Write equivalent to the above codes in linq&lambda

Question

1.00/5 (3 votes)

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Select IdSystem, Count(*)
from [DBTurboRAM-TT].[dbo].[TblCMMS]
Where
IdUnit = 10 and IdSection = 5 Group By IdSystem Order By Count(*) DESC

hello dear all programming
how to write Equivalent to the above codes in linq&lambda?
please help me
regards yarian

What I have tried:

Select IdSystem, Count(*)
from [DBTurboRAM-TT].[dbo].[TblCMMS]
Where
IdUnit = 10 and IdSection = 5 Group By IdSystem Order By Count(*) DESC

hello dear all programming
how to write Equivalent to the above codes in linq&lambda?
please help me
regards yarian

Posted 11-Dec-16 17:58pm

misaqyrn9677

Updated 11-Dec-16 18:32pm

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dan!sh 12-Dec-16 0:30am

People here are volunteers. You can't expect them to do your work. Please try doing the task yourself and comeback with specific questions.

Jon McKee 12-Dec-16 0:33am

Lol, I was bored =S Also I see a lot of groupby/orderby confusion with a computed value like a count and all that so it may be useful to have an example laying around I suppose.

dan!sh 14-Dec-16 2:01am

Still bored? OP posted another question with same "request".

Jon McKee 14-Dec-16 9:54am

Everything he needs is already right here. The only thing new would be Sum() and Take(). I'll let him figure that one out on his own =)

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Jon McKee · Accepted Answer · 2016-12-11T18:32:00

C#

var query = from row in table
            where row.IdUnit == 10 && row.IdSection == 5
            group row by row.IdSystem into rowGroup
            let count = rowGroup.Count()
            orderby count descending
            select new { IdSystem = rowGroup.Key, Count = count };

Replace table with whatever you're using to access the database =)