How to use Linq to group and SUM

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Hi, I have a Product class with
ProductName
Category
Price

and I want to display an information like this:

ProductName | Category | Price

XXXVVVXXXX         |   Category1    |    10
XXYZXXXXXX       |  Category1     |   15

Total Category1:     35

YYYY    |    Category2   |     05
YYVV    |   Category2    |   10
TTTT    |  Category2      |   11

Total Category2:     26

Total All Categories 61

How could I do this using Linq ?
I appreciate all suggestions.
I'm using asp.net MVC 4.

Posted 18-Mar-14 2:28am

nataliaps

Updated 18-Mar-14 2:44am

Tejas Vaishnav

v2

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Dennis_E · Accepted Answer · 2014-03-24T03:50:00

Solution 1

Perhaps something like this?

C#

var query =
    from p in Products
    group p by p.Category into g
    select new { Category = g.Key, Total = g.Sum(p => p.Price), Values = g };

See it working:
http://ideone.com/ckhFNq

But it would be more efficient just to calculate the total with a for-loop.

Posted 24-Mar-14 3:50am

Dennis_E

Comments

Maciej Los 24-Mar-14 16:35pm

Good answer, but i must to disagree with this part: But it would be more efficient just to calculate the total with a for-loop

Dennis_E 26-Mar-14 5:07am

Yeah, I don't know what I was thinking there... Never mind that part.