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I'm using the following setup to load SSRS reports with the <rsweb:ReportViewer> control in an ASP.NET web application:
<rsweb:ReportViewer
id="RptViewer"
runat="server"
width="100%"
skinid="rv"
ProcessingMode="Remote"
ZoomMode="FullPage">
</rsweb:ReportViewer>
My web.config session settings are configured like this:
<system.web>
<sessionState cookieless="UseCookies" mode="InProc" timeout="20" cookieSameSite="None" />
</system.web>
We're using .NET Framework 4.8 on a server in a web farm setup. When loading the ReportViewer via an iframe, we're encountering ASP.NET session timeout errors.
Could this issue be related to the ReportViewer's support for iframes? Do we need a custom HTTP handler to maintain the session across the iframe?
If anyone has faced a similar issue, your guidance would be greatly appreciated.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(262.40000000000003, 36%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELH%3C/text%3E%3C/svg%3E)
Hi @Shende1, Pankaj,
May I know if you have got any chance to check my reply? Please feel free to share more detailed information to us and it will be very helpful for us to better work out this issue.
We're using .NET Framework 4.8 on a server in a web farm setup.
Does your server provide sticky session? Please note that the ReportViewer uses the ASP.NET Session. Since your Session is InProc, web farm will have to provide sticky session.
Thank you for answer, We've implemented sticky sessions but still face intermittent session timeouts. Can you suggest solutions involving cookie settings or other configurations? If you've solved a similar issue, please share your successful ASP.NET session management setup in config.
Session data of InProc mode is lost by recycle of worker process in IIS. Do you have any idea about it?
Session data is lost when you use ASP.NET InProc session state mode
deleted because duplicated
Hi @Shende1, Pankaj,
If you're only having this issue in an iframe, you could try putting this in your web.config.
<sessionState cookieSameSite="None" />
<httpCookies requireSSL="true"/>
Best regards,
Lan Huang
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