ef-code-first

问题 [Updated] I have 2 projects in my solution. the first one is my DAL project(Class Library), and the second is a Windows Project(UI), my DAL Project referenced to EF 4.3.1 and worked normally, Recently I referenced my DAL project to EF6 , using Package Manager Console, by Update-Package EntityFramework command, in VS2010, after applying the recommended changes in EF official site, now the app.config of my DAL project include these lines: <configSections> <section name="entityFramework" type=

问题 I had a web service project, with a database integration of course :) I use Entity Framework, so I generated my EF model from my db (sql server express). Everything was okay till my computer got broke. I had my project files backed up so I recovered them. But I didn't have the db backup(shame). As far as I know there is this concept Code First , and what I am wondering is can I use it to regenerate my db? Otherwise I'll have to try getting the db from the old disk, or rewriting the whole db.

问题 I have the following property declarations and mappings (abridged classes): public class Consumer: AuditableEntity { public virtual Consumer Parent { get; set; } public virtual User User { get; set; } public virtual Role Role { get; set; } public virtual ICollection<Consumer> Consumers { get; set; } } public ConsumerMap() { HasRequired(t => t.Role) .WithMany(t => t.Consumers) .Map(a => a.MapKey("RoleId")) .WillCascadeOnDelete(false); HasRequired(t => t.User) .WithOptional(t => t.Consumer)

问题 I've seen it mentioned sometimes that Repository Pattern is built into Entity Framework Code First via the DbSet and DbContext objects. However that leaves a few problems: 1) Injection - Hard to inject as there isn't a clear cut Interface 2) Mocking - Same as above 3) Multiple references to EnitityFramework.dll - Let's say I create my Code First in it's own assembly/project and then want to reference that in another place I also have to reference entityFramework.dll without some wrapper

问题 I have the following code for adding a record to many-to-many relationship in a disconnected way. I wonder if it is possible to achieve a delete operation with disconnected approach. using (var db = new FMyDbContext()) { int selectedTeamId = Convert.ToInt32(lst_AllTeams.SelectedValue); Team myTeam = new Team() { TeamId = selectedTeamId }; int selectedCompId = Convert.ToInt32(grd_Competitions.SelectedValue.ToString()); Competition myComp = new Competition() { CompetitionId = selectedCompId };

问题 I made a simple mvc 3 web site. It's working fine but the database and classes are messy because I needed to make dropdownlists and I have no idea how to implement the drowdownlists using a different style. Here's how things look like: public class Departments { public int ID {get; set;} ... } public class Users { public int ID {get; set;} ... public Department Dept {get; set;} public List<Department> DeptList {get; set;} public string SelectedDept {get; set;} } then I used DropDownListFor

问题 I have been supplied a DB, and I need to get Code First set up for it. I think I'm mostly done, the problem that I'm running into right now is I want to change some of the foreign key names in the entities to make a little more sense. Let's say I have two tables, Person and Location, that look like this: Person ------ PersonId int not null (PK) DefaultLocation int not null (FK) Location -------- LocationId int not null (PK) For the location entity, I think I've got it: public class Location {

问题 I am using EF 6.1 Code First and want to track history data by using a model which (simplified) looks like this: public class Customer : IHistoryData<CustomerData> { public Guid ID { get; set; } public virtual ISet<CustomerData> Versions { get; set; } } public class CustomerData : HistoricalData { public string Name { get; set; } } public interface IHistoryData<T> where T : HistoricalData { ISet<T> Versions { get; set; } } public class HistoricalData { public int VersionID { get; set; }

问题 I have an ASP.NET MVC3 application that I have built and it has two databases. One is in reference to the Default Membership Provider and was automatically created when I built the app. The other is a database I have named SchoolContext and I would like all the information within SchoolContext to be stored in the same database as all the data in Default Membership Provider. Here are my two connection strings: <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS

问题 I have a relatively complex relationship I need to set up between a User object and a lot of lookup tables. The user object is your run of the mill user model: public class Youth : IAuditInfo { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } public Guid YouthGuid { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public Address Address { get; set; } public DateTime CreatedDate { get; set; } public DateTime