Linq order by string. Detailed solutions provided.


Linq order by string. ToList() This cuts off the L1 setting from each row and uses Distinct to make sure you only get each of them back once. Unfortunately, the method included only works on IQueryable<T>. Mar 23, 2012 · This is one of the most common question you got when you show LINQ to Entities or LINQ to Nhibernate to people that are not used to LINQ: How can I order by a property if I have the name of the property expressed as String? I’ve blogged in the past how you can do dynamic sorting and pagination in Entity Framework, but that solution uses ESQL, a dialect to query EF that is similar to Apr 15, 2017 · I'm trying to sort an array of numbers that are strings and I'd like them to sort numerically. But what about when you don’t have a strongly typed object at runtime and you only have the property’s name? Mar 27, 2014 · The ". Use Expression<Func<T,TProp>> instead. Parse(x)); return dates. That comparer is not necessarily going to return a sort order based on the ASCII code. Generic; namespace Jun 10, 2015 · I'm trying to sort a List&lt;string&gt; that contains a list of elements that are each numbers followed by letters. Feb 6, 2025 · Sort strings, length In C# programs, strings can be sorted based on their lengths. This article contains several examples you can use or modify to suit your needs. This makes it simple to sort based on string length, or a property value in any object type. According to the ASCII table, the strings I'm interested are: A = 65 _ = 95 a = 97 So I would expect the output to be A, _, a However I tried all the StringComparer variations, none of them give me the desired output. ToArray(); However, this will cause the data stored in the other arrays to loose any meaningful correlation to the name array (e. Items &amp;&amp; t. g. In this tutorial, you'll learn how to use LINQ OrderBy() method to sort the elements of a sequence in ascending order. NET Controls. Get around needing strongly typed order by clauses. Length)); foreach (string s in arr) { } This is more efficient than OrderBy as it will sort the elements of the array in place rather than creating a new collection to enumerate. Detailed solutions provided. Func, System. But inside this extension the string will be parsed to Lambda. Items where !t. To order data in EF Core a developer uses OrderBy and OrderByDescending extension methods which accept a column to order data. OrderBy("Name, Age DESC")) for ordering. Length. why not create an actual class for each "row" with the correct Let’s make an example in C# of displaying a sequence of strings in the standard order supported by the OrderBy() LINQ extension to enumerable collections. The examples in this topic use the Contact, Address, Product, SalesOrderHeader, and SalesOrderDetail tables Sep 13, 2013 · I don't state that this is a good example of the IComparer implementation (it probably needs to do null checking and handle if both strings are empty), but the point of the answer is to demonstrate the OrderBy overload and at the very least works with the question's sample data. Use Expression tree classes and build your own OrderBy lambda 2. Order on a. entity-framework needs the expression tree of the query in order to translate it to SQL commands. For example: A BB CCC DDDD EEEEE FFFFFF would get sorted as: FF Jun 3, 2022 · List<string> allperiods = new List<string>(); allperiods = lstperiods. IComparer)' cannot be inferred from the usage. Nov 21, 2008 · Learn how to use a generic extension method to apply OrderBy on an IQueryable using a string column name in C#. Split(delimiter, 2)[0]). CompareTo(y. Oct 22, 2021 · Notifications You must be signed in to change notification settings Fork 5. ToList<string>(); What happens is that my records are ordered alphabeticaly, is there a Linq keyword I can use so my records are ordered correctly (so order 30 comes before order 100)? Don't throw away the return value. To avoid this, I'd strongly recommend using a class to store this information: class MyClass // TODO Nov 28, 2012 · Say I have a method definition as such: public CustomerOrderData[] GetCustomerOrderData(string[] CustomerIDs) { var query = (from a in db. If you want something that works with both ascending and descending order, you'd have to sort in two steps: troubletickets To sort by a dynamic (runtime) column name, you have a few choices: 1. There's no need to use GroupBy unless you want to get aggregate information about each L1 setting (for example, if Nov 29, 2023 · LINQ In the System. Use Dynamic LINQ and use a string OrderBy. This can lead to repetitive code and reduced code readability when we need to dynamically determine the sorting order based on conditions. Hi Paul I think the issue is in a type of property value, please, provide a type of property value, "string" for example: fileList = currFolder. What I wanted to do is order it by the numbers (numeric order) followed by the words (alphabetical order) My list does not c Using non-lambda, query-syntax LINQ, you can do this: var movies = from row in _db. String)' method, and this method cannot be translated