So, I am using the Linq entity framework. I have 2 entities: ...Content... and ...Tag.... They are in a many-to-many relationship with one another. ...Content... can have many ...Tags... and ...Tag... can have many ...Contents.... So I am trying to write ...
I am using the Entity framework to create a new order. The order contains a collection of contacts, a many to many relationship. I want to add a reference to an existing contact on the order on creation of the order. Both Order and Contact a Entity Obj...
I'm trying EF out and I do a lot of filtering based on many to many relationships. For instance I have persons, locations and a personlocation table to link the two. I also have a role and personrole table. ...EDIT: Tables:
Person (personid, name)
Perso...
Does anyone know how to delete many-to-many relationship in ADO.NET Entity Framework without having to load all of the data? In my case I have an entity ...Topic... that has a property ...Subscriptions... and I need to remove a single subscription. The co...
I am having problems querying many-to-many relationships in Linq To Entities.
I am basically trying to replicate this query using Linq:...Select *
FROM Customer
LEFT JOIN CustomerInterest ON Customer.CustomerID = CustomerInterest.CustomerID
LEFT JOIN In...
I'm using EF4 and new to it. I have a many to many in my project and cannot seem to work out how to insert or update. I have build a small project just to see how it should be coded....Suppose I have 3 tables...Class : ClassID-ClassName ...Student : Stude...
I can't seem to make this work at all...class Member
{
public virtual IList<Member> Friends { get; set; }
[Key]
public int MemberId { get; set; }
public string Name{ get; set; }
}
...I tried adding Mappings but in vain. Is there a way to d...
I've searched everyhwere but couldn't find an answer......First, I have created a many to many relationship using code first which worked well. Each person can be in multiple clubs and each club can have multiple members. The ...ClubPersons... table has b...
I have this scenario:...public class Member
{
public int MemberID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public virtual ICollection<Comment> Comments { get; set; }
}
public class Comment...
I've read ALL of:...Unable to create a constant value of type 'System.Object' in Entity Framework...Entity Framework - "Unable to create a constant value of type 'Closure type'..." error...Entity Framework - Union causes "Unable to create a constant value...
How can I detect changes of ICollection<> properties (many-to-many relationships)?...public class Company
{
...
public virtual ICollection<Employee> Employees { get; set; }
}
using (DataContext context = new DataContext(Properties.Settings.Defau...
I am having a hard time trying to figure out what I need to do to get this to work. I'm learning ASP.NET MVC CodeFirst with EF. If I make a model I can simply add a controller for that model and add scaffolding to create views that automatically take care...
From examples that I have seen online and in a Programming Entity Framework CodeFirst book, when you have a collection on both classes EF would create a mapping table such as ...MembersRecipes... and the primary key from each class would link to this tabl...
I'm a newbie with MVC + EF Code First and have some doubts about many to many relationship. ...I created 2 tables that has many to many relationship (userprofile and courses).
Sounds simple but it got pretty complex for me: ...I want to see the "create" ...
I have some issues with a Many-to-many relationship saving the results of a create view....I want to do a create page for a new user profile that has a checklist that lets them choose courses (many to many relationship).
My view takes the records from the...
I am trying to build an Entity Framework 4 Many to Many relationship filter, this is for a Dynamic Data project. I know that I need to build an Expression Tree at run time, and I am familiar with doing this for something like a simple where expression li...
I have two entities with a fairly standard Many to Many relationship that I created in EF 5 Code First. These are Service and ServiceItem. The Service entity contains a collection of ServiceItems and the ServiceItem contains a collection of Services. I...
I'm working with ASP.NET MVC 4 and Entity Framework. In my database, I have a table ...Subscription... which represents a subscription to public transports. This subscription can provide access to several ...public transport companies... (so a subscriptio...