C# entity framework multiple where

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August undefined, 2024

WebUsing multiple where clauses is very easy to detect and optimize, the place that these sort of libraries have trouble tends to be with deeply nested projections. You can see the SQL produced by your query if you use context.Items .Where (item => item.Number > 0) .Where (item => item.Number < 5) .ToString (); Share Improve this answer Follow WebApr 2, 2013 · The Include is a Eager Loading function, that tells Entity Framework that you want it to include data from other tables. The Include syntax can also be in string. Like this: db.Courses .Include ("Module.Chapter") .Include ("Lab") .Single (x => x.Id == id); But the samples in LinqPad explains this better. Share Improve this answer Follow

JOIN локальной коллекции и DbSet в Entity Framework / Хабр

Web1 day ago · I have default generated .tt template without any edits and so default generated entities. I want to override toString() method for all my entities to build big string with all properties' names and values. WebSo, in this example (with three parameters per line), you can't have more than 700 Locations to filter. Using two items to filter, it will generate 6 parameters in the final SQL. The generated SQL will look like below (formatted to be clearer): exec sp_executesql N' SELECT [Extent1]. [Id] AS [Id], [Extent1]. damages based portal

Entity Framework - async select with where condition

WebMar 26, 2010 · EntityFramework 6 has made this a bit easier with .RemoveRange (). Example: db.People.RemoveRange (db.People.Where (x => x.State == "CA")); db.SaveChanges (); Warning! Do not use this on large datasets! EF pulls all the data into memory, THEN deletes it. Web6 hours ago · I'm trying to do a raw SQL statement which resembles this. DELETE FROM db.T0590_CODE_STRING WHERE IN (1,1,2,3,5) the values in the IN clause are from rowIds list so therefore I'm trying to use a string.Join() but then the values are implemented as a String and not an Integer. WebJul 15, 2024 · var list = new List () {"John", "Adam", "Bill", "David"}; context.People.Where (p=>list.Any (l=>l == p.Name)).ToList (); error message: System.InvalidOperationException: 'The LINQ expression 'DbSet .Where (p => __list_0 .Any (l => l == p.Name))' could not be translated. damages breach of fiduciary duty

Where is MergeOption in Entity Framework 6? - iditect.com

c# - Update Multiple Rows in Entity Framework from a list of ids ...

WebJan 17, 2024 · Этот код не работает в Entity Framework 6 вообще. В Entity Framework Core — работает, но всё будет выполнено на стороне клиента и в случае, когда в базе миллионы записей — это не выход. WebOct 19, 2014 · But now I want to search/filter on multiple words. First I get an array of all separate words. var searchStrings = searchString.ToLower().Split(null); I tried the following but it does not fulfill my requirements listed further down as it returns any user where any word is matched in any field. damages breach of contract nzWeb27. I am trying to delete multiple rows from a table. In regular SQL Server, this would be simple as this: DELETE FROM Table WHERE Table.Column = 'SomeRandomValue' AND Table.Column2 = 'AnotherRandomValue'. In Entity Framework 6, they have introduced RemoveRange () method. However, when I use it, rather than deleting rows using the … birding cape may new jersey

"WebNov 20, 2016 · I'm using ASP.NET Core with Entity Framework. First I select an employee, and then all employees that satisfy a condition (for the purpose of displaying what works): var a = db.Employee.FirstOrDefault (); var b = db.Employee.Where (x => x.FirstName == "Jack"); var c = await db.Employee.FirstOrDefaultAsync (); var d = await … " - C# entity framework multiple where

C# entity framework multiple where

c# - How to store List with checkboxes in Db with Entity ...

