Entity framework delete by id without loading

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WebAug 15, 2016 · 3 Answers. Sorted by: 7. Of course it can be done: If UserId is primary key: using (DbContext db = new DbContext ()) { Setting settingToRemove = new Setting { UserId = Uid }; db.Entry (settingToRemove).State = EntityState.Deleted; db.SaveChanges (); } If UserId is not the key you have to query database, but what you need is just get primary ... WebYou can use a stub to represent the entity to be deleted and thereby stop the entity from being retrieved from the database: var context = new SampleContext(); var author = new Author { AuthorId = 1 }; context.Remove(author); context.SaveChanges(); The only property that the stub requires is the primary key value.

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WebJun 3, 2015 · 3 Answers. One approach is to overload the RemoveRange method on a DbSet with an expression. To make this as convenient as possible, implement this as a method extension on the DbSet entity itself so that the process is simply overloaded onto the DbSet with the actual RemoveRange method. public static class DataExtensions { … WebDec 1, 2012 · Entity Framework 5, with the Code First approach can do some pretty powerful things without much effort. Create your model classes, and it spins up a brand … inexpensive christmas shower curtains

c# - Deleting an item with entity framework - Stack Overflow

WebNov 5, 2024 · If you have a large data set, you can use Z.EntityFramework.Extensions.EFCore package. context.Customers .Where (x => x.AdvertId == AdvertId) .DeleteFromQuery (); In this way, the query will be executed in the database and you won't need to fetch all data in the local context to perform this operation. WebSep 7, 2011 · 3 Answers. Actually you do not have to load the object from the database, if you want to delete it. Instead, create an ObjectContext, attach your ObjectToDelete to that context via Attach (), then DeleteObject () and SaveChanges (). Thus you would be able to receive an exception about concurrency. WebOverview of Entity Framework Delete by Id. The Entity Framework creates and run the Delete Statement in the database for the entities EntityState is marked as Deleted. To deleting the entity … log into tp link wireless router

c# - Deleting object in Entity Framework by Id - Stack Overflow

Update Multiple Rows in Entity Framework from a list of ids

WebMay 4, 2024 · With this, better statement of the problem, there are two possible solutions when using the Entity Framework. In your Delete method, the existing instance, compare the expected values of the properties, and delete if they are the same. In this case, the Entity Framework will take care of writing a DELETE statement which includes the … WebJul 31, 2015 · Add a comment. 10. Just to convince you that your first code snippet must work here is a simple example you can copy, paste and test: Create a new console application project (.NET 4) Add reference to EntityFramework.dll (EF 4.1) Delete the content of Program.cs and paste in the following: ->. inexpensive christmas party favorsWebFeb 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: inexpensive christmas photo greeting cards

"WebOct 12, 2024 · The naive approach in Entity Framework would be something like this: public async Task Delete (int id) { using var dbContext = new MyDbContext (); var objectToDelete = await dbContext.Objects.FirstAsync (o => o.Id == id); dbContext.Objects.Remove (objectToDelete); await dbContext.SaveChangesAsync (); } … " - Entity framework delete by id without loading

Entity framework delete by id without loading

Enable RemoveRange to remove by predicate on entity

WebTo get the underlying entity object from the proxy object, you can use the Unwrap() method provided by Entity Framework. Here is an example: Here is an example: csharp using System.Data.Entity; // Make sure to include this namespace // Assume that "context" is your DbContext instance and "entity" is the proxy object var underlyingEntity ... WebViewed 15k times. 12. I have the following and looking for a more efficient way of deleting vs looping through the records and then deleting each one at a time (note using Dbset): var wcd = dbContext.ProgramDetails.Where (p => p.Id == Id); foreach (var wc in wcd.ToList ()) { dbContext.ProgramDetails.Remove (wc); } dbContext.SaveChanges (); Also ...

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WebDec 14, 2024 · Strangely, although this is a quite common exception in EF6 and EF Core, neither of them expose publicly a method for programmatically detecting the already tracked entity instance with the same key. WebJul 28, 2015 · There are no changes about how to delete an entity between EF 4 and EF 6. To delete an entity using Entity Framework, you need to use the Remove method on DbSet.Remove works for both existing and newly added entities.. Calling Remove on an entity that has been added but not yet saved to the database will cancel the addition of …

WebAs @Ivan specified, the Remove doesn't save changes directly in the database until you call SaveChanges or SaveChangesAsync. Delete. This feature deletes rows from a database without loading entities in the context. Calling this method may take quite some time depending on the number of rows that will be deleted in the database. Web2 days ago · As mentioned, the IDs are only generated once the SaveChanges() is called. Fortunately, EF will populate the IDs in the entity object references when they are inserted, so the solution is to keep the entity references and get the IDs after saving.

WebDec 3, 2024 · It is easy to check for an unset key when the entity type is known: C#. public static bool IsItNew(Blog blog) => blog.BlogId == 0; However, EF also has a built-in way to do this for any entity type and key type: C#. public static bool IsItNew(DbContext context, object entity) => !context.Entry (entity).IsKeySet; WebNov 3, 2016 · DbContext has methods called Entry and Entry, these methods get a DbEntityEntry for the given entity and provide access to the information about the entity and return a DbEntityEntry object able to perform the action on the entity. Now we can perform the delete operation on the context by just changing the entity state to …

WebMar 8, 2024 · You code doesn't remove the entity though, it attaches a new object with only partial data. When EF tries to save it, it will detect that the data doesn't match and assume there's a concurrency conflict. If you want to avoid loading the entity, don't use EF. Otherwise you have to load the entity and delete it –

inexpensive christmas table centerpiece ideasWebJul 18, 2014 · Introduction. The common way to delete an entity in Entity Framework is to retrieve the entity from the database into the context and then delete it from the context. … inexpensive christmas snow globesWeb4. Cascade delete in Entity framework is tricky thing, as you need to be sure about deletion entity object graph.It is better to always write a integration test for these cascade deletes. If you try to delete parent entity in EF, it will try to execute delete statements for any child entities in current dbcontext. login to track passportWebJan 24, 2024 · Then use DeleteFromQuery () or DeleteFromQueryAsync () method after your query. await _dbContext.MyTable.Where (w => w.TypeId == 5).DeleteFromQueryAsync (); DeleteFromQuery gives you access to directly execute a … inexpensive christmas travel destinationsWebSep 15, 2024 · The Cascade operation is not a part of Entity Framework. It only defines it. The operation itself is performed solely by the database server based on the foreign-key relationship. If your database doesn't define that relationship, there's nothing Entity Framework can do. As for - How to delete related data with no foreign key using Entity ... log into tp link wifi extenderWebDeleteFromQuery gives you access to directly execute a DELETE statement in the database and provide a HUGE performance improvement without select and load objects. Performance Comparisons : Operations : 1,000 Entitie - 2,000 Entities - 5,000 Entities. SaveChange : 1,000 ms - 2,000 ms - 5,000 ms. DeleteFromQuery : 1 ms - 1 ms - 1 ms. … log in to tp routerWebFeb 12, 2024 · Delete without loading from the database. You can delete the entity without loading from the database, provided you know the Primary key value. The following example shows how to delete without loading from the database. We create a new department entity and assign the 2 to DepartmentID. Next, we attach it to the context … log into track and trace account