根据Review Id下载文件 [英] Downloading a file based on a Review Id
问题描述
我在我的图书馆系统中使用两个表来显示书籍类别及其相关评论（例如，类别'ASP.NET'有评论'开始ASP.NET'）。
现在我需要一个名为Files的第三个表来保存PDF文件。
使用此表我可以上传和下载.pdf文件。它的工作原理如下： http://imar.spaanjaars.com/414/storing-uploaded-files-in-a-database-or-in-the-file-system-with-aspnet-20
我的实体框架数据模型如下所示：
http： //postimg.org/image/iorpggn25/ [ ^ ]
使用文件表，上传的文件保存在VS中名为Uploads的文件夹中（生成的Id-s像这样 58e91f20-7c8f-4878-a7ac -315ab3a5353c.pdf ）原始副本保存在文件系统中。
我是否需要与其他表关联？如果是这样，我需要什么关联以及哪个表加入Files表？在Review表中，所有评论都有Id-s，如： 1,2,15,20 ..等等。
我需要一个每个评论内的下载按钮和每个评论应该下载不同的pdf文件。
如何提供按钮或链接，所以点击时，它指向我到Uploads文件夹，我可以在那里下载那本特定的书。
如果评论有 Id = 5 和pdf文件 Id = 58e91f20-7c8f-4878-a7ac-315ab3a5353c ，如何将此pdf文件加入该评论并下载？
I'm using two tables for my library system to display books categories with their associated reviews (ex. Category 'ASP.NET' have a review 'Beginning ASP.NET').
Now I need a third table called Files which holds the PDF file.
Using this table I can Upload and Download .pdf files. How it works is described here: http://imar.spaanjaars.com/414/storing-uploaded-files-in-a-database-or-in-the-file-system-with-aspnet-20
My Entity Framework Data Model looks like this:
http://postimg.org/image/iorpggn25/[^]
Using Files table, uploaded files are saved on a folder called Uploads in VS (with generated Id-s like this 58e91f20-7c8f-4878-a7ac-315ab3a5353c.pdf) and the original copy is saved in the file system.
Do I need a association with other tables? If so, what association do I need and with which table to join the Files table? In the Review table all reviews have Id-s like: 1,2,15,20..etc,.
I need a 'Download' button inside each review and each review should download a different pdf file.
How can I provide a button or a link, so when click, it points me to the Uploads folder where I can download that specific book.
If a review have an Id=5 and the pdf file Id=58e91f20-7c8f-4878-a7ac-315ab3a5353c, how can I join this pdf file to that review and download it?
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