into a store expression. Example We can sort strings by the Length property. Jul 28, 2023 · The Limitation of Default LINQ Sorting: By default, LINQ provides separate methods for ordering data in ascending (OrderBy) and descending (OrderByDescending) order. It's an awesome little library that allows you to dynamically generate LINQ expressions from strings, which is perfect for things like sorting collections by object property names passed as querystring parameters to web api controllers, it even allows you to sort by child object May 24, 2011 · OrderBy Column Name as String using Linq C# . There are 5 different types of sorting operators are available in LINQ: OrderBy OrderByDescending ThenBy ThenByDescending Reverse OrderBy Operator OrderBy operator is used to rearranging the elements of the given sequence in ascending order. Apr 2, 2020 · 2 April 2020 A better way to do dynamic OrderBy () in C# A common feature in various applications is to sort some collection by one of it’s properties, dependent on some input like the column clicked by the user. The sorting is performed by the default comparer for the type of the element. May 10, 2016 · Here we’ll create our own simplified extension method that allows you to order an IQueryable by a string using a similar method to Dynamic LINQ. Mar 30, 2024 · In a query expression, the orderby clause causes the returned sequence or subsequence (group) to be sorted in either ascending or descending order. So I thought it would work if we will parse Lambda to string and give it to OrderBy method. Also, make sure that OrderBy is after any operations (e. Name select row; C# Linq example on how to use the Orderby method to order a list of strings in ascending order. var files = new List<string> Jun 4, 2023 · In this article, learn how to order data returned from a database using Microsoft Entity Framework Core (EF Core). Apr 25, 2024 · Learn to query dynamically depending on run-time state, by varying either LINQ method calls or the expression trees passed into those methods. . To order a sequence by the values of the elements themselves, specify the identity function (x => x in C# or Function(x) x in Visual Basic) for keySelector. C# Linq example on how to use the Orderby method to order a list of strings in ascending order. Dynamic). Linq. orderBy(s=>s. NET, works similarly to the OrderBy method but in reverse order. UserProfile. Happy coding! Apr 1, 2023 · C# program to sort a list of strings using the LINQ OrderBy () method The source code to sort a list of string names using the Linq OrderBy () method, is given below. Introduction In order to sort a list of entities in an ascending order with LINQ, we use the OrderBy method. order_no. Conclusion Sorting data with LINQ is both powerful and expressive. Linq namespace in . LINQを使って3段階で処理をしています。 最初のSelectメソッドで、listから得られた名称（Name）に加えて、名称中の数値部分（Index）という値の2つを保持した匿名クラスを作ります。 Oct 23, 2010 · I want to sort a list in C#. Whether you’re working with simple data types or complex objects, LINQ provides the flexibility to sort by one or multiple criteria in either ascending or descending order. Within a view, I have a list on my viewmodel for which I would like to display those objects which are not "snoozed" first and then ordered by whether or not their title contains the word "order". I finally came to a solution that I think is clean enough and wanted to share it with whom it I found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a SQL-like string (e. You will see the query syntax, which Jul 23, 2025 · Given a list of integers, now our task is to sort the given list of integers. Mar 31, 2023 · Var names=obj_name. The code then looks something like this: static member OrderBy : System. a User class, so the order we got the items in was the same order that they were added to the list Jul 16, 2014 · I stumbled across the Dynamic LINQ Library today and can't figure out why more people aren't talking about it. May 13, 2019 · LINQ - Convert String to Datetime Order By Asked 6 years, 3 months ago Modified 6 years, 3 months ago Viewed 3k times Jul 11, 2025 · In LINQ, sorting operators are used to rearrange the given sequence in ascending or descending order based on one or more attributes. --- Btw. Please add dynamic-linq tag and update the question accordingly. Unfortunately, this method does not accept a string value with the column name. name[3] most likely will not match up with contact[3]). Enumarable and System. '}; settings. Are any way to do this in C# LINQ? When should you use the Linq OrderByDescending Method in C#? What is the Linq OrderByDescending Method in C#? The OrderByDescending method in LINQ is used to sort elements of a collection in descending order based on a specified key. And it works! Jan 18, 2019 · Linq OrderBy Extension using a string and boolean value to determine if should sort ascending or descending. Try: newView = newView. The FillDataSet method used in these examples is specified in Loading Data Into a DataSet. Then, we sort the data in ascending order using the LINQ OrderBy method using both Method and Query Syntax using C# language. OrderBy" function