排序ArrayList中包括自定義結構

Question

我寫了一個struct

public struct SeasonEpisodeNr { public int seasonNr; public int episodeNr; }

在我的計劃，我將這些結構添加到一個ArrayList。我如何分類？我試過IComparer，但不幸的是我無法理解它是如何工作的。

Answer 1

我沒有測試此的排序方法，但它是像...

public struct SeasonEpisodeNr: IComparable 
{ 
    public int seasonNr; 
    public int episodeNr; 
    public int CompareTo(Object Item) 
    { 
     SeasonEpisodeNr that = (SeasonEpisodeNr) Item; 

     if (this.seasonNr > that.seasonNr) 
      return -1; 
     if (this.seasonNr < that.seasonNr) 
      return 1; 

     if (this.episodeNr > that.episodeNr) 
      return -1; 
     if (this.episodeNr < that.episodeNr) 
      return 1; 

     return 0; 
    } 

Answer 2

退房的例子在這個環節 http://msdn.microsoft.com/en-us/library/8ehhxeaf.aspx

的基本思路是

• 創建一個返回-1（小於），0（等於）一個IComparer實現或1（大於）根據您的自定義比較標準。
• 下一頁通過這個類的一個實例到列表（）

Another (a bit long-drawn) example說明這一

Answer 3

public struct SeasonEpisodeNr 
{ 
    public SeasonEpisodeNr(int seasonNr, int episodeNr) 
    { 
     this.seasonNr = seasonNr; 
     this.episodeNr = episodeNr; 
    } 

    public int seasonNr; public int episodeNr; 
} 

static void Main(string[] args) 
{ 
    List<SeasonEpisodeNr> list = new List<SeasonEpisodeNr>(); 
    list.Add(new SeasonEpisodeNr(1, 2)); 
    list.Add(new SeasonEpisodeNr(1, 1)); 
    list.Sort((a, b) => 
    { 
     //implement comparison, e.g. compare season first and if equal compare the epizods 
     int res = a.seasonNr.CompareTo(b.seasonNr); 
     return res != 0 ? res : a.episodeNr.CompareTo(b.episodeNr); 
    }); 
}