Filter Data using EntityDataSource
I use EF 4, C# and MS Membership Provider.
entity-framework
Is it safe to use one Entity Framework Context per thread? … yes? how?
Probably these are two questions in one, I am using one EF context per request, but I want to use one per thread, because I am going to make some complex task in another thread during the request.
How to manually update Entity framework Code first model so that it updates a database (with a new column)?
can somebody tell me how I can add a data member (col) to my mvc3 model (class) and have it update the database without having to generate everything from scratch? I’m working from code first. When I change my model then run my project I get an error stating that model has changed. Any clean and easy way to synch creating a new col/data mamber with the db/model?
asp.net CORE Migrations generated empty
I’m trying to follow a tutorial to add a migration(a second one) generated from IdentityDbContext and IdentityUser .
When I run dotnet ef migration add <NAME> it being add, but UP and DOWN are empty.
Linq join on two values
Suppose I have a list of {City, State}. It originally came from the database, and I have LocationID, but by now I loaded it into memory. Suppose I also have a table of fast food restaurants that has City and State as part of the record. I need to get a list of establishments that match city and state.
How to add an implementation of IDesignTimeDbContextFactory to add migration to .Net core 2.0 application?
I am trying to run Add-Migration InitialCreate command from package manager console from a .NET Core 2.0 MVC application. After looking at all possible sources still not able to resolve the issue with error description as :
ADO.NET provider with invariant name ‘System.Data.SqlClient;’ cannot be found (Entity Framework MVC)
I cannot seem to resolve what appears to be a common issue with Entity Framework 6. I have reviewed the many topics related to this issue on SO, and am unable to find a solution that works for my particular case.
The underlying provider failed on open entity framework
I am unsing entity framework in my web application. Earlier everything was working fine. But then I deleted database from Sql Server. After that whenever I run the application, I get the following exception :
Entity Framework – The underlying provider failed on ConnectionString
While using the Entity Framework I have split it out to it’s own project:
Attaching validation to EF objects used in MVC controllers/views?
We’re throwing together a quick project (CRUD forms) and decided to skip view models and use EF entities directly in controllers and views. Since I’m not used to this approach, I’m confused about handling validation.