如何获得完整的主机名+端口号Global.aspx中的Application_Start？ [英] How to get full host name + port number in Application_Start of Global.aspx?

问题描述

我试过

Uri uri = HttpContext.Current.Request.Url;
String host = uri.Scheme + Uri.SchemeDelimiter + uri.Host + ":" + uri.Port;

和它的工作以及我的本地机器上，但是当被发布到IIS7，有异常说法

and it worked well on my local machine, but when being published to IIS7, there is an exception saying

System.Web.HttpException: Request is not available in this context

任何人都知道如何实现这一目标？

Anyone know how to achieve this?

推荐答案

在你的web应用程序启动时，没有被处理没有HTTP请求。​​

When your web application starts, there is no HTTP request being handled.

您可能要处理定义的Application_BeginRequest（对象发件人，EventArgs五）方法，其中请求上下文是可用的。

You may want to handle define the Application_BeginRequest(Object Sender, EventArgs e) method in which the the Request context is available.

编辑：这是由迈克沃洛达尔斯基的博客的启发code样品迈克尔Shimmins链接到：

Here is a code sample inspired by the Mike Volodarsky's blog that Michael Shimmins linked to:

    void Application_BeginRequest(Object source, EventArgs e)
    {
        HttpApplication app = (HttpApplication)source;
        var host = FirstRequestInitialisation.Initialise(app.Context);
    }

    static class FirstRequestInitialisation
    {
        private static string host = null;
        private static Object s_lock = new Object();

        // Initialise only on the first request
        public static string Initialise(HttpContext context)
        {
            if (string.IsNullOrEmpty(host))
            {
                lock (s_lock)
                {
                    if (string.IsNullOrEmpty(host))
                    {
                        var uri = context.Request.Url;
                        host = uri.GetLeftPart(UriPartial.Authority);
                    }
                }
            }

            return host;
        }
    }

这篇关于如何获得完整的主机名+端口号Global.aspx中的Application_Start？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！