Linq to CSV select by column value - linq

Question

I know I have asked this question in a different manner earlier today but I have refined my needs a little better.
Given the following csv file where the first column is the title and there could be any number of columns;
year,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017
income,1000,1500,2000,2100,2100,2100,2100,2100,2100,2100
dividends,100,200,300,300,300,300,300,300,300,300
net profit,1100,1700,2300,2400,2400,2400,2400,2400,2400,2400
expenses,500,600,500,400,400,400,400,400,400,400
profit,600,1100,1800,2000,2000,2000,2000,2000,2000,2000
How do I select the profit value for a given year? So I may provide a year of say 2011 and expect to get the profit value of 2000 back.
At the moment I have this which shows the profit value for each year but ideally I'd like to specify the year and get the profit value;
var data = File.ReadAllLines(fileName)
.Select(
l => {
var split = l.Split(",".ToCharArray());
return split;
}
);
var profit = (from p in data where p[0] == profitFieldName select p).SingleOrDefault();
var years = (from p in data where p[0] == yearFieldName select p).FirstOrDefault();
int columnCount = years.Count() ;
for (int t = 1; t < columnCount; t++)
Console.WriteLine("{0} : ${1}", years[t], profit[t]);

Answer 1

I've already answered this once today, but this answer is a little more fleshed out and hopefully clearer.
string rowName = "profit";
string year = "2011";
var yearRow = data.First();
var yearIndex = Array.IndexOf(yearRow, year);
// get your 'profits' row, or whatever row you want
var row = data.Single(d => d[0] == rowName);
// return the appropriate index for that row.
return row[yearIndex];
This works for me.

Answer 2

You have an unfortunate data format, but I think the best thing to do is just to define a class, create a list, and then use your inputs to create objects to add to the list. Then you can do whatever querying you need to get your desired results.
class MyData
{
public string Year { get; set; }
public decimal Income { get; set; }
public decimal Dividends { get; set; }
public decimal NetProfit { get; set; }
public decimal Expenses { get; set; }
public decimal Profit { get; set; }
}
// ...
string dataFile = #"C:\Temp\data.txt";
List<MyData> list = new List<MyData>();
using (StreamReader reader = new StreamReader(dataFile))
{
string[] years = reader.ReadLine().Split(',');
string[] incomes = reader.ReadLine().Split(',');
string[] dividends = reader.ReadLine().Split(',');
string[] netProfits = reader.ReadLine().Split(',');
string[] expenses = reader.ReadLine().Split(',');
string[] profits = reader.ReadLine().Split(',');
for (int i = 1; i < years.Length; i++) // index 0 is a title
{
MyData myData = new MyData();
myData.Year = years[i];
myData.Income = decimal.Parse(incomes[i]);
myData.Dividends = decimal.Parse(dividends[i]);
myData.NetProfit = decimal.Parse(netProfits[i]);
myData.Expenses = decimal.Parse(expenses[i]);
myData.Profit = decimal.Parse(profits[i]);
list.Add(myData);
}
}
// query for whatever data you need
decimal maxProfit = list.Max(data => data.Profit);