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• ASP.NET MVC project samples with entity framework

  - by Shawn Mclean

  Hello, is there any sample projects that I can download that shows alot of interaction with the entity framework and the mvc pattern of asp.net? It should have stuff such as: CRUD CRUD on child records Relationships Inheritance Thank you.

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• complex type in entity framework

  - by kathy

  Hi,,, When I need to use the complex type in entity framework?? or in other words what is the complex type used for ? Thanks

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• Entity Framework: Generating database from classes

  - by Anonymous Coward

  Hi Everyone Is it possible to create the database from the classes with entity framework 4.0? I found many tutorials on how to do it the other way round. But since we have already implemented and tested all classes of the domain we'd like to avoid changing them to much. If I used the wrong keywords in Google I'd appreciate you could post a link. Cheers, CA

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• Any Name Entity Recognition - web services available

  - by Gublooo

  Hello I wanted to know if there are any paid or free named entity recognition web services available. Basically I'm looking for something - where if I pass a text like: "John had french fries at Burger King" It should be identify - something along the lines: Person: John Organization: Burger King I've heard of Annie from GATE - but I dont think it has a web service available. Thanks

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• The entity framework and database agnostic programming, possibilities?

  - by Theo

  We want to use the Entity Framework (.NET 4.0) to build applications that can deal with Sql Server, MySQL and Oracle. And maybe Sqlite too. It should be easy to switch the db vendor by some setting in a config file. Is this possible? I prefer real life examples! What kind of providers did you use?

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• Entity Framework Polymorphism

  - by Chubbs

  Hey guys, I wanted some help with trying to implement a simple polymorphic relationship using Entity Framework. An example of a relationship I would like to implement: Comment table ItemType ('Video', 'User') ItemID Body Video has many Comments User has many Comments No idea the best way to do this, I come from a Ruby on Rails way of thinking.

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• Entity Framework and Modeling Collections with an Interface as a return type

  - by William

  I am using Entity Framework v4. I have created a POCO class that contains a bunch of scalar properties and a collection that returns an Interface type. How do I create this relationship in the EF model? How do I show a collection that contains different items but they all have a common interface?

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• Entity Framework 4 Visual Studio 2008

  - by Coppermill

  I'm been looking around and trying to see if the Entity Framework 4 will run under Visual Studio 2008, but can;t find any references to it. Can you get EF4 working on VS2008?

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• Concurrency checking in Entity Framework with stored procedures while deleting

  - by bodziec

  Hi, My UPDATE and DELETE logic are in stored procedures. I've built an entity framework model with mappings to these procedures. In spUpdate I return the new timestamp column so the EF could detect concurrency conflicts. It works fine. I have a problem with the spDelete because I don't see mappings for return values in the "delete function" row. How to check concurrency in this example?

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• Entity Framework foreign relationship issue

  - by Doug Hope

  I've had an entity framework model working for some time. Yesterday, it suddenly started complaining about a foreign key relationship issue during an insert. I've checked the fields and can do a manual insert using the exact field values. But the EF continues to complain. Any ideas what could have happened?

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• Entity Framework looking for wrong column

  - by m.edmondson

  I'm brand new to the Entity Framework and trying to learn all it can offer. I'm currently working my way through the MVC Music Store tutorial which includes the following code: public ActionResult Browse(string genre) { // Retrieve Genre and its Associated Albums from database var genreModel = storeDB.Genres.Include("Albums") .Single(g => g.Name == genre); return View(genreModel); } as I'm working in VB I converted it like so: Function Browse(ByVal genre As String) As ActionResult 'Retrieve Genre and its Associated Albums from database Dim genreModel = storeDB.Genres.Include("Albums"). _ Single(Function(g) g.Name = genre) Return(View(genreModel)) End Function The problem is I'm getting the following exception: Invalid column name 'GenreGenreId'. Which I know is true, but I can't for the life of my work out where it's getting 'GenreGenreId' from. Probably a basic question but I'll appreciate any help in the right direction. As per requested here is the source for my classes: Album.vb Public Class Album Private _title As String Private _genre As Genre Private _AlbumId As Int32 Private _GenreId As Int32 Private _ArtistId As Int32 Private _Price As Decimal Private _AlbumArtUrl As String Public Property Title As String Get Return _title End Get Set(ByVal value As String) _title = value End Set End Property Public Property AlbumId As Int16 Get Return _AlbumId End Get Set(ByVal value As Int16) _AlbumId = value End Set End Property Public Property GenreId As Int16 Get Return _GenreId End Get Set(ByVal value As Int16) _GenreId = value End Set End Property Public Property ArtistId As Int16 Get Return _ArtistId End Get Set(ByVal value As Int16) _ArtistId = value End Set End Property Public Property AlbumArtUrl As String Get Return _AlbumArtUrl End Get Set(ByVal value As String) _AlbumArtUrl = value End Set End Property Public Property Price As Decimal Get Return _Price End Get Set(ByVal value As Decimal) _Price = value End Set End Property Public Property Genre As Genre Get Return _genre End Get Set(ByVal value As Genre) _genre = value End Set End Property End Class Genre.vb Public Class Genre Dim _genreId As Int32 Dim _Name As String Dim _Description As String Dim _Albums As List(Of Album) Public Property GenreId As Int32 Get Return _genreId End Get Set(ByVal value As Int32) _genreId = value End Set End Property Public Property Name As String Get Return _Name End Get Set(ByVal value As String) _Name = value End Set End Property Public Property Description As String Get Return _Description End Get Set(ByVal value As String) _Description = value End Set End Property Public Property Albums As List(Of Album) Get Return _Albums End Get Set(ByVal value As List(Of Album)) _Albums = value End Set End Property End Class MusicStoreEntities.vb Imports System.Data.Entity Namespace MvcApplication1 Public Class MusicStoreEntities Inherits DbContext Public Property Albums As DbSet(Of Album) Public Property Genres As DbSet(Of Genre) End Class End Namespace

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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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• 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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• Can Entity Framework model be passed a SQL script to be run against the database

  - by Greg

  Is it possible to pass a SQL script to some method that Entity Framework has to run it against my model? e.g. equivalent of: context.ExecuteStoreCommand(<tsql script path>); Background: I want a way to reset the database during unit tests, and making a call to run the EF generated TSQL script (from Generate Database from Model) seems one way to achieve this.

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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 - How do create an association to/from the same entity?

  - by Greg

  Hi, In Entity Framework (VS2010) how do I create an association to/from the same table? (a many-to-many is what I want) Background - I was expecting under the bonnet a NODE and RELATIONSHIP table, where the latter has a parent_node_id and a child_node_id (i.e. pointing back to the NODE id column). I can't seem to get the designer to add it...

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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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• 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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• 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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• 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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• 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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