I'm using Self Tracking Entities and have a scenario where I have an entity that represents a table that we'll call table A. A is a parent to another table B which is also represented as an entity. On my WinForm I have 3 different binding sources that each represent different types of records from table B but all are children of table A....
I have a problem updating a foreign key in an Entity Framework entity. I am using self tracking entities and have an entity with some relations where the foreign key is also present as a property (one of the new features of EF4). The key (an integer) is marked as Nullable and Concurrency Mode fixed. Specifically I have an Alarm entity w...
I am trying to establish a good practice for working with secondary keys when using self tracking entities and entity framework 4, but there seems to be a lot of pitfalls. Lets say I have an Alarm entity, that can have ConfirmingUser navigational property to a User. The User has an Id as primary key and a "Login" as secondary key. At so...
I am using Entity Framework with the Self-Tracking Entity T4 templates, which by default will generate a SQL Query setting all the properties on the Entity in an UPDATE statement. I only want an UPDATE statement that contains the properties modified. I modified the T4 Template as specified in the book: Entity Framework Recipes: A Probl...
I have a project utilizing EF4 and Self Tracking Entities (STE). In the pre-release version of STE's you could add the "Namespace" value to each EDMX different from the default Namespace of the current project. (Open EDMX, right click: Properties, Set the "Namespace" attribute.) When you set this in the pre-release version and use the...
Hello all. I work with a senior developer who is a guru .NET architect. We have had many constructive arguments over the last 6+ months and generally I concede defeat in most of our discussions. I have learned stacks from working with him. There is one design problem we are currently in disagreement with, however, and I would like some ...
I have a WPF application consuming data using Entity Framework 4 and Self-Tracking Entities. In which I have a window with 2 controls in it, one that shows the "Details" portion of an object using a ContentControl and templates from a merged resource dictionary. Another with a ListBox of Groups the object in question belongs to and a Com...
Hi guys! I’m developing a Silverlight 4 application using STE with EF4. I created a Silverlight project with all the Entity classes generated with my STE T4 template and build properly on VS. But when I add a WCF proxy with Visual Studio and check the “Reuse types in reference assemblies” (having a referece to my Client.Model assembly w...
Hi I'm using self-tracking entities in a WCF client-server application. My WCF service returns various entities, and these can be updated using corresponding Update methods. This worked well for a while, but now I'm having problems. To keep the focus, I'l limit this discussion to a specific case, simplified to the bare essentials. One...
How can I deserialize JSON string into entity of type like this (self-tracking properties removed to be simple): public class User: { int Id { get; set; } string Name { get; set; } public TrackableCollection<Role> Roles { get; set; } // <! } Role is also simple class with two properties. TrackableCollection is descendant ...
Hi, Can someone point me the difference between POCO , Self Tracking Entities , POCO Proxies? Actually, I am working Entity Framework 4.0 and POCO(Repository Pattern) and whenever I do some changes in the POCO and call ObjectContext.Savechanges then it reflects to the DB. My question is, How does the Context persist the change to t...
Hi I have tables Movie - ID, Name, Description, DirectorID-Fk, MusicID-Fk Director - ID, Name Music - ID, MusicName Now I am trying to insert a new record to movie but I dont know whether Director is already existing in the DB and same with the Music). From UI i am taking all movie information, DirectorName and MusicName. Now wh...