排序ArrayList中包括自定义结构

Question

我写了一个struct

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

在我的计划，我将这些结构添加到一个ArrayList。我如何分类？我试过IComparer，但不幸的是我无法理解它是如何工作的。

Answer 1

我没有测试此的排序方法，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

退房的例子在这个环节 http://msdn.microsoft.com/en-us/library/8ehhxeaf.aspx

的基本思路是

• 创建一个返回-1（小于），0（等于）一个IComparer实现或1（大于）根据您的自定义比较标准。
• 下一页通过这个类的一个实例到列表（）

Another (a bit long-drawn) example说明这一

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); 
    }); 
}