排序包含自定义结构的ArrayList
本文关键字:ArrayList 结构 自定义 包含 排序 | 更新日期: 2023-09-27 18:00:16
我写了一个结构
public struct SeasonEpisodeNr { public int seasonNr; public int episodeNr; }
在我的程序中,我会将这些结构添加到ArrayList中。我该如何分类?我试过IComparer,但不幸的是,我无法理解它是如何工作的。
我没有测试它,但它有点像。。。
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;
}
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);
});
}
查看此链接中的示例http://msdn.microsoft.com/en-us/library/8ehhxeaf.aspx
基本思想是
- 创建一个IComparer实现,该实现根据自定义比较条件返回-1(小于)、0(等于)或1(大于)
- 接下来,将此类的一个实例传递给List()的Sort方法
另一个(画得有点长)例子说明了这个