等待UDPClient.ReceiveAsync与超时 [英] await UDPClient.ReceiveAsync with timeout

问题描述

我使用UDPClient像下面

I'm using UDPClient like below

dim c = New UDPClient(port)
client.CLient.ReceiveTimeout = 1
await client.ReceiveAsync()

然而，计谋不会终止或抛出，甚至 虽然我已经设置了超时。这是正常的 行为？

However the await does not terminate or throw even though I have set a timeout. Is this normal behaviour?

推荐答案

这是为Socket.ReceiveTimeout MSDN库文章中明确提到：

It is explicitly mentioned in the MSDN Library article for Socket.ReceiveTimeout:

获取或设置一个值，指定的时间量之后，一个同步接收通话将超时。

Gets or sets a value that specifies the amount of time after which a synchronous Receive call will time out.

着重强调。你是做一个同步的接收相反，当您使用ReceiveAsync（）。解决方法是使用您在通话开始前和结束后一个System.Timers.Timer的。关闭插座经过的事件处理程序，以便在ReceiveAsync（）方法终止与ObjectDisposed例外。

Emphasis added. You are doing the opposite of a synchronous receive when you use ReceiveAsync(). The workaround is to use a System.Timers.Timer that you start before the call and stop afterwards. Close the socket in the Elapsed event handler so the ReceiveAsync() method terminates with an ObjectDisposed exception.

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