I’m using Entity Framework 4.1 Code First Fluent API.
The problem. I have an Entity Framework model being used in the business layer called Patient, it has a collection of dependent entities called Responses, when a response needs to be deleted I simply remove it from the collection and expect that it’ll get deleted from the database. It doesn’t. Read the rest of this entry »
September 6th, 2011
June 10th, 2011
Need to perform validation on a model’s property based on some other state of the model? Here’s a way to achieve it using the IValidatableObject interface and data annotations.
In our example project we want to validate the state field is a valid Australian state if the country field is “Australia”.
March 11th, 2011
There’s plenty of examples on how to find duplicates using LINQ’s GroupBy method, but usually they use a projection to return a new object, like this:
_filteredSubmissions = (from s in _filteredSubmissions
group s by s.Email
into g
where g.Count() > 1
select new { Emails = g.Key, DuplicateCount = g.Count() }
