Linq加入和順序

Question

我有一個表中的文件和另一個文件中的文件操作。我想，傑夫已採取行動，對具有4.在SQL狀態最近的文件，看起來像這樣：

SELECT TOP 1 files.* 
FROM files 
LEFT OUTER JOIN fileActions ON files.FileId = fileActions.FileId 
WHERE fileActions.ActionTaker = 'Jeff' 
    AND files.FileStatus = 4 
ORDER BY fileActions.ActionDate DESC 

我將如何表達的Linq該查詢？

我已經嘗試了很多東西，但我甚至無法編譯它。我覺得這是我來迄今最接近，但很明顯「頂」是不是一個LINQ語法詞，所以我有一個很好的路要走：

var file = from f in context.Files 
      join fa in context.FileActions on f.FileId equals fa.FileId 
      where fa.ActionTaker == "Jeff" 
      where f.FileStatus == 4 
      orderby fa.ActionDate descending 
      select top 1 f; 

任何幫助表示讚賞。

Answer 1

試試這個：

var file = (from f in context.Files 
      join fa in context.FileActions on f.FileId equals fa.FileId 
      where fa.ActionTaker == "Jeff" && f.FileStatus == 4 
      orderby fa.ActionDate descending 
      select f).FirstOrDefault(); 

Answer 2

試試這個

var file = (from f in context.Files 
      join fa in context.FileActions on f.FileId equals fa.FileId 
      where fa.ActionTaker == "Jeff" 
      && f.FileStatus == 4 
      orderby fa.ActionDate descending 
      select f).first(); 

Answer 3

如果我明白你的問題......

var file = (from f in context.Files 
      join fa in context.FileActions on f.FileId equals fa.FileId 
      where fa.ActionTaker == "Jeff" && f.FileStatus == 4 
      orderby fa.ActionDate descending 
      select new { Value1 = fa.Id, Value2 = f.Id }).FirstOrDefault();