Entity Framework Tutorial - Knowledge Base (KB)
2575 results for: in tag: entity-framework-6
Check if there are any pending changes to be saved
Is there a way to find out whether there are unsaved changes in my entity context, in the Entity Framework?
asked by Palantir
Table-per-type inheritance with EF 4.1 Fluent Code First
I have a pretty straight forward set of database tables, like:...Vehicle Id RegNo Car Id (FK of Vehicle.Id) OtherStuff Bike Id (FK of Vehicle.Id) MoreStuff ...My class model is as you'd expect: with Vehicle being an abstract class, and then Car an...
asked by nbevans
EF code-first: How to load related data (parent-child-grandchild)?
I have this entity:...public class DynamicPage { public int PageId { get; set; } public int Order { get; set; } public string MenuText { get; set; } public string MenuHover { get; set; } public int? ParentId { get; set; } pub...
asked by javad amiry
async-await issue in EF 6
I'm trying async-await programming with entity-framework 6 (code first) + WPF and I can't see why the UI still freezes after I made the code asynchronous. Here is what I'm doing from the very first line:...first there is an event handler responding to a c...
asked by Vahid
Entity Framework 6 Code First Migration's ContextKey
Now i'm using EF6 Alpha, and when using migration, it will add a new migration log into the __MigrationHistory table....In EF6, The __MigrationHistory table has a new column called "ContextKey". After testing, I found there are two default "ContextKey" va...
asked by RongieZeng
Can't update database using EF Migrations after updating to EF 6.0.0-alpha
After updating my Entity Framework to version 6.0.0-alpha1 I cant update database. This is the error I'm getting:...PM> update-database -verbose Using StartUp project 'DataCenter'. Using NuGet project 'DataCenter.Domain'. Specify the '-Verbose' flag to vi...
asked by Mahmoodvcs
Entity Framework 6: Right usage of "Custom Code First Conventions" Feature?
My requirement is configuing the string length mapping globally, but also can use MaxLengthAttribute to configue a property specially. Here's my code:...public class StringLengthConvention : IConfigurationConvention<PropertyInfo, StringPropertyConfigurati...
asked by RongieZeng
Entity Framework Provider type could not be loaded?
I am trying to run my tests on TeamCity which is currently installed on my machine....System.InvalidOperationException...: ...The Entity Framework provider type '...System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer..., ...Ver...
asked by ashutosh raina
Entities Framework 6 alpha 2 - Async Patterns
I recently have a project with MVC 4, .NET 4.5 and using EF 5.0 (Database First) using the EF 5.0 DbContext Generator. I then upgraded through Nuget Manager to EF 6.0 alpha 2. I wanted to use the new async patterns but for some reason I dont have .ToLis...
asked by Joe
EF 6 System.Data.Objects.ObjectContext Error
I recently upgraded from Entities Framework 5 to Entities Framework 6 Alpha 2 and I am getting the following error:...Method not found: 'System.Data.Objects.ObjectContext System.Data.Entity.Infrastructure.IObjectContextAdapter.get_ObjectContext()'....Th...
asked by Joe
Is calling AsQueryable<T> on a DbSet<T> "safe"?
Say I want to unit test Entity Framework's query logic, one way would be to convert the ...DbSet<T>... to ...IQueryable<T>... before building the expression trees for easy mocking. Is this "safe" and is there anything to be aware about?
asked by Dante
EntityFramework 6 Alpha 2 & MySQL Connector/NET 6.6.4
The 6.6.4 MySQL .NET connector apparently has support for EF6. I've upgraded from EF5 and .NET 4 to EF6 alpha2 and .NET 4.5. I've recreated the ADO.NET Entity Data Model since upgrading....Upon doing anything to the database it throws up an exception mess...
asked by pierce
Entity Framework 6 + SQLite
I'm trying to use EF6 alpha and SQLite 1.0.66.0...My .config file:...<connectionStrings> <add connectionString="data source=:memory:;" name="TestDbContext" providerName="System.Data.SQLite" /> </connectionStrings> <entityFramework> <providers> ...
asked by nmulyukin
Can't find System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer
I'm constructing a DbContext from an SqlConnection. When I use it, I receive the following error:...The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicK...
asked by Vincent-Philippe Lauzon
ASP.NET MVC 4 + Entity Framework 6 + SQL Compact Edition 4.0 deployment no install
Im trying to deploy a basic MVC 4 app that uses Entity Framework 6 (Code First) and SQL Compact 4.0 on a clean install of windows 7 with iis installed (mvc 4 and sql compact 4.0 is not installed)....I got the following nuget packages installed on the db p...
asked by oskarkvamme
How to get original Entity from ChangeTracker
Is there a way to get the original Entity itself from the ...ChangeTracker... (rather than just the original values)?...If the ...State... is ...Modified..., then I suppose I could do this:...// Get the DbEntityEntry from the DbContext.ChangeTracker... /...
asked by Eric
EF6 alpha Async Await on an Entity Stored Procedure / Function Import?
I'd like to apply the new async await functionality to Stored Procedures / Function Imports imported in my Entity model, but have as yet been unable to with the EF6 alpha....Is it yet possible in EF6 alpha2 (or the nightly build as of 20211) to call any o...
asked by blueFish
Error deploying to SQL Azure using EF 6 alpha3 Code First and Migrations creating __MigrationHistory table
I'm using EF 6 alpha 3 code first. When I try to create the database on SQL Azure running the Update-Database command I get the following error:...Tables without a clustered index are not supported in this version of SQL Server. Please create a clustered ...
asked by Bruno Moscão
EntityFramework, version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 is incompatible with .net framework 4
I have recently upgraded all solutions in my project to EF6 alpha3 but one of my projects is missing the EntityFramework.dll and EntityFramework.SQLServer.dll references. Naturally this is causing an error when I run the application, but when I try to man...
asked by Terra
Entity Framework and Migration with multiple schemas in a single Context
I am developing a multi-tenant application with Entity Framework Code First. Each tenant will have a different schema in the database, but the application will have a single Context and model for all tenants. ...The Entity Framwork 6 is able to use multi...
asked by Bruno Albano de Souza
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