CODEWITHSUNDEEP
c#sortingdate
Silva
Silva

Reputation: 45

C# sorting files by date and time

I've problem with sorting files by date; this's my sample code :

    string[] files = new string {"file1.txt", "file3.txt", "file4.txt"}
    var list = new List<string> {"10/03/2015", "01/01/2015", "20/08/2015"};
    list.Sort((a, b) => a.CompareTo(b));

I wanna get in the output all files sorting by date without losing the order between each file and its time:

// file3.txt  01/01/2015
// file1.txt  10/03/2015
// file4.txt  20/08/2015

So my question is how can I according files to sort of date, Thanks :)

Upvotes: 0

Views: 992

Answers (2)

spender
spender

Reputation: 120420

Easily done with Linq. First, Zip together your two collections and parse the dates:

var filesAndDates = files
     .Zip(list,
          (filename,dateString) => new{filename, 
                                       date = DateTime.ParseExact(
                                                dateString,
                                                "dd/MM/yyyy",
                                                CultureInfo.InvariantCulture)});

then order them:

var orderedFilesAndDates = filesAndDates.OrderBy(x => x.date);

I find myself wondering how you ended with 2 "synchronized" lists of stuff. You could make a composite type and keep them in a single list. It's far easier to manage that way...

Upvotes: 1

Daniel Yochpaz
Daniel Yochpaz

Reputation: 13

first you need to parse the values to DateTime type and then do sort.

Upvotes: 0

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