c# - 通过 LINQ 排序列表数据

Question

我正在尝试通过这种方式订购数据

        List<SearchResult> list = new List<SearchResult>() {
        new SearchResult(){ID=1,Title="Geo Prism 1995 GEO GEO- ABS #16213899"},
        new SearchResult(){ID=2,Title="Geo Prism 1995 GEO - ABS #16213899"},
        new SearchResult(){ID=3,Title="Geo Prism 1995 - ABS #16213899"},
        new SearchResult(){ID=3,Title="Geo Prism 1995 - ABS #16213899"},
        new SearchResult(){ID=4,Title="Wie man BBA reman erreicht"},
        new SearchResult(){ID=5,Title="Ersatz Airbags, Gurtstrammer und Auto Körper Teile "},
        new SearchResult(){ID=6,Title="JCB Excavator - ECU P/N: 728/35700"},
        };

        var to_search = new[] { "Geo", "JCB" };
        var result = from searchResult in list
                     let title = searchResult.Title.ToLower()
                     let key_string = to_search.FirstOrDefault(ts => title.Contains(ts))
                     orderby key_string == null ? -1 : title.Split(new[] { key_string }, StringSplitOptions.None).Length descending
                     group searchResult by key_string into Group
                     orderby Group.Count() descending
                     select Group;

        var matched = result.SelectMany(m => m);
        var completeList = matched.Concat(list.Except(matched));
        dataGridView2.DataSource = completeList.ToList();//.SelectMany(x => x).ToList();

数据显示在网格中，但我期望数据不会出现。

输出即将到来

ID  Title

---

1   Geo Prism 1995 - ABS #16213899
2   Geo Prism 1995 - ABS #16213899
3   Geo Prism 1995 - ABS #16213899
3   Geo Prism 1995 - ABS #16213899
4   Wie man BBA reman erreicht
5   Ersatz Airbags, Gurtstrammer und Auto Körper Teile 
6   JCB Excavator - ECU P/N: 728/35700

但我想以这种方式显示数据

输出应该是这样的

ID  Title

---

1   Geo Prism 1995 GEO GEO - ABS #16213899
2   Geo Prism 1995 GEO - ABS #16213899
3   Geo Prism 1995 - ABS #16213899
3   Geo Prism 1995 - ABS #16213899
6   JCB Excavator - ECU P/N: 728/35700
4   Wie man BBA reman erreicht
5   Ersatz Airbags, Gurtstrammer und Auto Körper Teile 

JCB 应该排在所有 GEO 之后，因为我正在使用搜索词对数据进行排序，例如“geo jcb” .在大多数行的标题中找到 geo。所以那些出现我的搜索词的行排在第一位。所以 geo 是我的搜索词之一，它在所有行标题中显示最长时间。下一个 jcb 应该出现，因为 jcb 在我的搜索词中，但在最后出现的输出 jcb 相关行中。所以告诉我如何更改我的 linq 查询。谢谢

Answer 1

class SearchResult{
    public int ID { get; set; } 
    public string Title{ get; set; }
}

void Main()
{

    List<SearchResult> list = new List<SearchResult>() {
        new SearchResult(){ID=4,Title="Wie man BBA reman erreicht"},
        new SearchResult(){ID=5,Title="Ersatz Airbags, Gurtstrammer und Auto Körper Teile "},
        new SearchResult(){ID=6,Title="JCB Excavator - ECU P/N: 728/35700"},
        new SearchResult(){ID=2,Title="Geo Prism 1995 GEO - ABS #16213899"},
        new SearchResult(){ID=3,Title="Geo Prism 1995 - ABS #16213899"},
        new SearchResult(){ID=1,Title="Geo Prism 1995 GEO GEO- ABS #16213899"},
    };

    var to_search = new[] { "Geo", "JCB" };

    var result = from sr in list
                 let w = to_search.FirstOrDefault(ts => sr.Title.ToLower().Contains(ts.ToLower()))
                 where w != null
                 let a = new {sr=sr, word=w.ToLower()}
                 group a by a.word into g
                 orderby g.Count() descending
                 let sorted = g.OrderByDescending(a=> a.sr.Title.Select((c, i) => a.sr.Title.Substring(i)).Count(sub => sub.ToLower().StartsWith(a.word)))
                 from a in sorted 
                 select a.sr;

    var completeList = result.Concat(list.Except(result));

    foreach (var element in completeList)
        Debug.WriteLine(String.Format("ID={0},Title={1}", element.ID, element.Title));
}

---

输出:

ID=1,Title=Geo Prism 1995 GEO GEO- ABS #16213899
ID=2,Title=Geo Prism 1995 GEO - ABS #16213899
ID=3,Title=Geo Prism 1995 - ABS #16213899
ID=6,Title=JCB Excavator - ECU P/N: 728/35700
ID=4,Title=Wie man BBA reman erreicht
ID=5,Title=Ersatz Airbags, Gurtstrammer und Auto Körper Teile