ASP.NET web.config 设置

<!--
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services 7.0.  It is not necessary for previous version of IIS.
-->

<system.webServer>

<defaultDocument>
            <files>
                <add value="UserLogin.aspx" />
            </files>
        </defaultDocument>

</system.webServer>

如果这个地方设了值,在IIS里设的就不管用了