Linq select max value May 21, 2019 · In LINQ, you can find the maximum element of the given sequence by using Max() function. Thanks! Code:. OrderByDescending(i => i. Max(); May 20, 2014 · Well if you really like query expressions, you can express the "filter and projection" and then use the Max extension method:. FirstOrDefault(); I am trying to select MAX LevelId value for a user and then assign that value to a variable. It does not support query syntax in C#, but it supports in VB. Date). Gets maximal number from list of integer numbers. Dim query = _ From value In dt. var query = from p in ctx. 1) Using the LINQ Max() method to find the maximum value in an array of integers You can use the DataSet Extensions for Linq to query a datatable. FormControls where p. release_number) . Basically I want to select the row that has the highest BreadCrumbID WHERE ProjectID = 49. OrderByDescending(t=>t. It’s part of the System. Max()); SELECT id, name, password FROM users u WHERE u. Dec 18, 2009 · Don't know if this is Linq to SQL, but if it is, you could alternatively accomplish via a rank() function in SQL (rank each group by date, then select the first ranked row from each), then call this as a stored proc from LINQ. id = (SELECT MAX(u1. The following query should help. Sort). Get maximums of list using Linq? Hot Network Questions Max (LINQ) Enumerable. Use the DefaultIfEmpty() method with the Max() method to specify a default maximum value if the sequence is empty. var q = from n in table group n by n. Linq query to get the list filtered by max value in one query. Status) select u What is the LINQ Max Method? The LINQ Max method is used to find the maximum value in a collection. DefaultIfEmpty(). Max (this System. Value) select new {min, max}). Here's the query I have right now that would select all rows WHERE ProjectID = 49. It returns maximal value of numeric collection. Users'. If the list has no records, then null is returned. Id)) select u; But I always end with the following exception: Unable to create a constant value of type 'Bla. Can I do this with Linq? How? It's O(n) unlike the previous accepted answer which finds the maximum value on every iteration (making it O(n^2)) The ordering solution is O(n log n) Taking the Max value and then finding the first element with that value is O(n), but iterates over the sequence twice. AgeGrade) . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Dec 3, 2010 · Select Max value from sublist with LINQ. Max is extension method from System. This method provides the maximum element of the given set of values. Modified 14 years, 1 month ago. Collections. 3. Select(i => i. 2. LINQ Max() in the list inside the list. PageModules. Nov 25, 2008 · I have a table User which has an identity column UserID, now what is the correct Linq to Entity line of code that would return me the max UserID? I've tried: using (MyDBEntities db = new MyDBEntities()) { var User = db. GroupBy(i => i. I'm answering assuming you actually meant to group by id2 rather than id1, and you actually wanted the results of 12 and 87 rather than 6 and 87. source is null. Viewed 4k times 2 . AccountId into g select g. LINQ Max() method examples. Key, grp. I want to select the row that has the highest BreadCrumbID. MoreLINQ does with its MaxBy operator, but that can't be translated into SQL of course. Where possible, you should use LINQ in a single-pass fashion. Max(); Oct 29, 2010 · I could find only this one which produces somewhat clean sql still not really effective comparing to select min(val), max(val) from table: var r = (from min in items. Mar 4, 2012 · Linq to dataset select row based on max value of column. Select(t => t. Use the LINQ Max() method to find the maximum value in a sequence. Generic. Max(); return user. Key, Date = g. Feb 2, 2012 · I need to select the one row from my table with the maximum value in one field. FirstOrDefault(); List<MasterRecordResultClaim> records = new List<MasterRecordResultClaim>(); foreach (var bestresult in bests Feb 22, 2012 · Unfortunately LINQ doesn't provide a "max by an attribute" method. Max(t=>t. Linq namespace can be used with arrays, lists, or any type that implements IEnumerable<T>. Where(t => t. In plain SQL the equivalent is: SELECT MAX(LevelID) AS MaxLevel FROM Character WHERE (UserId = 'John') //Check User existing Characters max level per user int UserLevelID = 0; Jan 21, 2009 · I felt myself intrigued and tested the performance of PJ7's proposal with that of the