Entity Framework : How do you refresh the model when the db changes?

change db name in connection string at runtime in Entity Framework

When you create the ObjectContext, you will need to use the constructor overload that takes a ConnectionString as a parameter....You can build this ConnectionString using an ...EntityConnectionStringBuilder.... More specifically, assuming your underlying database is SQL Server, you can use a ...SqlConnectionStringBuilder... to build up the value fo...

Model backing a DB Context has changed; Consider Code First Migrations

In my case this error was caused by the existence of the _MigrationsHistory table in the database. Deleting that table fixed the problem. Not sure how that table got into our test environment database.

EF6 Code first "model backing DataContext has changed" error (.mdf Db)

By default EF6 code first will not recreate your database. It says so in the exception. It also comes with the solution to your problem. You need to use Code First Migrations...Open your PackageManager Console and type in the following...Enable-Migrations ...Add-Migration {Name} (this will create a class with the changes For the first I always use...

Add stored procedure to entity framework model (.edmx) without refreshing existing entities

Why don't you update your edmx from the development database server? If that's not an option, you can create an intermediary between development and production to hold your new stored proc. For example, you could create a new database project based on the schema of your production database, add your new stored proc, then deploy the database project...

How to add new entity properties in Entity Framework without changing database model

A better approach...Although this can be easily done with Entity Framework, but as pointed out by other answers here, and I acknowledge 100%, that it is better to separate presentation/UI models from database models by creating ViewModel separate from your regular entities and put your calculated properties there....If you are stuck with EF, keep r...

DB default value ignored when creating Entity Framework model

Try this:...StoreGeneratedPattern = Calculated ...Edit: ...Sorry for the one-code-line answer but I really was in a hurry last day....To make EF set a property’s db default value, the fastest way is to open your .edmx designer, click on the interested field and set ...StoreGeneratedPattern = Calculated ...In its properties (you can see this prope...

Entity Framework not saving changes to a Local DB

Because your localdb is copied to bin folder every time you run it. It gets overwritten everytime you run/debug it. Main file in the project folder is not updated. For detailed answer: ...https://social.msdn.microsoft.com/Forums/en-US/393bddc6-0b85-4c27-9475-27172e50d2d9/entity-framework-doesnt-save-new-record-into-database?forum=adodotnetentityfra...

Dynamically Instantiate Model object in Entity Framework DB first by passing type as parameter

You can use a ...Dictionary.... Maybe you want something like this:...// Input Param string tableName = "TblStudents"; Dictionary<string, Type> myDictionary = new Dictionary<string, Type>() { { "TblStudents", typeof(TblStudent) }, { "TblTeachers", typeof(TblTeacher) } }; // Context always same DBContext dbContext = new DBContext(); DbSet d...

Entity Framework DB updating but DB context not showing updates

Thanks to both Eric J and DevilSuichiro for helping me resolve my issue. The problem was that I should not have been trying to use the same DB context. By retrieving a new DB context instead of trying to reuse the same DB context I was able to verify my test results....Many thanks again.

Need to refresh the Db Entity that has been updated in another scope

You can do the following:...Get a list of ...added/modified... entities...Perform ...SaveChanges()...Detach the ...added/modified... entities from your context....Here is an example to do this by using ...ObjectContext...:...IEnumerable<object> entitiesCollection = from e in objectContext.ObjectStateManager.GetObjectStateEntries ...