Entity Framework Core Tutorial - Knowledge Base (KB)
2016 results for: in tag: c#
EF Core Mapping EntityTypeConfiguration
In EF6 we usually able to use this way to configure the Entity....public class AccountMap : EntityTypeConfiguration<Account> { public AccountMap() { ToTable("Account"); HasKey(a => a.Id); Property(a => a.Username).HasMaxLe...
asked by Herman
A relational store has been configured without specifying either the DbConnection or connection string to use
I using asp.net vnext and ef7 when i want adding user i getting this error:...A relational store has been configured without specifying either the DbConnection or connection string to use....What is this?...Consider my app start:...using DomainModels; u...
asked by user1968030
many to many EF7
Models:...public partial class Film { public int FilmID { get; set; } public virtual ICollection<Genre> Genres { get; set; } } public class Genre { public int GenreID { get; set; } public virtual ICollection<Film> Films { get; set; } } ....
asked by Artem Shaban
How handle these two models in code first approach using Entity Framework 7?
Problem...I am coding proof of concept ASP.NET 5 MVC6 that will simulate a library. I am using CTP6 and beta3. ...How to define their relationship in Entity Framework 7 using code first approach? ...Shelf and Books need a join table. As I see it, this app...
asked by hlyates
ASP vNext and PostgreSql
exists currently any way, how to communicate with PostgreSql database, when I want to use ASP.NET vNext? I'm looking for solution, which will work mainly on linux....EF7 supports only MS SQL a SqlLite now and Npgsql isn't ported for ASP.NET vNext....Thank...
asked by Rudis
DbSet doesn't have a Find method in EF7
I am trying to create a generic repository to access my database. In EF6 I was able to do that in order to get a specific entity:...protected IDbSet<T> dbset; public T Get(object id) { return this.dbset.Find(id); } ...DbSet in EF7 is missing a Find m...
asked by Lyudmil Dimitrov
Configure more than one dbcontext in EF 7
I created a web starter application with VS 2015 ctp, and I would like to add an in-memory store to do some test, but when I try to read the data, I get this message ...The data stores 'SqlServerDataStore' 'InMemoryDataStore' are available. A context ca...
asked by Luca Morelli
Is there an Entity Framework 7 Database-First POCO Generator?
I've been playing around with Entity Framework 7 and ASP.NET 5 for a new project I'm working on, but I've hit a roadblock. The team I'm working on uses a DBA-first approach to development; i.e. the database is designed by DBA's and then the developers alt...
asked by Ron Penton
ASP.NET 5 MVC 6 and Entity Framework 7 issues
We can't add Owin and Entity framework 7 together. As we do so then there will be ambiguity between Microsoft.AspNet.Identity.core 2.0.0.0 and Microsoft.AspNet.Identity 3.0.0 Beta1...And hence I am not able to implement role provider in my application to ...
asked by sanjaypujari
Multiple dbContexts in ASP.NET vNext and EF7
I'm trying to get along with building web systems with ASP.NET vNext using MVC 6 and EF7. I'm looking at this tutorial: ...http://stephenwalther.com/archive/2015/01/17/asp-net-5-and-angularjs-part-4-using-entity-framework-7...On the page you'll see how to...
asked by jimutt
Adding DbContextOptions in Startup.cs not registering data store
My problem is that the below code does not register a data store during startup. This is the specific "error" statement I get in the response from the application:...An unhandled exception occurred while processing the request. InvalidOperationException:...
asked by DanielRJ
EF7 contructor with MVC6 dependency injection
Testing out the new MVC6 and EF7 framework....We often need the HttpContext in our database layers. To do this in MVC6 we simply have a DbContext constructor that looks like this:... public class ApplicationDbContext : IdentityDbContext<ApplicationUser> ...
asked by Feech
Entity Framework 7 and login failed
I'm trying to work with ef7 and asp.net mvc 6, but when i try to work with db there comes following exceptions:...Cannot open database "Posts" requested by the login. The login failed....Login failed for user 'alexpc\Alexandr'....In DbContext class i use...
asked by neonhash
How to work with collections
Can anyone write mini-guide which explains how to work with collections in EF?...For example I have following models: ...public class BlogPost { public int Id { get; set; } public string Title { get; set; } public string Content { get; set; } ...
asked by neonhash
Can these models be represented in EF7?
I'm trying to use some classes from another assembly in my own project as entities that I can persist using EF7, rather than writing a series of very similar classes that are more database-friendly....Simplified versions look like this:...interface IMedia...
asked by Sam Nelson
Entity Framework 7 Reverse Engineering ASP.NET 5
I have been trying to migrate my database into web app model using EF7 _4. ...Couple things I realized is that the syntax/approach how to configure particular entities has been changed. ...Normally you generate POCO classes by using EF Power Tools (EF6), ...
asked by stenly
Unable to use data annotations
So here we are trying to get a handle on EF7 ahead of the game and I'm running into what I can only call madness....In EF6 I use annotations quite a bit and I am trying to carry that over into EF7 which according to the UnicornStore project this is totall...
asked by Marqueone
How to use EF7 from VSCode in Mac?
I'm new to C# and I'm trying to connect to a DB preferably PostgreSQL (or do I must use MS SQL?). How do I do that in VSCode and Mac (using dnx CLI)?
asked by Tingan Ho
Linq Join when using EF7
I have the following linq statement:...( from apiKey in context.Set<ApiKey>() join application in context.Set<Application>() on apiKey.User equals application.User join paymentGateway in context.Set<PaymentGateway>(...
asked by Jake Rote
EF7 beta5: Foreign Key returns null value
I have created an API using ASP.NET5 and Entity Framework 7.0.0-beta 5. ...I have the Model, DbContext and the Repository created, and when I try to retrieve data from my database I get all the data, except the foreign key data....The foreign key value is...
asked by unairoldan
Page 1 of 101