This is cool. I never thought Linq was so rich with enumarable manipulation. I was so ‘stick’ to C++ pointers model and C# foreach..loop. Now I need to change my paradigm for arrays using Linq. Nice article.

What exactly isn’t working for you? Do you get exceptions? Or compile errors? Or wrong results?

It is hard to tell from the complex query what your problem may be.

I have tried several things but everything falls apart after three levels. I’m sure I just don’t understand it that well yet. I have tried:

var query = from nRow in newDT2.AsEnumerable()
group nRow by nRow.Field(“agency_group”) into agency_group
select new
{
ag = agency_group.AsEnumerable(),
agK = agency_group.Key,
agency_names =
from agency_names in agency_group
group agency_names by agency_names.Field(“agency_name”) into agency_names_group
select new
{
an = agency_names_group.AsEnumerable(),
anK = agency_names_group.Key,
div_depts =
from div_depts in agency_names_group
group div_depts by div_depts.Field(“div_dept”) into div_depts_group
select new
{
dd = div_depts_group.AsEnumerable(),
ddK = div_depts_group.Key,
unit_sections =
from unit_section in div_depts_group
group unit_section by unit_section.Field(“unit_section”) into unit_section_groups
select new
{
us = unit_section_groups.AsEnumerable(),
usK = unit_section_groups.Key,
group_unit_req =
from gur in unit_section_groups
group gur by gur.Field(“group_unit_requirement”)
}
}
}
};

and

var query = from nRow in newDT.AsEnumerable()
group nRow by nRow.Field(“agency_group”) into agency_group
from agency_name in
(from nRow in agency_group
group nRow by nRow.Field(“agency_name”) into agency_name_group
from division_name in
(from nRow in agency_name_group
group nRow by nRow.Field(“div_dept”))
group division_name by agency_name_group)
group agency_name by agency_group;

But something just isn’t working for me. I’ve looked all over and can’t find anything that goes that deep. Any help you can provide is greatly appreciate.

Have a good day.