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此委托函数.必须从其他线程进行使用控制.但是我刚刚了解到可以使用 SynchronizationContext.Post()函数，并且可以在此方法中调用我的委托.但是我不确定哪个更好?或这些方法之间有什么区别.
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. But I'm not sure which one is better? or What are difference between these methods.
非常感谢.
推荐答案
是同一回事，SynchronizationContext.Post()调用BeginInvoke()，Send()调用Invoke().
It is the same thing, SynchronizationContext.Post() calls BeginInvoke() and Send() calls Invoke().
SynchronizationContext的关键属性是它有多个实现.重要的是WindowsFormsSynchronizationContext，它使用Control.Begin/Invoke和DispatcherSynchronizationContext，它使用Dispatcher.Begin/Invoke.还有其他一些ASP.NET，Windows Store(又名WinRT，又名Universal)应用程序，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所调用的 specific 方法.对于任何课程类库都很重要.
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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