当新DLL复制到BIN目录时,ASP.net C#需要重新启动IIS

当您将app_offline.htm文件放在主域的wwwroot中时,IIS站点将脱机.这是Scott Gu描述的IIS的默认行为.执行此操作时,可以安全地覆盖所有dll.当您删除app_offline.htm文件时,您的应用程序将在下次请求时启动.

了解有关app_offline.htm here和here的更多信息.

Basically,if you place a file with this name in the root of a web application directory,ASP.NET 2.0 will shut-down the application,unload the application domain from the server,and stop processing any new incoming requests for that application. ASP.NET will also then respond to all requests for dynamic pages in the application by sending back the content of the app_offline.htm file (for example: you might want to have a “site under construction” or “down for maintenance” message).

This provides a convenient way to take down your application while you are making big changes or copying in lots of new page functionality (and you want to avoid the annoying problem of people hitting and activating your site in the middle of a content update). It can also be a useful way to immediately unlock and unload a SQL Express or Access database whose .mdf or .mdb data files are residing in the /app_data directory.

Once you remove the app_offline.htm file,the next request into the application will cause ASP.NET to load the application and app-domain again,and life will continue along as normal.