錯誤LINQ表達式包含與不同的上下文

Question

我得到一個錯誤而執行下面的查詢相關的查詢引用

錯誤： 指定的LINQ表達式包含對與不同上下文關聯的查詢引用

查詢：

var wordlePuzzle = (from wp in wordlepostitionRepository.All 
join wtc in wordletextclueRepository.All on wp.WordleTexCluetId equals wtc.WordleTextClueId 
join w in wordleRepository.All on wtc.WordleId equals w.WordleId 
where wtc.WordleId == id 
select new WordlePuzzle 
{ 
    Row = w.WordleRow, 
    Column = w.WordleColumn, 
    Title = w.WordleTitle, 
    DifficultyLevel = DifficultyLevel.Easy, 
    Duration = w.WordleDuration, 
    ExpiresOn = w.ExpireDate 
}); 

我曾嘗試與查詢結束後追加.AsEnumerable();但它畢竟是給了一個錯誤。

我對所有這些表只是一個數據庫。

Answer 1

看一看實現工作模式的單元，這樣就可以跨庫共享一個上下文實例。

有在網絡上，例如在許多實施例http://www.asp.net/mvc/tutorials/getting-started-with-ef-using-mvc/implementing-the-repository-and-unit-of-work-patterns-in-an-asp-net-mvc-application