加入实体框架

本文介绍了加入实体框架的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

你好，

这是我的正常加入查询

  SELECT  Folders.FolderName，FileMaster.FileName  FROM  FileMaster  INNER   JOIN 文件夹 ON  FileMaster.FolderId = Folders.Id  AND  FileMaster .UploadedBy = Folders.UserId

如何写实体框架工作像： -

  var  query = 来自 f   db.Folders 
  join  fm  in  db.FileMasters on f.Id equals fm.FolderId 
 其中 fm.UploadedBy == SessionManager.UserId 
 选择 f;

解决方案

  var  query =  from  f  in  db.Folders 
  join  fm  in  db.FileMasters 
  new  {f.Id，f.UserId} 
等于 new  {fm .FolderId，fm.UploadedBy} 
 选择 f.FolderName +  ; + fm.Filename;

JAFC

Hello,

This is my Normal Join Query

SELECT Folders.FolderName, FileMaster.FileName FROM FileMaster INNER JOIN Folders ON FileMaster.FolderId = Folders.Id AND FileMaster.UploadedBy = Folders.UserId

How to write in entity Frame work Like:-

var query = from f in db.Folders
join fm in db.FileMasters on f.Id equals fm.FolderId
where fm.UploadedBy == SessionManager.UserId
select f;

解决方案

var query = from f in db.Folders
            join fm in db.FileMasters
            on new { f.Id, f.UserId }
            equals new { fm.FolderId, fm.UploadedBy }
            select f.FolderName + ";" + fm.Filename;

JAFC

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