c# - LINQ 中的嵌套匿名类型

Question

我正在尝试使用 LINQ 构建自定义结果集。目前，我有以下内容:

List<Team> teams = Team.FindAll();
List<Player> players = Player.FindAll();

var results = (from player in players
               select new
               {
                 PlayerId = player.Id,
                 PlayerName = player.Name,
                 Teams = teams.Where(t => player.TeamsIds.Contains(t.TeamId)).ToList() 
               });

我希望 Teams 成为一种新的自定义类型。我希望该类型有一个名为 IsChecked、TeamId 和 TeamName 的字段。但是，每个团队目前只有 TeamId 和 TeamName。如何在此 LINQ 语句中添加 IsChecked 属性？有没有办法嵌套“选择新”语句？如果是，怎么办？

谢谢？

Answer 1

当然，只需将其添加为投影:

var results = (from player in players
               select new
               {
                 PlayerId = player.Id,
                 PlayerName = player.Name,
                 Teams = teams.Where(t => player.TeamsIds.Contains(t.TeamId))
                              .Select(t => new {
                                                   t.TeamId,
                                                   t.TeamName,
                                                   IsChecked = ???
                                               }
                              .ToList() 
               });

或使用查询语法

var results = (from player in players
               select new
               {
                 PlayerId = player.Id,
                 PlayerName = player.Name,
                 Teams = (from t in teams
                          where player.TeamsIds.Contains(t.TeamId)
                          select new {
                                         t.TeamId,
                                         t.TeamName,
                                         IsChecked = ???
                                     }
                         ).ToList() 
               });