Question

我有一个List<string>这样的人

List<string> Test_List = new List<string>()
{
    "ZZA-KG-TEST",
    "ZZA-EG-TEST",
    "ZZA-KL-10A",
    "ZZA-KL-5A",
    "ZZA-KL-1A",
    "ZZA-FG-TEST",
    "RO-ELEVER"
};

排序后

预期的输出

List<string> Test_List = new List<string>()
{
    "ZZA-KL-1A",
    "ZZA-KL-5A",
    "ZZA-KL-10A",
    "ZZA-KG-TEST",
    "ZZA-FG-TEST",
    "ZZA-EG-TEST",
    "RO-ELEVER"
};

我实际上所得到的是

List<string> Test_List = new List<string>()
{
    "ZZA-KL-1A",
    "ZZA-KL-5A",
    "ZZA-KL-10A",
    "RO-ELEVER"
    "ZZA-EG-TEST",
    "ZZA-FG-TEST",
    "ZZA-KG-TEST",
};

我的代码是这个

var data = Test_List
    .OrderByDescending(i => i.Contains("-KL-"))
    .ThenBy(i => i, new AlphanumericComparer())
    .ThenByDescending(i => i.Contains("-KG-"))
    .ThenBy(i => i, new AlphanumericComparer())
    .ThenByDescending(i => i.Contains("-FG-"))
    .ThenBy(i => i, new AlphanumericComparer())
    .ThenByDescending(i => i.Contains("-EG-"))
    .ThenBy(i => i, new AlphanumericComparer());

class AlphanumericComparer : IComparer<string>
{
    [DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
    static extern int StrCmpLogicalW(string s1, string s2);

    public int Compare(string x, string y) => StrCmpLogicalW(x, y);
}

有什么想法吗？

编辑，我需要所有包含-KL-的项目都位于 top 处，然后使用-KL-和-KG-对其进行排序， -FG-和-EG-，然后其余的

Answer 1

您可能想要首先订购组（按此顺序{KL, KG, FG, EG, all_the_rest）：

.OrderByDescending(i => i.Contains("-KL-"))
.ThenByDescending(i => i.Contains("-KG-"))
.ThenByDescending(i => i.Contains("-FG-"))
.ThenByDescending(i => i.Contains("-EG-"))

然后才在每个组中订购项目：

.ThenBy(i => i, new AlphanumericComparer());

即

var data = Test_List
  .OrderByDescending(i => i.Contains("-KL-"))
  .ThenByDescending(i => i.Contains("-KG-"))
  .ThenByDescending(i => i.Contains("-FG-"))
  .ThenByDescending(i => i.Contains("-EG-"))
  .ThenBy(i => i, new AlphanumericComparer());

通过检查列表项是否包含

1 个答案: