c# - Linq - 每个组的最高值

Question

我如何使用 Linq 从每个组中选择最高值

当我有这样的代码段时:

var teams = new Team[]
 { 
  new Team{PlayerName="Ricky",TeamName="Australia", PlayerScore=234},
  new Team{PlayerName="Hussy",TeamName="Australia", PlayerScore=134},
  new Team{PlayerName="Clark",TeamName="Australia", PlayerScore=334},

  new Team{PlayerName="Sankakara",TeamName="SriLanka", PlayerScore=34},
  new Team{PlayerName="Udana",TeamName="SriLanka", PlayerScore=56},
  new Team{PlayerName="Jayasurya",TeamName="SriLanka", PlayerScore=433},

 new Team{PlayerName="Flintop",TeamName="England", PlayerScore=111},
 new Team{PlayerName="Hamirson",TeamName="England", PlayerScore=13},
 new Team{PlayerName="Colingwood",TeamName="England", PlayerScore=421}
 };

期望的结果:

Team Name         Player Name     Score

Srilanka          Jayasurya        433

England           colingwood       421

Australia         Clark            334 

Answer 1

我的回答与 Yuriy 的类似，但使用了 MaxBy来自 MoreLINQ ，不需要通过整数进行比较:

var query = from player in players
            group player by player.TeamName into team
            select team.MaxBy(p => p.PlayerScore);

foreach (Player player in query)
{
    Console.WriteLine("{0}: {1} ({2})",
        player.TeamName,
        player.PlayerName,
        player.PlayerScore);
}

请注意，我已将类型名称从“Team”更改为“Player”，因为我认为这更有意义 - 你不是从一组团队开始，而是从一组球员开始。