LINQ中For循環的等效代碼

Question

我是LINQ的新手。

playerData是list<DataAccess.Team>，我想用playerData的數據初始化另一個playerViewModelList列表。我試過foreach。

foreach (DataAccess.Team dataTeam in playerData) 
{ 
    playerViewModelList.Add(new PlayersViewModel 
    { 
     PicPath = dataTeam.Tied.ToString(), 
     PlayerID = (int)dataTeam.ID, 
     PlayerName = dataTeam.TeamName 
    }); 
    } 

使用LINQ可以達到同樣的效果嗎？

Answer 1

Select在這種情況下，相當於：

playerViewModelList = playerData.Select(dataTeam => new PlayersViewModel 
             { 
              PicPath = dataTeam.Tied.ToString(), 
              PlayerID = (int)dataTeam.ID, 
              PlayerName = dataTeam.TeamName 
             }).ToList(); 

。當然，這是假定playerViewModelList是List<PlayersViewModel>或類似的東西。如果您不能覆蓋playerViewModelList，只需使用foreach循環即可。

Answer 2

playerData.ForEach(d => playerViewModelList.Add(new PlayersViewModel { 
    PicPath = d.Tied.ToString(), 
    PlayerID = (int)d.ID, 
    PlayerName = d.TeamName 
})); 

或

playerViewModelList.AddRange(playerData.Select(d => new PlayersViewModel { 
    PicPath = d.Tied.ToString(), 
    PlayerID = (int)d.ID, 
    PlayerName = d.TeamName 
})); 

Answer 3

或者，你有兩面List<>：

playerViewModelList = playerData.ConvertAll(dataTeam => new PlayersViewModel 
    { 
    PicPath = dataTeam.Tied.ToString(), 
    PlayerID = (int)dataTeam.ID, 
    PlayerName = dataTeam.TeamName 
    });