Web2 days ago · Not sure if this is best approach, but it does the job. I'm able to store multiple selection in single string and regenerate values back in view. Still learning Asp.net and Entity Framework, so I'm not quite yet there with relations WebJan 17, 2024 · Этот код не работает в Entity Framework 6 вообще. В Entity Framework Core — работает, но всё будет выполнено на стороне клиента и в случае, когда в …

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WebApr 3, 2024 · var column = typeof (TEntity).Name + "ID"; var where = from id in SelectedIds select new WhereSpecifier (column, CheckMethod.Equal, id.ToString ()); return GetTable ().Where (where); Share Improve this answer Follow edited Dec 20, 2024 at 9:02 StepUp 35.6k 14 86 144 answered Apr 8, 2011 at 13:16 tster 17.7k 5 53 71 Add a comment 3 WebNov 4, 2010 · Is there any difference between these two ways of querying the context? Firm firm = base.context.Firms .Where (f => f.SomeId == someId) .Where (f => f.AnotherId == anotherId) .FirstOrDefault (); Firm firm = base.context.Firms .Where (f => f.SomeId == someId && f.AnotherId == anotherId) .FirstOrDefault ();

Web1 day ago · c#; git; entity-framework-6; Share. Follow asked 2 mins ago. Luffy Zhong Luffy Zhong. 1. ... Entity Framework query says column not found for a column I never specified. ... EF Migrations - There is already an object named '' in the database. 0 Cannot create Multiple Ids but yet I only have one. 0 ... WebMay 14, 2024 · For instance, there could be multiple Where, and they could be at any point of the query chain. In your case, you could simply insert Where inside the Join , e.g. .Join (context.app_language.Where (al => al.languagecode = "es"), ... – Ivan Stoev May 14, 2024 at 19:45 Add a comment 2 Answers Sorted by: 20 Like this:

WebIn Entity Framework 6, the MergeOption property has been replaced by the DbChangeTracker.QueryTrackingBehavior property.. The QueryTrackingBehavior … WebSep 5, 2015 · The concept is to search a customer based on the search parameters. User can provide all or few or at least one of the search parameters. But I am quite new in Entity Framework and getting confused on how to do this. I can do this in traditional SQL coding by considering If - Else condition in c# side.

WebOct 14, 2024 · The Find method on DbSet uses the primary key value to attempt to find an entity tracked by the context. If the entity is not found in the context then a query will be sent to the database to find the entity there. Null is returned if the entity is not found in the context or in the database. Find is different from using a query in two ...

WebJun 17, 2024 · Calling Include (u => u.Posts) twice is the right way to do it. From EF Core docs ... emphasis on the last sentence. You may want to include multiple related entities for one of the entities that is being included. For example, when querying Blog s, you include Posts and then want to include both the Author and Tags of the Posts. damages business law definitionWebMay 18, 2024 · SELECT * FROM TABLE WHERE (Field1 = X, Field2 = Y ... ) or (Field3 = Z) In a normal situation I would just do this: Object.Where (c => (c.Field1 == X && c.Field2 == Y) (c.Field3 == Z)) I cannot use this approach because the query is build by using multiple .Where () calls. Having an example: birding caucasusWebFeb 6, 2014 · The IQueryable.ToQueryString method introduced in Entity Framework Core 5.0 may help with this scenario, if you are willing to have some raw SQL appearing in your code. This method will generate SQL that can be included in a raw SQL query to perform a bulk update of records identified by that query. For example: birding center near meWebSep 1, 2024 · C# var query = from b in context.Set () from p in context.Set ().Select (p => b.Url + "=>" + p.Title) select new { b, p }; var query2 = from b in context.Set () from p in context.Set ().Select (p => b.Url + "=>" + p.Title).DefaultIfEmpty () select new { b, p }; SQL SELECT [b]. [BlogId], [b]. [OwnerId], … damages bodily tissue rewriteWebIn Entity Framework 6, the MergeOption property has been replaced by the DbChangeTracker.QueryTrackingBehavior property.. The QueryTrackingBehavior property is an enum that determines how changes to entities are tracked by the DbChangeTracker.It has three possible values: Auto: This is the default behavior.When an entity is retrieved … damages breach of statutory duty damages breach of contractWebAug 8, 2024 · entity is object of my entity framework class. Model.MyProject entity=new Model.Myproject (); and "Customer" is class build in this entity. from which i want to fetch data on the basis of Multiple condition. ViewBag.CustomerList=entity.Customers.Where (i=>i.MobileNumber==12321 && i=>i.Nmae=="abc").firstordefault (); Solution 3 C# damages are extra costs in cicvil law