Entity Framework 6 - Knowledge Base (KB)
31 results in tag: entity-framework-5
Check for any modifications that need 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
How to load related data (parent-child-grandchild) in EF code first?
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 ravy amiry
In Entity Framework, why isn't lazy loading working for a one-to-zero-or-one navigation property?
Consider ...Person... and ...Address... classes defined as...class Person { public int PersonId { get; set; } public virtual Address Address { get; set; } } class Address { public int PersonId { get; set; } public virtual Person Person { get; set...
asked by Mike
Updatable Views in Entity Framework 5/6
I have several Views that are updatable according to ...http://technet.microsoft.com/en-us/library/ms187956.aspx.... ...All of my views follow the specifications in the afformentioned article. I have verified in SQL Management Studio that the views can be...
asked by puddinman13
Different results from [ForeignKey] attribute vs. OnModelCreating or EntityTypeConfiguration
For background: I'm trying to keep my EF POCOs free from references to EF, so all model configuration code is going into either OnModelCreating or EntityTypeConfiguration classes instead of using attributes (thus avoiding the reference to System.Component...
asked by derGral
How to install EntityFramework 5.0 (and other older versions) from NuGet?
I installed EF 5.0 into the .DAL, now I want to install EF 5.0 into .BLL from Nuget...But the default online Nuget package always comes up with 6.0, which gives error when used together with the 5.0 EF I use in DAL....Where can I install the 5.0 version o...
asked by thenewseattle
Code-first: Mapping entities to existing database tables
I am using Entity Framework 6 code-first with an existing database, but having problems mapping my entities to the database tables....Normally, I would use database-first approach and have my entity and context code generated, but using the designer has b...
asked by Dave New
Entity framework manually deleted tables cant be generated from EF migration
I have created migration and created the database and the tables . For example the tables are ...A B C D E... . Now again I have changed some part of code and ran ...update-database... command . Everything went smooth and nice and the tables showed the co...
asked by Joy
Upgrade from Entity Framework 5 to 6
After upgrading our project from using Entity Framework 5 to Entity Framework 6 (though NuGets update function) i get the following error on my generated Entities class:...Error 1 The type or namespace name 'Objects' does not exist in the namespace 'Sy...
asked by RossBille
Entity Framework Poor COUNT Performance
We are experiencing very poor performance using Entity Framework 5.0 with MySql Connector 6.6.6.0 for count based queries. Our data structure looks like:...Table: Post =========== ID INT PRIMARY KEY MemberID INT NOT NULL SiteID INT NOT...
asked by fungus1487
Entity Framework query ToString won't produce SQL query
Through my research I've discovered that, since at least EF 4.1, the .ToString() method on an EF query will return the SQL to be run. Indeed, this very frequently works for me, using Entity Framework 5 and 6....However, occasionally I call this method and...
asked by TheRubberDuck
NullReferenceException in EF 5-6.1.1 with two navigation properties to the same type
I'd like to start with that I have a workaround for this issue - but I spent a few hours today figuring out the cause of the exception, so I'd thought I'd share...Given two entities in the domain:...public class User { public int Id { get; set; } ...
asked by Matt V
Entity Framework 6 Batch Updates and AuditLog using Entity Framework Extended
I am using Entity Framework 6 and I am using EntityFramework Extended to perform some batch updates and batch deletes. The batch updates and batch deletes work OK however I also need to know the entities that were updated / deleted (i.e. the current and ...
asked by quophyie
Entity Framework 6 - Audit Log
I have a doubt regarding Audit Log under Entity Framework 6.0...I have implemented it but it really slows downs when I update or insert....In other application (Not using EF), I used to create a memory XML with the audit information and then send it to a ...
asked by VAAA
EF Database first how to update model for database changes?
In a class library ...Ado.net Entity Data Model... is has generated POCO classes. These were generated fine for the first time. But database changes are not being reflected. In ...edmx... diagram right clicking and choosing ...Update Model from Database..
asked by user576510
Is it possible to set a unique constraint using Entity Framework Code First?
I want to enforce Unique constraint in a table & I am using Entity Framework Code-First....Is it possible to add a unique constraint using EF 6 as i believe in earlier versions it was not possible.
asked by subi_speedrunner
auto update code first from database model, is it possible?
I have code first classes which are generated from my existing db using ADO.NET Entity Data Model. Now I've added some new tables to the database. ...I want to know if its possible to create associated code classes from the new db tables without (re)creat...
asked by Laziale
WCF OData Service stored procedure call generates "Operation could destabilize the runtime" error with $select option
I've been trying to call a stored procedure through Entity Framework and WCF Data Services (OData). It returns an entity not a complex type. Following walkthroughs found all over the web (like this ...one...), I came up with this code inside my service:..
asked by iamnobody
How does Entity framework implement deleting parent and a child record on the ame SaveChanges()
I have the following two entity sets representing Dept & Emp:-...public partial class Dept { public Dept() { this.Emps = new HashSet<Emp>(); } public int DeptID { get; set; } public string Name { get; set; } public string ...
asked by john Gu
how to insert parent child while doing entityframework.bulkinsert?
I am using Entityframework 6, I am trying to insert a parent-child kind of data in the database. I am using Entityframework.BulkInsert to insert data. I have ...autoIncrement int primary key... in all the tables...My object is as follows :... var paren...
asked by user3825003
