在反向列表中显示字典

Question

我想要做的是在反向列表中显示我的字典：就这么简单。

static Dictionary<string, Team> teams = new Dictionary<string, Team>();

static void AllTeams()
{
    Console.WriteLine("=============== Teams ===============");
    foreach (KeyValuePair<string, Team> keyValue in teams)
    {
           
        Console.WriteLine(keyValue.Key.ToString());
    }
}

Answer 1

正如您在示例中仅使用Keys ( string s) 进行输出，因此您可以通过以下方式仅按Keys反转或排序：

void Main(string[] args = default)
{
    teams.Add("BTeam", null);
    teams.Add("HTeam", null);
    teams.Add("ATeam", null);
    teams.Add("STeam", null);
    teams.Add("4Team", null);
    teams.Add("ZTeam", null);

    Console.WriteLine("=============== Teams (Original) ===============");

    foreach (string key in teams.Keys)
        Console.WriteLine(key);

    Console.WriteLine("=============== Teams (Reversed) ===============");

    foreach (string key in teams.Keys.Reverse())
        Console.WriteLine(key);

    Console.WriteLine("=============== Teams (Ordered ascending) ===============");

    foreach (string key in teams.Keys.OrderBy(x => x))
        Console.WriteLine(key);

    Console.WriteLine("=============== Teams (Ordered descending) ===============");

    foreach (string key in teams.Keys.OrderByDescending(x => x))
        Console.WriteLine(key);
}

输出：

只有你需要 - 添加一个using System.Linq; 访问.OrderBy(...) .Reverse() 、 .OrderBy(...)和.OrderByDescending(...)扩展方法。