问题
I have an aspx page with a listbox control. The listbox is populated from a collection that is retrieved from a service when the page loads. When the user selects an item from the listbox the page posts back, adding the retrieved objects to the session before reloading. On the reload I use the session objects instead of having to call the service again.
This all works fine until I access the page from within an iFrame. The Session objects are not retrieved when the page is in an iFrame (Session["blah"] is null). This code works perfectly when the page is not in an iFrame.
I am using IIS7 and windows server 2008. Is there anything I need to do in ISS to allow Session variables to be used in an iFrame? Does anyone know of anything else that may cause this to happen?
Thanks, Neil
回答1:
IE gives lower level of trust to 3rd party content loaded in an iframe. This blocks session cookies.
You can solve this by setting a P3P header in IIS:
Name = p3p
Value = CP="IDC DSP COR CURa ADMa OUR IND PHY ONL COM STA"
See Also
- Cookie blocked/not saved in IFRAME in Internet Explorer
- Compact P3P settings with IIS7
回答2:
Actually never mind, I just cleared out the files in C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files and restarted IIS and it was all working
回答3:
To enable sessions in iFrames: InterNet Options -> Privacy -> Advanced -> Check "Always Allows Session Cookies"
来源：https://stackoverflow.com/questions/6368750/session-variables-not-saved-when-page-is-in-an-iframe