Question

How do I formulate the following in LINQ with LAMBDA expressions.

Given (for simplicity – this is actually later a join) a table with the fields:

• Item
• Price
• Timestamp

which is mapped to a class. I use BlToolkit, but could also be LINQ or EF – makes no difference.

I want the object with Item = 2 and the highest timestamp (newest) and / or a query of ALL items but ONLY the most current object.

How do I formulate this?

I understand there will likely be a subselect involved, but I have a problem finding the correct syntax.

Answer 1

Using fluent syntax, the item with the highest timestamp, and Item==2 is:

var item= table.Where(i => i.Item == 2)
               .OrderByDescending(i => i.Timestamp)
               .SingleOrDefault();