utilizes the default comparer for a string. For a list of all the different string comparers, see the article on MSDN. Linq; using System. Then you'd I'm having a strange issue trying to order a list based on whether or not it contains a particular string value. IsNumeric(string) function just return 0 if string is not a number or 1 it is. It’s nowhere near as complete as Dynamic LINQ but it’s enough to demonstrate the idea behind the magic. The catch is that I cannot convert the numbers into int. When you store those column values, just use the given format string, and sorting should work. Jan 18, 2019 · Linq OrderBy Extension using a string and boolean value to determine if should sort ascending or descending. Feb 9, 2018 · Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges, I found this answer helpful while trying to order paged data from SQL where the SQL table contained a Id value for an enumeration but I needed to sort by the text value of the enumeration. We have used lists of objects, either numeric or based on e. We can even group together elements in a certain way. Your LINQ query can be changed to this for it to work: You almost had it right: troubletickets. Enumerable. You can also specify a custom comparer Sep 23, 2013 · You can use this to sort the name array (which is stored at data[0]): data[0] = data[0]. LINQ OrderBy Method with Value Data Type in C# Let us see an example of how the LINQ OrderBy Method works with Value Data Type in C#. RequiresDynamicCode ("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. ToString() + '-' + obj. Here is the code: string[] things= new string That is because the default ordering for string is standard alpha numeric dictionary (lexicographic) ordering, and ABC11 will come before ABC2 because ordering always proceeds from left to right. Two methods are defined to extend the type IOrderedEnumerable<TElement>, which is the return type of this method. You can define the function outside the OrderBy() clause: Func<Item, Object> orderByFunc = null; You can then assign it to different values depending on the sort To order a sequence by the values of the elements themselves, specify the identity function (x => x in C# or Function(x) x in Visual Basic) for keySelector. Using non-lambda, query-syntax LINQ, you can do this: var movies = from row in _db. Aug 13, 2025 · Learn about sort operations and the standard query operator methods that perform sort operations in LINQ in C#. OrderByDesc(x => x); Another way would be to implement custom sorting function, see this link. This method is used to sort the elements in the collection in ascending order. ConvertAll(dateStrings, x => DateTime. Multiple keys can be specified in order to perform one or more secondary sort operations. Is there a way to use that string directly as a property of the linq query, without having to use conditional logic (if/else, switch) to map the strings to properties. You'll need to parse the ShortTitle to give you the (I'm assuming) int value at the end, and sort by that. May 4, 2018 · The type arguments for method 'System. An implementation might take a string or enum for the column plus a bool or enum for ascending vs. Movies orderby row. Dynamic allows us to set string value in OrderBy method. PageNumber, page. The list generate 11 I'm trying to sort strings ("A", "_", "a") using LINQ in C# in ASCII order while ignoring case sensitivity. CustomerID Dec 21, 2017 · linq - list of string - order by letter only, and then by numbers Asked 7 years, 10 months ago Modified 7 years, 10 months ago Viewed 3k times Apr 19, 2013 · Linq OrderBy string Asked 12 years, 2 months ago Modified 12 years, 1 month ago Viewed 10k times No problem — Linq’s IEnumerable. IOrderedQueryable<'Source> [<System. Aug 4, 2017 · No, the OrderBy can stay the same (you are just "selecting" the field to order by, right?). Aug 22, 2013 · If the column needs to be converted to a string in order to be applied to a filter on a result set, this is the only way I found in LINQ to perform the operation. GetPropertyValue<string>(sortbyoption)); GetPropertyValue () - returns an object type, that is hard to compare and sort Thanks, Alex Jul 11, 2025 · In LINQ, sorting operators are used to rearrange the given sequence in ascending or descending order based on one or more attributes. Select(x => x. Order would be either "asc" or "desc" Using EF Core, conditionally sorting the resulting request has been easy but making it cleaner wasn't so much. ID. Net Dynamic Sorting of Anonymous Types If you’re familiar with Linq, you have undoubtedly used the popular “OrderBy” extension method. 