自定义排序（三个字段上的IComparer） [英] Custom Sorting (IComparer on three fields)

问题描述

我有一个包含三个字段的人类，分别是标题，名称，性别，我想为其创建一个自定义排序，以便先按标题，名称再按性别升序对它进行排序：

I have a person class with three fields, Title, Name, Gender and I would like to create a Custom Sort for it to sort it first by Title, then by Name and then by Gender ascending:

public class SortPerson : IComparer
    {
        public int Compare(object x, object y)
        {
            (…)
        }
    }

我知道该怎么做只有一个要比较的变量：
但是我将如何继续进行三个操作？

I know how to do this for only one variable to compare against: But How would I have to proceed with three?

public class SortPerson : IComparer
        {

int IComparer.Compare(object a, object b)
   {
      Person p1=(Person)a;
      Person p2=(Person)b;
      if (p1.Title > p2.Title)
         return 1;
      if (p1.Title < p2.Title)
         return -1;
      else
         return 0;
   }
}

非常感谢，

推荐答案

//Assuming all the fields implement IComparable
int result = a.field1.CompareTo(b.field1);
if (result == 0)
  result = a.field2.CompareTo(b.field2);
if (result == 0)
  result = a.field3.CompareTo(b.field3);
return result;

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