是 - Otavio是正确的，没有页面事件ASMX Web服务，因为他们没有从页面派生

Yes - Otavio is correct, there is no Page events for ASMX Web Services, as they do not derive from Page.

不过，请求遵循常规 ASP.NET处理管道。

有在有关的IHttpHandler被执行的处理的一个点。这可以是一个页面，一个通用的HTTP处理程序，或web服务。

There is a point in the process where the relevant IHttpHandler is executed. This can be a page, a generic HTTP handler, or a web service.

这就是Web服务请求的执行情况。

This is where the web service request execution happens.

所以，这真的取决于你想在这里做什么。该构造函数应该提供一个良好的钩到pre-请求执行。如果你正在寻找的东西甚至更早，那么你可能需要挂接到一个Global.asax中的事件。

So, it really depends on what you're trying to do here. The ctor should provide a good hook-in to pre-request execution. If you're looking for something even earlier, then you will likely need to hook into a Global.asax event.