查找LINQ的用户排名

Question

enter image description here 如何通过LINQ获取表中用户的排名？我用VB.NET代码

，如果我们有我们的表这些领域

[ID，姓名，成绩]

为了用户，我们怎么能拿到名次（行号）的分数后一个他们在我们的查询？

Answer 1

谢谢你的男人。我用波纹管的代码，它的工作对我罚款：

 Dim query = (From P In DB.tblUserScores Order By P.Score 
              Descending Select P).AsEnumerable() 

     Dim Rank As Integer = 1 
     For Each userObj As tblUserScore In query 
      If userObj.DeviceId = DeviceID Then Exit For 
      Rank += 1 
     Next 

Answer 2

方法如下：

Dim records = _ 
{ _ 
    New With { Key .ID = 1, Key .Name = "A1", Key .Score = 7 }, _ 
    New With { Key .ID = 2, Key .Name = "A2", Key .Score = 9 }, _ 
    New With { Key .ID = 3, Key .Name = "A3", Key .Score = 2 }, _ 
    New With { Key .ID = 4, Key .Name = "A4", Key .Score = 1 }, _ 
    New With { Key .ID = 5, Key .Name = "A5", Key .Score = 6 }, _ 
    New With { Key .ID = 6, Key .Name = "A6", Key .Score = 4 }, _ 
    New With { Key .ID = 7, Key .Name = "A7", Key .Score = 7 }, _ 
    New With { Key .ID = 8, Key .Name = "A8", Key .Score = 3 }, _ 
    New With { Key .ID = 9, Key .Name = "A9", Key .Score = 5 }, _ 
    New With { Key .ID = 10, Key .Name = "A10", Key .Score = 8 } _ 
} 

Dim query = _ 
    From r In Records _ 
    Order By r.Name Ascending 
    Order By r.Score Descending 
    Select r 

query.Dump() 

Dim rank = _ 
    query _ 
     .Select(Function (x, n) New With { Key .Record = x, Key .Rank = n + 1 }) _ 
     .ToDictionary(Function (x) x.Record.Name, Function (x) x.Rank) 

Dim name = "A9" 
Console.WriteLine("User " & name & "'s Rank is " & rank(name)) 

这给了我：

 
User A9's Rank is 6