Question

Iam having a serious problems with Linq. I have simple sql query:

 select 
    intMiesiac, 
    intRok, 
    Sum(intIn) as 'In',
    Sum(intOut) as 'Out' 
from dbo.GlobalDane 
where intRampNr=1 
group by intMiesiac, intRok

I query for sum of in and out for specified intRampNr and want it to be grouped by Month and Year.
Tried very various queries in linq but when i put result of query into datasource of gridview and then bind datasource it fails or it shows me only empty cells.
How I can create same statment in linq under C#?

Answer 1

Something like the following will do it for you:

var results = 
    dataContext.GlobalDanes
    .Where(gd => gd.intRampNr == 1)
    .GroupBy(
        gd =>
            new 
            {
                 gd.intMiesiac,
                 gd.intRok,
            })
    .Select(
        grp =>
            new 
            {
                grp.Key.intMiesiac,
                grp.Key.intRok,
                In = grp.Sum(gd => gd.intIn),
                Out = grp.Sum(gd => gd.inOut),
            });