C# Data structure to sort against specific values

Question

I have an output of a method that provides two key pieces of data per result. Eg: 20160503 and nzdusd.

How can I store this in a dictionary and the sort against either one? I want to be able to sort against key or value but can't get past adding the data! Is there another data structure better suited?

Previously I tried simply calling Add()

But got an ArgumentException with message, An item with the same key has already been added..

Dictionary<string, string> missingDays = new Dictionary<string, string>();

// Some logic
missingDays.Add(formattedDate, fxPair); // Exception here

foreach (var missingDay in missingDays)
                {
                    Console.WriteLine(missingDay);
                }

TimS · Accepted Answer · 2016-07-29 02:39:31Z

3

A dictionary must have unique key values. In this case the formattedDate variable is being assigned the same value more than once, which causes an exception the second time you try to add an entry to the dictionary with the same formattedDate value.

You can use a Tuple<string, string> inside a list (List<Tuple<string, string>>) to store the values, and then use the LINQ method OrderBy() to sort the list.

var missingDays = new List<Tuple<string, string>>();

missingDays.Add(Tuple.Create("exampleFormattedDate", "exampleFxPair"));

foreach (var missingDay in missingDays.OrderBy(md => md.Item1))
{
    Console.WriteLine(missingDay);
}

edited Jul 29, 2016 at 2:39

answered Jul 29, 2016 at 2:33

TimS

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