如何使用字符串和整数对文本文件进行排序

Question

I have recently been trying to make a code that sorts my text file into a text box, like a leader board. I have been trying to sort it by the high score or just alphabetically

How would I sort these using an insert or bubble sort?

Answer 1

If you want to sort something you have to break the data into an object that holds the individual parts in separated properties. Then you write an comparer for the kind of objects and apply that comparer.

Example with Comparer class:

public static class Program
{
    public static void Main()
    {
        var rawData = @"Guest 450
Ryan 300
Ryan 4850
Ryan 100
Guest 300
Guest 1800";

        var players = rawData
            .Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries)
            .Select(row => row.Split())
            .Select(elements => new Player { Name = elements[0], Score = int.Parse(elements[1]) })
            .ToList();

        players.Sort(PlayerComparer.Default);

        foreach (var player in players)
        {
            Console.WriteLine(player);
        }
    }
}

public class PlayerComparer : IComparer<Player>
{
    public static readonly IComparer<Player> Default = new PlayerComparer();

    public int Compare(Player x, Player y)
    {
        if (x == null)
            return -1;

        if (y == null)
            return 1;

        var scoreComparison = y.Score - x.Score;

        if (scoreComparison != 0)
            return scoreComparison;

        return StringComparer.OrdinalIgnoreCase.Compare(x.Name, y.Name);
    }
}

public class Player
{
    public string Name { get; set; }
    public int Score { get; set; }
    public override string ToString() => $"{Name} {Score}";
}

Depending on your needs you can also replace the usage of the comparer class with a LINQ query:

public static class Program
{
    public static void Main()
    {
        var rawData = @"Guest 450
Ryan 300
Ryan 4850
Ryan 100
Guest 300
Guest 1800";

        var players = rawData
            .Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries)
            .Select(row => row.Split())
            .Select(elements => new Player { Name = elements[0], Score = int.Parse(elements[1]) })
            .ToList();

        var sortedPlayers = players
            .OrderByDescending(player => player.Score)
            .ThenBy(player => player.Name);

        foreach (var player in sortedPlayers)
        {
            Console.WriteLine(player);
        }
    }
}

Answer 2

You can simply do this:

string path = "C:\\Users\\file\\Desktop\\test.txt";
string delim = ' ';

  string[] lines = File.ReadAllLines(path);
  List<Tuple<string, int>> users = new List<Tuple<string, int>>();

  foreach (string line in lines)
  {
    string[] keyValue = line.Split(delim);

    users.Add(new Tuple<string, int>(keyValue[0], int.Parse(keyValue[1])));
  }

  // sort by users
  users.Sort((x, y) => y.Item1.CompareTo(x.Item1));

  // sort by scores
  users.Sort((x, y) => y.Item2.CompareTo(x.Item2));

The error handling for int.Parse and line.Split has been left out.

Method2:

  string path = "C:\\Users\\user\\Desktop\\test.txt";

  // sorted scores
  var sortedPlayersByScores = File.ReadAllLines(path)
                                  .Select(line => line.Split(' '))
                                  .Select(elem => new 
                                   Tuple<string, int>(elem[0], int.Parse(elem[1])))
                                  .OrderBy(x => x.Item2);

  // sorted players by name
  var sortedPlayersByName = File.ReadAllLines(path)
                                .Select(line => line.Split(' '))
                                .Select(elem => new 
                                 Tuple<string, int>(elem[0], int.Parse(elem[1])))
                                .OrderBy(x => x.Item1);