Locking a database row in entity framework

How can I prevent Entity Framework from locking the database?

Just to put this to bed im going to post what my solution was....I was basically looking at this from the wrong end of the problem, a transaction is used when calling ...SaveChanges()... but you can still read the database by using a method like this:...private static FrameEntities GetEntities() { FrameEntities entities = new FrameEntit...

When doing many updates in Entity Framework 4, how do you avoid locking the database?

Those locks are not created by Entity Framework. EF only supports optimistic concurrency, pessimistic locking is not supported with EF....I think the locking you experience is a result of your SQL Server configuration. Perhaps if your Transaction Isolation Level on the server is set to REPEATABLE READ this might cause the locks after each query. Bu...

code first entity framework 4.1 The permission to CREATE DATABASE was refused in the database'master.'

I just ran into this myself. The connection string name must match the class name of your DbContext subclass exactly. If it doesn't EF will not find the connection string and will try and fall back to doing something else (SQL embedded?) which doesn't work on my machine (I have full SQL Server installed).

Row size exceeds the maximum row size of 8060 in Entity Framework.

The only way I can see you getting this error with that table definition is if you have previously had a large fixed width column that has since been dropped....CREATE TABLE [dbo].[Attachments] ( [Id] int IDENTITY(1,1) NOT NULL, [FileName] nvarchar(255) NOT NULL, [Attachment] varbinary(max) NOT NULL, Filler char(8000), Filler2 c...

Entity framework code first - how to run Update-Database for production database

See ...Using Entity Framework (code first) migrations in production... so that your application automatically updates the database when the Entity Framework initializes....Now if you're more comfortable having manual control over the migration, you could use the -Script argument to the Update-Database command on your developer machine to generate S...

How to totally lock a row in Entity Framework

EF doesn't have built-in locking mechanism, you probably would need to use raw query like...using (var scope = new TransactionScope(...)) { using (var context = new YourContext(...)) { var wallet = context.ExecuteStoreQuery<UserWallet>("SELECT UserId, WalletId, Balance FROM UserWallets WITH (UPDLOCK) WHERE ..."); ...

Oracle ODP.Net With Entity Framework 6 - Entity framework database compatible provider could not be found

I finally was able to to use ODP with EF6....I did the following to make it work :-...First Installing ODAC 12c Release 3 which includes support for Entity Framework 6 Code First and Code First Migrations; NuGet, .NET Framework 4.5.2; and ODP.NET, Managed Driver XML DB. As per...http://www.oracle.com/technetwork/topics/dotnet/whatsnew/index.html...

Entity Framework 6 Migrations: How to disable automatic Update-Database on Database initialize?

Migrations also have a Seed method you can override that takes place after the Up() method. You can use the AddOrUpdate command in case data may exist. ...http://www.asp.net/web-api/overview/data/using-web-api-with-entity-framework/part-3

Entity Framework read queries locking all database

If you're downloading a lot of data synchronously it will make the UI freeze up on you. Consider doing this asynchronously. What are you using client side, anyway? ...I'm assuming you're generating an excel file from data in the database and it's just a matter of it being enough data that it takes ~5 seconds to create the file and send it to the u...

Entity Framework 6 DbUpdateConcurrencyException When Adding New Rows To Database

I think I may know what the problem is. ...The EF is not detecting the insert. I think this is because you have an OUTPUT parameter called @Identity but I don't see that being mapped back anywhere:...// Stored Procedure Mapping MapToStoredProcedures(s => s.Insert((i => i.HasName("InsertProduct") .Parameter(p => p.ProductTypeId, "Product...