To write query for sum in LINQ C#

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i have studentno field in my table, i want sum of all the student,so plz help me in doing that in LinQ C#

Posted 4-Dec-12 21:51pm

tusharN

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bbirajdar 5-Dec-12 4:08am

" i want sum of all the student"

You cannot have SUM of students.. You can have sum of marks or count of students

4 solutions

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Prasad_Kulkarni · Answer 1 · 2012-12-05T19:07:00

Solution 4

Try this:

C#

FROM p in m.Items
group p by p.Id into g
select new
{
    SumTotal = g.Sum(x => x.Total),
    SumDone = g.Sum(x => x.Done)
};

Found it here[^]

Check out:
link 1[^]
link 2[^]

Posted 5-Dec-12 19:07pm

Prasad_Kulkarni

Krunal Rohit · Answer 2 · 2012-12-04T21:57:00

Solution 1

MSDN[^] will help you :)

Posted 4-Dec-12 21:57pm

Krunal Rohit

bhavesh002 · Answer 3 · 2012-12-05T03:45:00

Solution 2

i not get your question clearly i think u want to count number of student in that case
write query like

var id=(from a in linq_obj.tablename
select a).Tolist();
int count=id.count();

in this count give u no of student

Posted 5-Dec-12 3:45am

bhavesh002

(__Aaron__) · Answer 4 · 2012-12-05T19:04:00

Solution 3

worth reading How does it work in C#? - Part 3 (C# LINQ in detail)[^]

Posted 5-Dec-12 19:04pm

(__Aaron__)