如何保证长时间的操作完成(How to guarantee a long operation completes)

 通常情况下，账单应该在预定日期在后台执行（我还没有想出如何做到这一点，但这是另一个话题）。 
 
 但偶尔，用户可能希望手动执行计费。 一旦点击，我想确保操作运行完成，无论用户端发生什么（例如关闭浏览器，机器死机，网络停机，等等）。 
 
 我很确定db.SaveChanges（）在事务中包装它的数据库操作，所以从服务器的角度来看，我相信整个事情要么完成要么失败，没有部分影响。 
 
 但是POST和db.SaveChanges（）之间的所有工作呢？ 有没有办法确保用户不会无意或有意阻止完成？ 
 
 我想这个问题的必然结果是，如果用户断开连接，正在运行的异步控制器或正在运行的Task或Thread会发生什么？ 

Normally, billings should execute in the background on a scheduled date (I haven't figured out how to do that yet, but that's another topic).
 
But occasionally, the user may wish to execute a billing manually. Once clicked, I would like to be sure the operation runs to completion regardless of what happens on the user side (e.g. closes browser, machine dies, network goes down, whatever).
 
I'm pretty sure db.SaveChanges() wraps its DB operations in a transaction, so from a server perspective I believe the whole thing will either finish or fail, with no partial effect.
 
But what about all the work between the POST and the db.SaveChanges()? Is there a way to be sure the user can't inadvertently or intentionally stop that from completing?
 
I guess a corollary to this question is what happens to a running Asynchronous Controller or a running Task or Thread if the user disconnects?

原文：https://stackoverflow.com/questions/15007432