entity-framework

Entity framework demo project

My client want Entity framework on next project, I am not getting how to start work on Entity framework... How should i start to implement this in my asp.net mvc application? if anyone can provide me demo project and some good article to start this. Thanks in advance ...

Update database schema at runtime with Entity Framework

I'm developing an application with EF4.0. Between the releases the database schema can change (e.g. column added, table added...). Is there a way to commit these changes to the customers database when they run the new release? I'm thinking of an function similar to CreateDatabase(). ...

Entity Framework: Substituting Primary Columns for Foreign Key Columns

I've created a new ASP.NET website. I've generated an Entity Data Model from my database and have dropped a entitydatasource and gridview onto my page and wired up the gridview to pull from the entitydatasource. Now I get columns like this: id extension prefix did_flag len ten_id restriction_class_id sfc_id name_display buil...

How does EntityState, HasChanges, HasPropertyChanges work on Partial Classes ?

Hi, I have a class coming from EntityFramework which I have extended with a few properties in a partial class. I expose and edit the values of these properties in my interface and everything works fine. But, I want to detect the change of value in the properties in my ViewModel, and while investigating the EntityState, HasChanges, HasPr...

Entity Framework using Stored Procedure - needs help.

i am using VS2008 3.5 framework. I'm attempting to use the Entity Framework for data access, but I'm running into a few issues with stored procedures. I imported this stored procedure into the framework diagram and then made it a function import but i dont see my stored procedure using (MyEntities context = new MyEntities ()...

Entity Framework database connection question

We are using .Net Entity Framework to do our database related work. Our database is Sybase SQL Anywhere. using (AndeDBEntities db = new AndeDBEntities(decryptConnStr())) { } We use a lots of above statements to access database. My questions are do we need to close the connection each time after the access is done and how to do that? ...

Build a generic repository for an Entity Framework application

Hi there. I'm trying to write a generic repository for my Entity Framework based application. Here's my prototype code: Interface public interface IDomainRepository { T GetById<T>(int id, Expression<Action<T>> idx) } and the repository: public class DomainRepository : IDomainRepository { private readonly...

Is the connecting string baked into the app.config of the respective assembly?

I have a website project which includes several assemblies which are built separately. One of the assemblies is the EntityModel, which also has an app.config file with the connection string to the database. The website project then brings that DLL into its own project. When I build the website assembly, I just copy the website folder t...

Entity Framework: Metadata when Entity Name is Same as Property?

I have a EDM with a entity "Extensions" - within this object is the property extension. I've wired up all the other columns just fine, but this one refuses to wire up. I'm guessing because the entity and the property share the same name? Here is my code, the extensions doesn't work, the prefix does work: Imports System.Web.DynamicData I...

Entity Framework: Update Entity when Another Entity is Updated

I have an EDM, it includes the entities extension and history. My goal is to use history to keep track of all the changes made to extension entity. For example, if extension with ID 223 has its property 'Name_Display' changed - I want the history entity to record this. I'm using ASP.NET with VB.NET. Where in my code do I put the hook to...

How do I get the identity field after insert on dynamic data form (entity framework)?

Hi people, I have a Dynamic Data custom page with a child formview that connects to the main formview with a query extender via a controlfilterexpression As per the first diagram: http://msdn.microsoft.com/en-us/library/dd985039(VS.100).aspx# I've hooked the ItemInserted event and would like to call an insert on the child using the id...

Layer Supertype with Entity Framework...

I was wondering if anyone had any success implementing a layer supertype for their Entities using POCO and Entity Framework v4. The layer supertype mainly deals with the common identity features of my entities, and has been designed for my POCO classes, but I am unsure how to map the object design to the database using edmx? ie Customer...

POCO valuetypes in ENtity Framework

I am using POCO types for my model. It is working perfectly but for Value Types (not nullable) like int or boolean, i am not able to change values to default. If boolean property is set to True i can't change it to false. Same is true about Int i cant change it to 0, other values working perfectly. It works fine for Nullable types. ...

ASP.Net MVC 2.0 Client-Side Validation Posting Back

Hi All I have been trying this based on Scott Gu's blog: http://weblogs.asp.net/scottgu/archive/2010/01/15/asp-net-mvc-2-model-validation.aspx My problem is that although my scripts are running (checked in firebug) and I don't get any errors. My page is still going to the server. I have javascript enabled too ;) I have the following...

Entity Framework: Create Change History

I have a EDM (phoneDB) that models a back-end MSSQL database. I've developed a ASP.NET (VB) application that allows one to edit the information in this database. When someone edits a record entry I'd like to record this action. Right now, I'm doing the following: For Each..Next that checks whether entry is an object that has had its...

Entity Framework: How to update database when modifying Model

Hi In Entity Framework 4 there are the options "Update Model from Database" and "Generate Database from Model". But what I'm missing is an option like Update Database from Model which reflects the changes made in the model (e.g. adding a new Property or Navigation-Property) by modifying the database schema (e.g. adding a n...

Get Specific Value from entity.OriginalValues in EFv4

I have an ObjectStateEntry "entry". I need to get a property value from this "entry" like so, but I don't know how to specify the property I want. I use entry.OriginalValues(propName) but then what? ...

Entity Framework: Save Object?

Here is my code: Partial Public Class AppsEntities Private Sub OnContextCreated() AddHandler Me.SavingChanges, AddressOf context_SavingChanges End Sub Private Shared Sub context_SavingChanges(ByVal sender As Object, ByVal e As EventArgs) For Each entry As ObjectStateEntry In DirectCast(sender, ObjectContext).ObjectStateManager.G...

question about entity

i have such code var menu = _dataManager.Menu.Details(id); var menu2 = _dataManager.Menu.Details(id); menu.Name = "AAA"; in this case menu2.Name will be "AAA", i guess it because of reference, but how can i solve it? ...

Where can I find (near) samples for different layers involved here

I am trying to implement a prototype based on the following: http://apparch.codeplex.com/wikipage?title=App%20Pattern%20-%20Three-Tier%20RIA%20Application%20Scenario While I understand most of it, I am just wondering if I could learn more from an existing samples regarding various layers as shown above. thanks. ...