LINQ and IEnumerable?

[Ivan]

Hello!

I read this article
http://www.lostechies.com/blogs/jim...uery-operators-lose-that-foreach-already.aspx

Well, those shortcuts look great and I'd like to use it.

I have order object and Items property (IEnumerable)
When I type Items. I don't get anything in intellisence and I want to use
aggregates to expose totals, etc
Currently I use foreach.

What am I doing wrong?

Thanks,
Ivan

 

[Ivan]

Trying your example:

decimal ss = (decimal)(from a in Items select (decimal) a.Price).Sum();

Get error:

Error 21 Could not find an implementation of the query pattern for source
type 'System.Collections.IEnumerable'. 'Select' not found. Consider
explicitly specifying the type of the range variable 'a'.

 

[Ivan]

Trying your example:

decimal ss = (decimal)(from a in Items select (decimal) a.Price).Sum();

Get error:

Error 21 Could not find an implementation of the query pattern for source
type 'System.Collections.IEnumerable'. 'Select' not found. Consider
explicitly specifying the type of the range variable 'a'.

 

[Ivan]

Same error:

Error 21 Could not find an implementation of the query pattern for source
type 'System.Collections.IEnumerable'. 'Select' not found. Consider
explicitly specifying the type of the range variable 'a'.

 

[Ivan]

Same error:

Error 21 Could not find an implementation of the query pattern for source
type 'System.Collections.IEnumerable'. 'Select' not found. Consider
explicitly specifying the type of the range variable 'a'.