2k Sep 1, 2023 · Here we use the LINQ orderby keyword to sort a List by any property. OrderBy(l => l). name); The order_by method supports any data type; we can use integer, string, character, decimal, and so on. a User class, so the order we got the items in was the same order that they were added to the list Sorting data: the OrderBy () & ThenBy () methods So, now that we have learned through the previous article how to get data from the data source with LINQ and filter it with the Where () method, the next step could be to sort the data. IEnumerable, System. Sep 30, 2014 · b) option is wrong. Enumerable. Now I want to use LINQ to create sorted list depending on this parameter. We can effectively sort strings by their Length property. Nov 20, 2013 · Since arr is an array, you can use the convenient Array. Sep 1, 2011 · return new StaticPagedList<T>(results, page. The default sort order is ascending. Jul 23, 2025 · Given a list of string names, now our task is to sort the names given in the list using the OrderBy () method of LINQ. Substring(0, 4) : x. LINQ order by null column where order is ascending and nulls should be last Asked 14 years, 4 months ago Modified 2 years, 8 months ago Viewed 156k times Apr 25, 2024 · You can query a string as a sequence of characters in LINQ. FirstName != null ? t. Order Method In this article Definition Overloads Order<T> (IEnumerable<T>) Order<T> (IEnumerable<T>, IComparer<T>) Definition May 7, 2012 · If all you want is the level one settings, the correct query would be var delimiter = new[] {'. OrderBy (System. Linq namespace, we find many extensions to the C# language. Distinct(). LINQ to Entities does not recognize the method 'Int32 ToInt32 (System. Diagnostics. OrderByDescending(t => t. Distinct) which will ruin ordering. I have a LINQ query that I want to order by the most recently created date. and The Absolutely Awesome jQuery CookBook. These enhancements include support for query expressions, and extension methods. Sorting data: the OrderBy () & ThenBy () methods So, now that we have learned through the previous article how to get data from the data source with LINQ and filter it with the Where () method, the next step could be to sort the data. You shouldn't use string representations of data - we're all living in object-oriented world :) Best way would be to convert these strings into actual DateTime objects and sort them in reverse order via linq: var dates = Array. Mar 28, 2013 · I have a list of strings, and these strings contain numbers and words. Convert. In this tutorial, you'll learn how to use the LINQ OrderByDescending() method to sort elements of a sequence in descending order based on a specified key. linq orderby using property name string Asked 9 years, 9 months ago Modified 6 years, 6 months ago Viewed 7k times Jul 23, 2025 · Given a list of string names, now our task is to sort the names given in the list using the OrderBy () method of LINQ. ToString(). OrderBy(x => (x. Jun 27, 2016 · I guess by "string version" you mean the so called "Dynamic LINQ" (or System. Aug 18, 2015 · This will not translate to sql order by, if we use linq to entities, because linq to entities requires the expression tree for it. OrderBy(x => x. OrderBy(x => PadNumbers(x)); where PadNumbers could be defined as: public Aug 12, 2015 · Note that OrderBy is an extension method and has implemented in both System. ToString Jun 12, 2009 · I encountered the issue of general natural sorting and blogged the solution here: Natural Sort Compare with Linq OrderBy () public class NaturalSortComparer<T Dec 3, 2016 · I've been working on ordering of object which need to be done on the string which has integer value like "1","2". order_no select obj. Sorting as a string isn't suitable because the values aren't all the same length and it would order them like this: 1, 10, 11, 2, 3. How orderby works in LINQ? The LINQ_OrderBy operator is mainly used to rearrange the collection of elements in the sequence in ascending order. viewed); There is no reason why that won't work, assuming the viewed value is correct. He has also authored two Books - 51 Recipes using jQuery with ASP. It’s part of the System. Dec 6, 2011 · Linq Order by when column name is dynamic and pass as a string to a function Asked 13 years, 8 months ago Modified 3 years, 2 months ago Viewed 9k times In this tutorial, you will learn how to sort data in EF Core using the OrderBy, ThenBy, OrderByDescending, and ThenByDescending() methods. CodeAnalysis. descending. Is there any way to get this functionality on IEnumerable<T>? May 25, 2012 · The Query: return (from obj in context. Customer join b in db. How can I change the LINQ query in the code below to sort by date in descending order (latest first, earliest last)? using System; using System. table_orders orderby obj. ToList(); // {1, 4, 12, 200, 900, 8000} Note: we use the ToList method in Sep 15, 2021 · The examples in this topic demonstrate how to use the OrderBy, OrderByDescending, Reverse, and ThenByDescending methods to query a DataSet and order the results using the query expression syntax. Sort(arr, (x, y) => x. Empty); string. I got then this: var ascendingQuery = from data in data May 30, 2022 · A few additional rules where implicit: Sorting. This operator by May 4, 2023 · Sorting a list of string names is a common task in programming, and the LINQ OrderBy () method in C# provides an easy and efficient way to do so. In this article, we will walk you through a C# program to sort a list of string names using the LINQ OrderBy () method. This method is overloaded in two different ways: I have a method which is given the parameter "bool