C# list contains all items in another list

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August undefined, 2024

WebIf 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 predicate with the matching criteria. In your case you might write 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...

c# - LINQ select List where sub-list contains item from another list ...

WebFeb 8, 2014 · I'll suggest: var searchIds = new List {1,2,3,4,5}; var result = persons.Where (p => p.Locations.Any (l => searchIds.Contains (l.Id))); Contains will be translated to IN statement. Keep in mind that the id list goes into the sql statement. If your id list is huge then you'll end up having a huge query. Share. WebYou can check if a list is inside of another list with this var list1 = new List { 1, 2, 3, 4, 6 }; var list2 = new List { 2, 3 }; bool a = list1.Any (c => list2.Contains (c)); Share Improve this answer Follow edited Mar 22, 2024 at 19:18 Abra 18.6k 6 32 41 answered Mar 22, 2024 at 19:05 Pperez 61 1 2 Add a comment 0 boston house medical centre

c# - Check if list contains element that contains a string and get …

WebMar 5, 2016 · 3 Answers. Sorted by: 18. You can just use following LINQ expression: List1.Where (p => p.Cats.Any (c => List2.Any (c2 => c2.ID == c.ID))); You should also be able to do that with intersect (That is if your classes have their Equals methods overriden to check for matching IDs - see Intersect on MSDN ): WebFeb 1, 2009 · As I needed to check if there are items from a list in a (long) string, I ended up with this one: listOfStrings.Any (x => myString.ToUpper ().Contains (x.ToUpper ())); Or in vb.net: listOfStrings.Any (Function (x) myString.ToUpper ().Contains (x.ToUpper ())) Share Follow answered Oct 15, 2024 at 12:26 LiliumCandidum 61 8 Add a comment 2 WebFeb 28, 2024 · The ways to do this is by using a combination of Any and All. You need to check if all the elements of wordsToFind are substring of any elements in StringList bool result = wordsToFind.All (word => currentObject.StringList.Any (str => str.Contains (word)); This is for one object out of the list of Objects. You can again apply All to that list. hawkins brown careers

c# - Check if a string contains an element from a list (of strings ...

c# - how to check if List element contains an item with a …

WebSep 26, 2012 · 5 Answers Sorted by: 15 Your code works but it will create the list of anonymous object, not string type Instead of using (a => new { a.Title }, you just use a => a.Title if you just only want to get the title: var myList = db.Items.Where (item => idsOnly.Contains (item.ID.Value)) .Select (a => a.Title).ToList (); Share Improve this … WebMar 31, 2015 · To see if one list contains the values in another use the List.Intersect [ ^] method and check against the Count Any property. E.g. C#. Expand . private void … hawkins brown embodied carbonWebNov 9, 2011 · Here's a slightly less friendly O (n+m) solution. This should be used if superset is HUGE. It avoids repeatedly enumerating superset. HashSet hashSet = new HashSet (superset); bool contained = subset.All (i => hashSet.Contains (i)); Share Improve this answer Follow edited Jan 2, 2009 at 21:42 answered Jan 2, 2009 at 21:35 … hawkins brown hbert

"WebSep 12, 2013 · @V.7 Because he only wants to know if one item in the list contains a substring. list.equals is not the correct tool for the job [ "abc", "def", "ghi" ] does contain "hi" the way the OP describes it. list.equals doesn't even take the correct datatypes. – " - C# list contains all items in another list

C# list contains all items in another list

Select multiple records based on list of Id

WebMay 30, 2013 · And now result of my measurement. I generated 100 000 UserProfiles and 100 000 ids. Join took 32ms and .Where with .Contains took 2 minutes and 19 seconds! I used pure IEnumerable for this testing to prove my statement. If you use List instead of IEnumerable, .Where and .Contains will be faster. Anyway the difference is significant. WebApr 2, 2013 · c# - Find items from a list which exist in another list - Stack Overflow Find items from a list which exist in another list Ask Question Asked 10 years ago Modified 2 years, 7 months ago Viewed 93k times 53 I have a List PropA { int a; int b; } and another List PropX { int a; int b; }

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WebDec 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 WebDec 12, 2013 · So I have two lists: One of ObjectB (ListObjectB) and Another contains a list of id's of ObjectA (called ListOfIdsA). If this i want to get a list of ObjectB where ObjectB.ListOfObjectA is in the ListOfIdsA. My first (and wrong) approach was ListObjectB.Where (p=> ListOfIdsA.Contains (p.ListOfObjectA.Select (b=>b.Id)))

WebOct 4, 2024 · t2.All (elem => t1.Contains (elem)) called All (=>Contains) I have varied 3 params: count of supersets length of subset variability in items All supersets were random length and contained items in range [0; Variability). Subsets had fixed length and contained items in range [0; Variability). WebSep 5, 2024 · The fastest way time wise is to use HashSet<>, especially for large lists: private List Find (List list1, List list2) { var list2HashSet = list2.Select (x => x.Item).ToHashSet (); return list1.Where (x => !list2HashSet.Contains (x.Item)).ToList (); }

WebMay 21, 2024 · Let's clear up any confusion you have related to the LINQ methods Any(), All() and Contains(). They're extremely useful for querying (asking questions about) your data. I'll first explain how they work at a high level and then give an example of each one. Important: All three of these methods return a boolean (true/false). Your result will ... WebC# 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

Webstring _tags = "sport,football"; List tags = _tags.Split (',').ToList (); var teams = (from t in db.Tags where tags.All (x=> x.Contains (t.TagName)) select t.Teams).FirstOrDefault ().Select (i => i.TeamNames).ToList (); This should help get you the desired result Share Improve this answer Follow answered Mar 18, 2015 at 17:03 shat90

WebApr 13, 2024 · C# : Does .NET have a way to check if List a contains all items in List b?To Access My Live Chat Page, On Google, Search for "hows tech developer connect"So ... hawkins brown hackney wick hawkins brown linkedinWebOct 4, 2009 · Hope it helps ;-) You could also use another way. Override equals and use this. public bool ContainsAll (List a,List check) { list l = new List (check); … boston house medicalWebAug 4, 2013 · 4 Answers Sorted by: 4 This takes each part of ListA and compares it with ListB with SequenceEqual: bool containsSameSequence = ListA .Where ( (item, index) => index <= ListA.Count - ListB.Count) .Select ( (item, index) => ListA.Skip (index).Take (ListB.Count)) .Any (part => part.SequenceEqual (ListB)); Demo hawkins brown irelandWebIf you override the equality of People then you can also use: peopleList2.Except(peopleList1) Except should be significantly faster than the Where(...Any) variant since it can put the second list into a hashtable.Where(...Any) has a runtime of O(peopleList1.Count * peopleList2.Count) whereas variants based on HashSet … hawkins brown jobsWebAug 29, 2013 · The first approach uses a loop: bool isFound = false; foreach (item1 in list1) { if (list2.Contains (item1)) { isFound = true; break; } } The second one uses Linq directly: bool isFound = list1.Intersect (list2).Any (); The first one is long to write and not very straightforward/easy-to-read. boston house musicWebMar 31, 2015 · How to find a string is already present in a list.For example i have a list that contains data now if i want to write the data in to another list during this i want to keep a condition whether the string is already present in the list.I am using the below code but its not working can you kindly help me C# hawkins brown limited