Hi I have here a code snippet. This isn't mine, I saw this in the internet while learning on how to deal with Entity Framework
I know it just including (eager load) the navigation properties then return it as IQueryable
What I want to know is:
How do you read this parameter params System.Linq.Expressions.Expression<Func<T, object>>[] includeProperties
?
How do you call or use this function? (Should pass collection, am I right? A little example would be a great help since I learn in a way when I see some demo)
public IQueryable<Customer> AllIncluding(params System.Linq.Expressions.Expression<Func<T, object>>[] includeProperties) { var query = context.Customers; foreach (var includeProperty in includeProperties) { query = query.Include(includeProperty); } return query; }
Any help would be much appreciated. Thanks!
params
lets you pass an array parameter as an actual array or an open-ended list of values:
var includes = new Expression<Func<Customer, object>>[]
{
i => i.SubProperty1,
i => i.SubProperty2
};
var query = db.Entities.AllIncluding(includes);
or just
var query = db.Entities.AllIncluding(i => i.SubProperty1, i => i.SubProperty2);
I'm guessing on the specific types and properties, but hopefully you get the idea.
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