sortAscending". Query example To begin, this example introduces a query expression OrderBy - Comparer This C# example uses the LINQ OrderBy method with a dynamic expression and a custom comparer to do a case-insensitive sort of the words in an array. IQueryable<'Source> * System. Contains("FY") ? x. order_description). In the below example, we have a collection of integer data. He is the Chief Editor of a Developer Magazine called DNC Magazine. OrderBy The OrderBy method allows you to sort a list of elements in an ascending order. ToInt32 doesn't work either. This method doesn't need to be fast, but it should not create problems or ever give incorrect output. PageSize, total); } Explanation System. PropertyName was the name of one of the property of SomeDto (the equivalent of a nameof on them) Sorting. So we use the OrderBy () method of LINQ. Sort method: Array. There are 5 different types of sorting operators are available in LINQ: OrderBy OrderByDescending ThenBy ThenByDescending Reverse OrderByDescending Operator OrderByDescending operator is used to rearranging the elements of the given sequence in descending order Aug 8, 2024 · LINQ translates this query into SQL, ensuring efficient execution. Children. DeliverySelection Nov 28, 2012 · I try to make my custom orderby extension method, i successfully worked my code but in addition i want to list null or empty or zero values last in result, anyone can help me about that issue ? He Feb 26, 2020 · OrderBy uses an IComparer to compare entries and order them properly. We can use LINQ's Order, OrderDescending, OrderBy, and OrderByDescending methods to order data. Name select row; [EDIT to address comment] To control the sort order, use the keywords ascending (which is the default and therefore not particularly useful) or descending, like so: var movies = from row in _db. Expressions. The question is, how that dictionary for the DateTime columns is filled (when you (hopefully) still have the actual DateTime values). To do a conversion in linq to entities you just need to create your own mssql function and add it to EF, then you are able to use it in your linq to entities query. Follow him on twitter @ suprotimagarwal. You are sorting always by 0 and 1 in your example. We put the shortest string first and the longest string last. Examples Simple usage List<int> list = new List<int> { 8000, 12, 900, 4, 1, 200}; List<int> values = list. Empty will always be the lowest string, so it will end up last in an OrderByDescending. Category, row. May 11, 2014 · I'm trying to get a list of string ordered such that the longest are on either end of the list and the shortest are in the middle. It is possible to specify a custom implementation as the second argument for the OrderBy method. UserProfile != null && t. Jul 23, 2012 · It's because you are sorting them as strings, and for strings 11 comes before 2. Example, using Microsoft NorthWind sample database return customers with several inner joins and a descending order on a navigation column ContactTitle. If you are using plain LINQ-to-objects and don't want to take a dependency on an external library it is not hard to achieve what you want. So we use the Queryable implementation. Like where structure property AVC goes to true then show them first then AVC goes to false. OrderBy () to the rescue. OrderBy(x => x). Jan 23, 2024 · Language-Integrated Query (LINQ) is a domain-specific language for querying data from various data sources, including arrays, lists, XML files, or databases. But LINQ OrderBy or SOrt inplace itself not ordering correctly : Following code can Jan 25, 2019 · I have this List<string>: IList<string> ListaServizi = new List<string> (); How can I order it alphabetically and ascending? Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. SqlFunctions. There are 5 different types of sorting operators are available in LINQ: OrderBy OrderByDescending ThenBy ThenByDescending Reverse OrderByDescending Operator OrderByDescending operator is used to rearranging the elements of the given sequence in descending order Hi Paul I think the issue is in a type of property value, please, provide a type of property value, "string" for example: fileList = currFolder. Collections. Expression<Func<'Source, 'Key>> -> System. This is why each element can not simply be converted to an int. I tried: var itemList = from t in ctn. The given program is compiled and executed successfully on Microsoft Visual Studio. They will choose the "order by" property in the UI - as a string value of course. The first one is for linq-to-objects and the latter is for linq-to-entities. To get what you want, you need to pad the numeric portion in your order by clause, something like: var result = partNumbers. The OrderBy extension method is does not mutate the input. FirstName : string. Category descending, row. Generic. Queryable classes. The OrderBy() clause accepts a Func<TSource, TKey> that gets a sort key from a source element. With query expressions, we can search or sort a collection with just a few keywords, directly in the C# program. rgz1 uxqfds nvrsx gsrjh5 bzuvs j56k jqdb4k 7hhy3o 5n9csy5 iui