Sorting and Subtotaling

[spowel4]

Given a comma-delimited file like this example:

"92528","1","36","38280","51801","PLANT 5 - LINE 1","37",
"92528","1","8","37450","51801","PLANT 5 - LINE 1","37",
"92528","2","8","37896","51801","PLANT 5 - LINE 1","37",
"92528","3","8","37450","51801","PLANT 5 - LINE 1","37",
"92528","61","32","37450","51802","PLANT 5 - LINE 2","37",
"92528","62","16","38721","51802","PLANT 5 - LINE 2","37",
"92528","63","8","38722","51802","PLANT 5 - LINE 2","37",
"92528","64","4","37450","51802","PLANT 5 - LINE 2","37",
"92528","149","8","37450","51804","PLANT 5 - LINE 4","37",
"92528","150","2","38668","51804","PLANT 5 - LINE 4","37",
"92528","151","8","37450","51804","PLANT 5 - LINE 4","37",
"92528","152","2","38668","51804","PLANT 5 - LINE 4","37",

I need to sort it first by the 6th field of each line ("PLANT 5 - LINE 1" on the first line),
then by the 4th field of each line ("38280" on the first line); then I need to get a subtotal for each item in the 4th field so that I only end up with 1 line per item within each plant.
I need to end up with this:

"PLANT 5 - LINE 1","37450","16"
"PLANT 5 - LINE 1","37896","8"
"PLANT 5 - LINE 1","38280","36"
"PLANT 5 - LINE 2","37450","36"
"PLANT 5 - LINE 2","38721","16"
"PLANT 5 - LINE 2","38722","8"
"PLANT 5 - LINE 4","38668","4"
"PLANT 5 - LINE 4","37450","16"

Not sure where to start on this, can someone offer suggestions?

[AleMonteiro]

I'd start parsing the text file data into a object model and keep it in an list, like List<Product>.

Then I'd use the generic sorting functionalities for performing the sort, this you can see at http://www.codeproject.com/Tips/323985/Sorting-using-Csharp-Lists

[ddanbe]

Or you could drop your data in a DataGridView and use some of the many properties and methods of this rather big, but very usefull object. See this example.

[spowel4]

Here's what I've done so far, and it appears to be sorting correctly:

            DataTable dtResult;

            using (GenericParsing.GenericParserAdapter p = new GenericParsing.GenericParserAdapter(@"s:\hp\haylin.csv"))
            {
                dtResult = p.GetDataTable();
            }

            DataView dv = dtResult.DefaultView;
            dv.Sort = "Column6, Column4 ASC";
            DataTable dt2 = dv.ToTable("Table2");

Can you offer some suggestions on how to do the next step, which is to get subtotals per item?

[TnTinMN]

DataTable.Compute Method