确定不使用HttpContext.Current的URL主机名？ [英] Determine the URL hostname without using HttpContext.Current?

问题描述

使用当前请求我可以获取URL主机名：

Using the current request I can get the URL hostname with:

HttpContext.Current.Request.Url.Host

可是 - 我需要确定URL主机名不使用当前请求（ HttpContext.Current ）。这样做的原因是，我的code从的SqlDependency 为onChange回调调用时找到一个SQL的依赖性。 Althougth的code所在我的Web应用程序，也没有要求，而 HttpContext.Current 为null。

But - I need to determine the URL hostname without using the current request (HttpContext.Current). The reason for this is that my code is called from a SqlDependency in the onChange callback for when a SQL Dependency is found. Althougth the code resides in my web app, there is no request, and HttpContext.Current is null.

我希望我可以从的httpRuntime 抓住它，但似乎并没有被使用岂有。有没有一种方法可以让我得到这个信息？

I was hoping I could grab it from HttpRuntime, but there doesn't seem to be anything of use there. is there a way I can get this information?

推荐答案

如果你知道你设置了事件处理的那一刻主机，那么你应该能够做到像（code没有实际测试）：

If you know the host at the moment you're setting up the event handler then you should be able to do something like (code not actually tested):

string host = HttpContext.Current.Request.Url.Host;
var dep = new SqlDependency(cmd);
dep.OnChange += ((sender, args) =>
{
    DoStuff(host);
});

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