Sort lines in a text file by value

Question

I would like to like the WPF application saves time similar to the one in the rankings. Time and number of attempts is not a problem to list but the problem occurs when I want to sort it in a text file. The user will be able to turn on the leaderboard in a text file as well as when the application is completed, the chart (text file) will open and show the user's time.

 private void writeText(string strPath, TimeSpan tsDuration)
    {
        using (StreamWriter str = new StreamWriter(strPath, true))
        {
            str.WriteLine(tsDuration / suma);
            //duration= time of the game
          //suma= number of attempts
        }
    }
readonly string path = @"C:\Users\info\Desktop\žebříček.txt";
TimeSpan duration = TimeSpan.FromMilliseconds(mt.ElapsedMilliseconds);//this is from other methods

The picture is seen as it is stored now:

But I would like it to be stored like this, and the other attempts were sorted by the value of time:

Each time the application is completed, the user's new time should be sorted by how fast it was. I will be happy for any advice

Thank you

Answer 1

I'm sure there are much smarter ways of achieving the same result but a very simple way would be to:

• Read the contents of the file
• Assign the contents to a list
• Append your value to the list
• Use linq to order the list accordingly
• Write the list back to the file

Example:

using System.Collections.Generic;
using System.IO;
using System.Linq;

private void WriteText(string strPath, TimeSpan tsDuration)
{
    //Create new list of type 'TimeSpan'
    var list = new List<TimeSpan>();

    //Read the contents of the file and assign to list
    string line;
    using (var sr = new StreamReader(strPath))
    {
        while ((line = sr.ReadLine()) != null)
        {
            list.Add(TimeSpan.Parse(line));
        }
    }

    //Add your time value to the list
    list.Add(tsDuration);

    //Order the list in descending order - use OrderBy for ascending
    list.OrderByDescending(i => i);

    //Write contents back to file - note: append = false
    using StreamWriter str = new StreamWriter(strPath, false);
    foreach (var item in list)
    {
        str.WriteLine(item);
    }
}

readonly string path = @"C:\Users\info\Desktop\žebříček.txt";
TimeSpan duration = TimeSpan.FromMilliseconds(mt.ElapsedMilliseconds);//this is from other methods