grouping the elements within a List

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Hi,

I gave a List

Name  Dep  YearofJoin
====================
x     d     2010
y     d     2010

a     g     2010
b     g     2010
c     g     2012
====================

I want to group the elements based on Dep and then group then based on yearOf Joining

I am using groupby(dep) but am not able to move further.

Any suggestion.

[edit]Code block added - OriginalGriff[/edit]

Posted 16-May-13 20:50pm

rohit24c

Updated 16-May-13 21:57pm

OriginalGriff

v2

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kumar2413 17-May-13 2:58am

What would your output look then?gv some sample output then can help you well

rohit24c 17-May-13 3:17am

Name Dep YearofJoin
====================
x d 2010
y d 2010

a g 2010
b g 2010
c g 2012
====================
from this i want (y d 2010) & ((b g 2010) & (c g 2012))

Mean to say after groupby(Dep) i will get 2 groups from that group i want 1 more group

kumar2413 17-May-13 3:27am

The question not very clear bro

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debkumar@codeproject · Answer 1 · 2013-05-17T09:57:00

According to your query, those names would come under one group which has same Dep and same YearofJoin. Therefore, from the given example, we would get 3 groups (2010_d), (2010_g) and (2012_g)

C#

var studentGroups = from s in students
	group s by string.Format("{0}_{1}", s.YearofJoin, s.Dep) into g
	select new { GroupId = g.Key, StudentInfo = g };


foreach (var sg in studentGroups)
{
	foreach (var s in sg.StudentInfo)
	{
	}
}