Question

I have a record that came from the follow linq query:

using (var context = new myEntities())
{
     var record = (from d in context.Student select d).SingleOrDefault();
}

I typically assign a new value to the record like this:

record.Value = SomeNewValue;

then I would do a

context.SaveChanges;

this all works fine. My question is: How can I save the same record if I pass it to another function or if the record was returned from a function? I am looking for something like this:

context.SaveChanges(record);

Answer 1

The operation which triggers your function in question should create and manage the context. If it was an ASP.NET MVC app I’d encourage you to set up the context at the beginning of the request and call context.SaveChanges when it was finished. In a winforms/WPF app, you may want to keep the context around for the life of the application, and call context.SaveChanges() after any action that could change data (like a button press).