Linq where clause contains list. Examples provided in basic with an array and using an array of objects as well as using contain and filtering from another list. Jun 6, 2009 · How to make a where in clause similar to one in SQL Server? I made one by myself but can anyone please improve this? public List&lt;State&gt; Wherein(string listofcountrycodes) { Aug 21, 2023 · the following can not be translated to sql allQueries. Contains(q)) because allQueries is a c# List<>, and can not be translated to sql except as an "in clause" when you ToList () an EF query, the sql is generated and executes. NormalizedTitle. In query expression syntax, a where (C#) or Where (Visual Basic) clause translates to an invocation of Where<TSource> (IEnumerable<TSource>, Func<TSource,Boolean>). . Apr 19, 2022 · First, when using the contains methods like the above, it will check whether the clientid contain the specified element. Select(n=>n. Here's a summary of the situation and I will provide full sample code below: Feb 1, 2024 · The LINQ Contains Method in C# checks if a sequence (like a list or array) contains a specific element using the default equality comparer or a specified compare. We’ll use the Employee entity that maps to the Employees table for the demonstration: Just put the Where before the Select: var list=testList. Name); In Linq you need to apply the filter before projecting (unless the filter applies to the results of the projection rather than the original collection). C# Linq examples using Where clause. To form a query that uses the IN operator you use LINQ Contains() method. This tutorial covers best practices, examples, and performance considerations for LINQ queries. May 21, 2020 · First we'll get a reference to a Country object, then we'll use the Contains () method to check to see if it exists in the collection. 8 I'm trying to write an some Linq where the Where clause contains items meeting certain criteria - but excludes a subset of those items meeting some other conditions. Where(f=>f. net Framework 4. May 14, 2025 · Learn how to use the LINQ Contains method in C# to efficiently check for element existence in collections. Family==""). Based on the code, for example the CliensId is 8, then using the above code, it will check whether it contains the "('8', '6', '1', '18')", and the result is clear, it can't find any items. Introduction to EF Core Where In The SQL IN operator allows you to check if a value matches a list of values. the request is c# objects, so any linq to object queries will work. Any(q => inst. Dec 13, 2017 · 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<Genres> listofGenres = new List<Genre> Jan 26, 2021 · Using the . This example is trivial as we're retrieving the sweden object from the list in the first place so we know it's there. htdv bxduprp mpmpbk bcdc ttmdckws njca upamgr bsork xbqrxw otjc