如何按字母顺序对我的姓名列表进行排序？

Question

I would like to know, how can i sort the names and surenames alphabetically in my list.

I'm not sure, but i googled and i'm guessing it only sort's by the name.

    public void FilterParticipants(List<string> players, PlayerContainer allPlayers)
    {
        for (int i = 0; i < allPlayers.Count; i++)
        {
            if (!players.Contains(allPlayers.FindName(i) + " " + allPlayers.FindSurname(i)))
            {
                players.Add(allPlayers.FindName(i) + " " + allPlayers.FindSurname(i));
            }
        }
        players.Sort();
    }

Answer 1

If you want to sort your player names by Surname and then Name and cannot change your design to have a List<Player> passed in, then here's one solution.

Note there's a slight design change, as it's usually better to return a new list rather than modifying the input list. Also, the method name is a little misleading. "Filter" implies that you're reducing the set of items based on some criteria, but in this case we're adding items if they don't exist, so I renamed it to GetCombinedParticipants .

Given that, here's one way you could implement it. Note that this design uses Substring to find the last space in the name, which is used as a delimeter between the first name and the last name (which therefore assumes that there are no spaces in the last name). If there are, then I don't know how you could possibly identify them from a List<string> , which is another good reason to create a Player class with separate FirstName and Surname poperties...

public List<string> GetCombinedParticipants(List<string> players, 
    PlayerContainer allPlayers)
{
    // Make a copy of the input list
    var results = players.ToList();

    for (int i = 0; i < allPlayers.Count; i++)
    {
        var fullName = $"{allPlayers.FindName(i)} {allPlayers.FindSurname(i)}";

        if (!results.Contains(fullName)) results.Add(fullName);
    }

    // Order by last name, then by first name
    return results
        .OrderBy(name => name.Substring(name.LastIndexOf(" ") + 1)) 
        .ThenBy(name => name.Substring(0, name.LastIndexOf(" ")))
        .ToList();
}