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• Get data on the basis of conditions in entity framework 3.5 with include

  - by Ashwani K

  Hello All: I am using entity framework 3.5 for my application. I want load data based on some condition e.g. var data = from e in context.Employee.Include("Employee.Projects") where e.IsActive select e; Using this, I will get all the Employees which are active with their project details. But I want to load only those projects which are active. So, how to load only active projects using the query? Thanks Ashwani

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• How to log Entity Framework SQL

  - by Kevin Pang

  I'd like to be able to log all the SQL queries executed by the Entity Framework to log4net. What's the best way to do this?

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• Entity Framework with XML Files

  - by Tim

  Can someone point me to a good tutorial explaining the Entity Framework using an XML file instead of a database? I have seen some good tutorials with SQL databases, but I can't make the leap to an XML file. Thanks!

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• Entity Framework 4.0 Book Recommendations?

  - by Greg

  Hi, Anyone recommend any good Entity Framework 4.0 books? Ideally in eBook/PDF form. That is the covers the latest version of EF and VS2010. thansk

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• Suggestions on documentation of a DB model when using Entity Framework 4

  - by Junior Ewing

  Any experiences on how to document Entity Framework 4 based Database projects? There is the Document and Summary properties on the Entities, but if we want to regenerate the model from the database at some point, it will be lost! Is there some way to map documentation data inside SQL to the Entities in the EDMX file so it is safe. Suggestions of other best practices? Ideally I want to be able to augo generate html/helpfile documentation from the DB when we deploy.

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• What are the Java equivalents to Linq and Entity Framework

  - by Colin Desmond

  Having played with Linq (to SQL and Objects) as well as the Entity Framework from Microsoft recently, I was wondering what the non-.Net (specifically Java) equivalents are?

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• Are EntityFramework generated Entity Persistence Ignorance

  - by pdiddy

  So I'm starting to look into EF and POCO. From my understanding, the entity generated by EF is not pure POCO since it inherit from EntityObject. But are they PI? It seem to me that they don't have any persistence awareness in them, or there is something in the EntityObject that makes them PI?

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• Entity Framework 2.0: Cannot update EntityCollection

  - by timmits

  Let's say we have the "EntityCollection products". Then the following doesn't work: foreach (var product in products) { product.LastUpdate = DateTime.Now(); } As you can also not index an EntityCollection, how do you modify an entity in en EntityCollection?

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• How to implement table-per-concrete-type strategy using entity framework

  - by SDReyes

  Hello Guys! I'm mapping a set of tables that share a common set of fields: So as you can see I'm using a table-per-concrete-type strategy to map the inheritance. But... I have not could to relate them to an abstract type containing these common properties. It's possible to do it using EF? BONUS: The only non documented Entity Data Model Mapping Scenario is Table-per-concrete-type inheritance http://msdn.microsoft.com/en-us/library/cc716779.aspx : P

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• How do I use a custom xml entity in a javascript file

  - by tmim

  I have an 'overlay.dtd' file with a line like <!ENTITY myentity "myvalue">. At the top of my xul file I have <!DOCTYPE overlay SYSTEM 'chrome://myaddon/locale/overlay.dtd'>. In my xul file, I have <script src='myscript.js'>. I want to know if there is any way to access 'myentity' from the script. alert("&myentity;") just alerts "&myentity;"

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• ADO .net entity framework software requirements

  - by SARAVAN

  Hi, I have .net 3.5 SP1 and VS 2008 SP1 installed in my machine. But what should I further install to create an Entity framework project. Is there any other add ons that is needed?

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• Entity Framework 4 missing features?

  - by Roger Alsing

  I'm well aware that similair topics have been brought up before e.g. http://stackoverflow.com/questions/1639043/entity-framework-4-vs-nhibernate But instead of arguments like: NHibernate have been around longer and is more mature EF4 is drag n drop and not enterprisy EF4 and LinqToSql are ... I would like to see a more detailed list of features that you consider missing from EF4. Personally, I think the lack of enum support is the biggest drawback of EF4.

