entity-framework-4

In order to get practice with Entity Framework, I am creating a C# WinForms project, and I used the answer to the question in this link to join and display tables in a datagridview: Two entities in one dataGridView I have searched for a clean way to save (to the SQL Server database) the changes made in the datagridview. Is there a good, fast, short, clean way? I have seen some ugly attempts, and even if they work, I am turned off by their ugliness. With one table only (no joins), calling .SaveChanges works fine. Here is the class set up to hold the joined fields: public class CustAndOrders { /

I would like to append a set of conditional where clauses onto the end of an ObjectSet. However, the clauses do not get executed and instead the original query is run, for example: using (Entities context = new Entities()){ var q = context.AuditLogs; q.Where(o => o.WebsiteId == 1); } The where clause is not executed and the full result set is returned I could instead use IQueryAble as in: var q = context.AuditLogs.AsQueryable(); q = q.Where(o => o.WebsiteId == 1); However this loses me the power of being able to use .Include to eager load my related entities. No, it won't. at any point before

Good morning everyone, I am trying to tackle a problem I run into with EF code first. My schema is the following public class Article : IUrlNode { [Key] public Guid ArticleID { get; set; } public string Title { get; set; } public DateTime DateCreated { get; set; } public DateTime DateUpdated { get; set; } public string Summary { get; set; } [System.ComponentModel.DataAnnotations.InverseProperty("CategoryArticles")] public virtual IQueryable<Category> ArticleCategories { get; set; } public string FriendlyUrl { get; set; } } [RouteChild("CategoryArticles")] public class Category : ContentNode {

There's a many-to-many UserFeed table that stands between User and Feed and denotes a twitter-like follow relationship. It only has two fields, which form a composite key: UserID and FeedID . I need to write a method that will subscribe or unsubscribe a user from a feed based on a boolean flag. public void SetSubscriptionFlag (int userId, int storeId, bool subscribe) { } I'm new to Entity Framework so I'm trying to find and follow an "EF-ish" way to accomplish this. My initial thoughts are: Instead of working with the middle UserFeed class, I should create a many-to-many Subscriptions property

I want to create a entity model from the existing database but all the table names contain "_"/underscore in the database so while creating poco classes i want remove underscore from name of the entities/poco classes. Is there a way to change the naming convention while the entities are created in the entity framework during the creation of model from database Thanks, Amit You have two options, There is a little bit of a learning curve but it involves using T4 templates to do the code generation yourself. Basically you would just strip out the _ in the conceptual model. guide to customizing

I am trying to use my generic repository with a "unit of work" pattern. Here is my work details public class GenericRepository:IRepository { private readonly string _connectionStringName; private ObjectContext _objectContext; private readonly PluralizationService _pluralizer = PluralizationService.CreateService(CultureInfo.GetCultureInfo("en")); public GenericRepository() { this._objectContext = ContextManager.CurrentFor(); } public void Add<TEntity>(TEntity entity) where TEntity : class { ((DataEntities.MyTestDBEntities)_objectContext).Countries.AddObject(new Country() { CountryName="UGANDA"}