问题描述
当我收到与线程上下文相关的异常时，我使用委托函数并调用该委托函数.需要使用来自其他线程的控制.但我刚刚了解到我可以使用 SynchronizationContext.Post() 函数，我可以在这个方法中调用我的委托.
When I received an exception that is related with thread context, I use delegate function and I invoke this delegate function. It is necessary for use control from an other thread. But I've just learned that I can use SynchronizationContext.Post() function and I can call my delegate in this method.
我不确定哪个更好?这些方法有什么区别?
I'm not sure which one is better? What are differences between these methods?
推荐答案
是同一个东西，SynchronizationContext.Post()调用BeginInvoke()，Send()调用Invoke().
It is the same thing, SynchronizationContext.Post() calls BeginInvoke() and Send() calls Invoke().
SynchronizationContext 的关键属性是它的实现不止一种.重要的是 WindowsFormsSynchronizationContext，它使用 Control.Begin/Invoke 和 DispatcherSynchronizationContext，它使用 Dispatcher.Begin/Invoke.还有其他适用于 ASP.NET、Windows 应用商店(又名 WinRT，又名通用)应用、COM+ 托管的进程外服务器等.
The key property of SynchronizationContext is that there is more than one implementation of it. Important ones are WindowsFormsSynchronizationContext, it uses Control.Begin/Invoke and DispatcherSynchronizationContext, it uses Dispatcher.Begin/Invoke. There are others for ASP.NET, Windows Store (aka WinRT, aka Universal) apps, out-of-process servers that are COM+ hosted, etcetera.
额外的间接级别有助于避免依赖于调用的特定方法.当然对于任何类库都很重要.
The extra level of indirection helps avoid taking a dependency on the specific method that invokes. Important for any class library of course.
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