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• Create database from ADO Entity Data Model

  - by Marco

  Hi, I've described my model using an Ado Entity Data Model file (*.edmx), and i wish now to generate my db schema and tables from it. Is it possible? Thanks

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• Entity Data Model Wizzard not creating tables in EDMX file

  - by Shawn

  I'm trying the database first approach by creating an ADO.NET Entity Data Model using the Wizard with the Adventureworks2012 DB. Testing DB connection works, and the connection string is added to the App.Config. I'm selecting all the tables except the ones marked as (dbo) AWBuildVersion, DatabaseLog, and ErrorLog. When the Wizard finishes the .edmx file is blank, and if I view the file in XML view the EntityContainer is empty. I'm using VS 2010 & .NET Framework 4.0

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• Association end is not mapped in ADO entity framework

  - by Sean

  I am just starting out with ADO.net Entity Framework I have mapped two tables together and receive the following error: Error 1 Error 11010: Association End 'OperatorAccess' is not mapped. E:\Visual Studio\projects\Brandi II\Brandi II\Hospitals.edmx 390 11 Brandi II Not sure what it is I am doing wrong

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• select top 5 in entity framework

  - by fishiefishie

  I have [Person] PersonID, EmailAddress, FirstName, LastName [OnlineAccount] OnlineAccountID, PersonID, Nickname Each person is allowed to have 0-* OnlineAccount. In entity framework with C#, how do I select the top 5 Person that has the most accounts?

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• Repository Pattern: SaveOrUpdate() in Entity Framework and L2S

  - by JMSA

  These web articles uses separate Save() and Update() methods in the repository pattern. I am using repository pattern. How can I write a SaveOrUpdate() method in Entity Framework with the help of ObjectContext and in Linq-To-SQL with the help of DataContext? That is, how can I write a single method that shall do both save and update job?

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• one or more Entity models for one database for entity framework?

  - by KentZhou

  When use entity framework for DAL tier, VS 2010 can create edmx for each database. Question: If I have a database with many tables, should I create only one edmx for all tables or mutiple edmx files? for example, maybe all security tables for one edmx file, other tables for another edmx file. If there is more than one, then in other tiers, there will have more then on ObjectContext in code for business logic. Which one it the best solution for this case?

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• Entity Framework .. partial constructor

  - by adamjellyit

  Hi .. I intend to extend the constructors of some of the entities in my Entity Framework (4). However how do I ensure that my constructor is run after the model has run its. i.e. I want to ensure that the the object holds the data from the database before I work on it in my constructor.

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• Sql Server xml column with Entity Framework - how to keep insignificant whitespaces

  - by Saravanan

  Sql server 2005 (even 2008) strips the insignificant whitespaces by default. To keep one can use the CONVERT funtction with the last argument as '1' (Ref. Article). How can we do the same thing in Entity Framework? thanks

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• MVVM: ado.net entity framework and model

  - by EV

  Hi, I'm writing an application in wpf that uses MVVM. I wondered if I could use ado.net entity data model as a model in MVVM? Is it the same? If not, why? Thanks for any help. Regards, Ev.

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• Update Database from Entity Data Model without loosing content

  - by user293818

  Hi there, my Topic should tell you already what i am asking for. Is there any way to update my database from an entity data model without lossing the inserted content? I can't be bothered copying all this stuff everytime i make a change. Thanks a lot. Chris

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• Internal classes with ADO.NET Entity Framework

  - by Regent

  I'm using Entity Framework for creation of my Data Access Layer and I want for all of my classes to be internal. I know it is possible to manually assign it manually in the designer for each class. But looks like it also requires to set internal modifier for each single property in every class! I have about 30+ entities and it will be a huge work to do. Do you know any ideas how to set a 'default access' for the entire model?

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• How to implement table-per-concrete-type using entity framework

  - by SDReyes

  Hello Guys! I'm mapping a set of tables that share a common set of fields: So as you can see I'm using a table-per-concrete-type strategy to map the inheritance. But... I have not could to relate them to an abstract type containing these common properties. It's possible to do it using EF? BONUS: The only non documented Entity Data Model Mapping Scenario is Table-per-concrete-type inheritance http://msdn.microsoft.com/en-us/library/cc716779.aspx : P

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• Using Entity Framework 4.0 in a .Net 3.5 Application

  - by Hossein

  Is it possible to use Entity Framework v4.0 in a .Net 3.5 application? I mean, can i just reference the related assemblies for EF 4.0 and use it in my .Net 3.5 application? thanks...

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