Question

I have table Products where I store my products and another table Votes which cointains user votes for that products.

Product:
ID
Name
Price
etc..

Votes:
ID
ProductID
IpAdress
DateTimeCreated

How would I get most voted products in last 24 hours in linq to sql? I’m really not that good with L2S to figure it on my own.

This is closest I got so far, this snippet should get last 10 voted, but I need top voted in last 24h:

 var last10Voted = (from vote in context.Votes join product in 
 context.Products on vote.ProductID equals
 product.ID orderby vote.DateTimeCreated select product).Take(10);

Answer 1

var topVotedProducts = 
    Votes.Where(v => v.DateTimeCreated > DateTime.Now.AddHours(-24))
        .GroupBy(v => v.ProductID)
        .Join(Products, g => g.Key, p => p.ID, (g,p) => new { cnt = g.Count(), prod = p.Name })
        .OrderByDescending(result => result.cnt);

Product:
ID
Name
Price
etc..

Votes:
ID
ProductID
IpAdress
DateTimeCreated