How to get sum of all items? - asp.net

Question

I'm trying to get sum of all items of cars. But i'm just getting sum of each items, which you can see here Link
So how can I get sum of all items, like the sum is (4), instead of getting each items?
Controller:
public ActionResult Home()
{
var model = new CompositeModel();
model.CountCars = getCountOfCars();
return View(model);
}
private IEnumerable<CountCarsrCountView> getCountOfCars()
{
var countCars = this.Data.Cars.All()
.Select(t => new CountCarsrCountView
{
counter = t.Cars.Count()
});
return countCars ;
}
ViewModel
public class CountCarsViewModel
{
public int counter { get; set; }
}
CompositeModel
public class CompositeModel
{
public IEnumerable<CountCarsViewModel> CountCars { get; set; }
}
View
#model CompositeModel
<div class="container">
#for (int i = 0; i < Model.CountCarsViewModel.Count(); i++)
{
var cars = Model.CountCarsViewModel.ElementAt(i);
<p>#cars.counter</p>
}
</div>
Car model:
public class Car
{
[Key]
public int Id { get; set; }
public string Title { get; set; }
public string Description { get; set; }
public int Price { get; set; }
public virtual Category Category { get; set; }
public int CategoryId { get; set; }
public int FilePathId { get; set; }
public string FileName { get; set; }
public string UserId { get; set; }
public virtual User Users { get; set; }
}

Answer 1

You can use Linq as so:
public class MyItem
{
public int MyCount { get; set; }
}
public List<MyItem> AllItems { get; set; }
In this example if you want the count of all items in the list you would do this:
var count = AllItems.Count();
If you wanted to sum the Counts of all items in the list you would do this:
var count2 = AllItems.Sum(a => a.MyCount);
Example:
AllItems = new List<UserQuery.MyItem>()
{
new MyItem(){ MyCount = 3 },
new MyItem(){ MyCount = 4 },
};
var count = AllItems.Count(); // This would be 2
var count2 = AllItems.Sum(a => a.MyCount); // This would be 7