IComparer没有被调用

Question

我有一个问题，我的自定义IComparer没有被调用。我想也许它可能与我有关，期望它能与不同的对象一起工作？为什么没有被召唤？

Icomparer：

public class MyComparer : IComparer<object>
{
    public string[] needles { get; set; }

    public MyComparer(string[] argument)
    {
        needles = argument;
    }

    public int Compare(object x, object y)
    {
        int rankA = x.getRankedResults(needles);
        int rankB = y.getRankedResults(needles);

        if (rankA > rankB) { return 1; }
        else if (rankA < rankB) { return -1; }
        else { return 0; }
    }

}

public static class MyComparerExtensions
{
    public static int getRankedResults(this object o, string[] needle)
    {
        int result = 0;

        if (o.GetType() == typeof(StaticPage))
        {
            var orig = o as StaticPage;
            result = needle.countOccurences(orig.PageTitle.StripHTML(), orig.BodyCopy.StripHTML());
        }
        else if (o.GetType() == typeof(CustomerNewsArticle))
        {
            var orig = o as CustomerNewsArticle;
            result = needle.countOccurences(orig.Title.StripHTML(), orig.BodyCopy.StripHTML());

        }
        else if (o.GetType() == typeof(Blog))
        {
            var orig = o as Blog;
            result = needle.countOccurences(orig.Title.StripHTML(), orig.Body.StripHTML());
        }
        else if (o.GetType() == typeof(PressRelease))
        {
            var orig = o as PressRelease;
            result = needle.countOccurences(orig.title.StripHTML(), orig.body.StripHTML());
        }

        return result;
    }

    //count the total occurences of the needles inside the haystack
    private static int countOccurences(this string[] needle, params string[] haystack)
    {
        int occurences = 0;

        foreach (var n in needle)
        {
            foreach (var h in haystack)
            {
                var nh = h;
                int lenghtDif = nh.Length - nh.Replace(n, "").Length;
                occurences = occurences + (lenghtDif / n.Length);
            }
        }

        return occurences;
    }

}

以及如何调用它：

string[] needles = new string[] { "one", "two", "three" };
Haystacks.OrderBy(o=> o, new MyComparer(needles));

所以＆＃34;干草堆＆＃34;有42个不同类型的对象（它们是来自不同表的行，内部＆＃34; getRankedResults＆＃34;我检测对象的类型并选择用于计算等级值的字段）。当我在排序上调用MyComparer时，我可以看到在构造函数中设置的参数，然后＆＃34;比较（对象x，对象y）＆＃34;永远不会被召唤。