Question

I have a service function to query a SQL db like so:

public IQueryable<MyModel> getAll()
{
    IQueryable<MyModel> models = (from f in db.MyModel select f);

    return models;
}

When I implement it in my controller it works when I chain the Take():

var models = myModelEntities.getAll().Take(5); 
return View(models); // returns 5 rows to the view

But like this it doesn’t:

var models = myModelEntities.getAll();
models.Take(5); 
return View(models); // returns thousands of rows to the view

Why is Take() ignored if it’s not chained? I have Lazy Loading enabled on my model…

Answer 1

It does work, but you’re not assigning the result of Take() to anything. Take() doesn’t mutate the models variable, it returns the top 5 items in the enumerable.

The following would work:

var models = myModelEntities.getAll();
models = models.Take(5); 
return View(models); // returns five rows to the view