoldsburg oh bozeman population growth