ASP.NET 异步控制器并调用 Sync()；什么是“Sync()”？
使用的使用 BeginMethod/EndMethod 模式部分ASP.NET MVC 中的异步控制器 引用 Sync() 方法。它没有链接，我无法通过谷歌搜索找到有关它的文档，因为同步是一个太常见的术语。有人可以指出我的写作方向吗？
为了确保您有权访问 HttpContext.Current 实例和 为了避免竞争条件，你可以 通过调用恢复 HttpContext.Current 回调方法中的 Sync()。
The Working with the BeginMethod/EndMethod Pattern section of Using an Asynchronous Controller in ASP.NET MVC refers to a Sync() method. It is not linked and I am having trouble finding documentation on it through google searches since sync is too common a term. Can someone point me in the write direction?
To make sure that you have access to
the HttpContext.Current instance and
to avoid the race condition, you can
restore HttpContext.Current by calling
Sync() from the callback method.
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当您通过从控制器操作中调用 BeginXyz / EndXyz 方法来生成异步操作时，处理异步响应的线程不受 ASP.NET 的控制。因此，您无法接触 HttpContext、控制器实例或这些线程内的任何其他共享状态。调用 Sync() 方法基本上同步对请求的访问；它恢复 HttpContext.Current 并授予您访问 HttpContext、控制器等的权限，但仅限于 Sync() 调用期间。 MVC Futures 的 RegisterTask() 扩展方法尝试使这变得更容易一些，因为您基本上将其委托传递给目标 Begin 和 End 方法，并且 RegisterTask() 帮助器将确保 End 线程在适当的同步上下文中执行。
如果您通过从控制器操作中调用 XyzAsync / XyzCompleted 方法来生成异步操作，则不必担心这一点，因为已完成的处理程序会在同步上下文中自动运行。
When you spawn asynchronous operations by calling BeginXyz / EndXyz methods from within your controller action, the threads handling the asynchronous response are not under the control of ASP.NET. As such, you can't touch HttpContext, the controller instance, or any other shared state from within those threads. Calling the Sync() method basically synchronizes access to the request; it restores HttpContext.Current and grants you access to touch HttpContext, the controller, etc., but only for the duration of the Sync() call. The RegisterTask() extension method from MVC Futures attempts to make this a bit easier, as you basically pass it delegates to the target Begin and End methods, and the RegisterTask() helper will ensure that the End thread executes within an appropriate synchronization context.
If you're spawning asynchronous operations by calling XyzAsync / XyzCompleted methods from within your controller action, you don't have to worry about this, as the completed handler automatically runs within a synchronization context.
它是
AsyncManager类的一个方法。 http://msdn.microsoft. com/en-us/library/system.web.mvc.async.asyncmanager.sync.aspxIt's a method of the
AsyncManagerclass. http://msdn.microsoft.com/en-us/library/system.web.mvc.async.asyncmanager.sync.aspx