extension method. Max() on a property of all objects in a collection and return the object with maximum value Oct 1, 2008 · Building upon the above, I wanted to get the best result in each group into a list of the same type as the original list: var bests = from x in origRecords group x by x. I think that's an approch that is becoming more idiomatic as people hit the bounderies of LINQ2SQL Mar 7, 2014 · If you want to get min and max values from object list (and you dont want to group by property) than you could use this linq: SQL to Linq --> select max and min. The following code example demonstrates how to use Max<TSource,TResult>(IQueryable<TSource>, Expression<Func<TSource,TResult>>) to determine the maximum value in a sequence of projected values. OrderBy(i => i. CompareTo(other. The task was to find the index of the max element (standard string comparison) in a list of random strings (8 to 32 characters long). AsEnumerable() _ Select value(Of Double)("ColumnName"). 0. Let’s take some examples of using the LINQ Max() method. Linq namespace. A value of type Nullable<Int32> in C# or Nullable(Of Int32) in Visual Basic that corresponds to the maximum value in the sequence. I can manage to get the highest value of the Height value but not the object itself. Key select g. PageId == id). Max(u => u. Ask Question Asked 14 years, 1 month ago. Linq query to select rows where a column is a max value. DefaultIfEmpty checks for null and returns the default value of the column data type when the column is null. EventDescriptionGenderView into g orderby g. public struct Money : IComparable<Money> { public Money(decimal value) : this() { Value = value; } public decimal Value { get; private set; } public int CompareTo(Money other) { return Value. var table = new Table { new Row(id: 1, status: 10), new Row(id: 2, status: 20) } from u in table group u by 1 into g where u. IEnumerable<int?> source); A sequence of nullable Int32 values to determine the maximum value of. Status == g. year). How to write a LINQ query that How to use LINQ to select object with minimum or maximum property value 362 How to perform . Id == (context. var max = db. OrderByDescending(z => z. Date)}; If you want the whole record: var q = from n in table group n by n. SELECT Key,MAX(SomeField) FROM SomeTable GROUP BY Key All other answers show how to do this, eg : list . UserID; } but Last and Max don't seem to be supported. NET. Select(grp => new {grp. Max(u1 => u1. Aug 14, 2014 · Linq using max to select a single value. another way is to use Implementing IComparable. Users. It is available in both Enumerable and Queryable classes in C#. Value); } } Feb 18, 2011 · We have a list of modules for a page and want to get the maximum value of the column "Sort". So if this is a LINQ to SQL (or whatever) query, you'll need a different approach. Find a value from Datatable compare with its max() value - LINQ Query. Max for Numeric Types. id) FROM users u1); My Linq is: var dbUsers = from u in context. Was this tutorial helpful ? I want to find and return the object in the list which has the largest Height property value. Value) from max in items. Max(); Mar 7, 2014 · If you want to get min and max values from object list (and you dont want to group by property) than you could use this linq: SQL to Linq --> select max and min. FormObjectsId == FormID select p. ID; var maxID = query. If it's already LINQ to Objects, however: Jun 7, 2022 · To get a maximum value in a specific grouping in SQL you use the GROUP BY clause to specify the grouping, then select the maximum value in that group. Last(); // or var User = db. LINQ/DataTable group by multiple May 27, 2009 · IF you want to select object with minimum or maximum property value. Users where u. May 20, 2014 · Well if you really like query expressions, you can express the "filter and projection" and then use the Max extension method:. AccountId into g select new {AccountId = g. Apr 8, 2013 · Original answer (Grouping by id2, taking the maximum value). First(); the sql is Max ( this IEnumerable<T?> source Func<TSource,TResult> selector ); Code language: C# (cs) The selector is a transform function that applies to each element of the source sequence. Jan 19, 2014 · In SQL it would be a MAX() function but not sure how to do the equivalent in LINQ. Max(); If you don't now in which column will hold the maximum you could use: (C#) Select List<T> item with max value using LINQ query. 1. xaha aai ymiv qxqg wxupd vljqkr fvgx qzszky kkhpk guhm