Question

I’m assuming this is possible in the applicationhost.config file but I did not see a parent paths setting.

How do you allow parent paths for a specific site running under IIS Express?

Answer 1

Browse to C:\Documents and Settings\$your user name$\My Documents\IISExpress\config

Open applicationHost.config

Find the <system.webServer> section

Change the <asp> section to the following…
By default it only had the cache and empty limits bits but feel free to adjust any parameters you don’t want.

<asp 
     enableParentPaths="true" 
     bufferingOn="true" 
     errorsToNTLog="true" 
     appAllowDebugging="true" 
     appAllowClientDebug="true" 
     scriptErrorSentToBrowser="true">

     <session allowSessionState="true" />
     <cache diskTemplateCacheDirectory="%TEMP%\iisexpress\ASP Compiled Templates" />
     <limits />
</asp>

Save and restart iis express.