Auto redirect to login after session timeout
Solution 1
AppendHeader
is documented as causing an exception if "header is appended after the HTTP headers have been sent" You need to make sure AppendHeader is called before the HTTP headers have been sent. Depending on your master page, the Load
event might be too late. You could try the Init
event instead.
Solution 2
I think you need to use Refresh
instead of `Redirect' in your header:
Response.AppendHeader("Refresh",
Convert.ToString((Session.Timeout * 60) - 3) +
";URL=~/Login.aspx");
Solution 3
Here is an example I have that works for me:
<authentication mode="Forms">
<forms loginUrl="~/Login/Index" defaultUrl="~/Admin" timeout="20">
</forms>
</authentication>
If you have this, there is no need for you to check the timeout cookie yourself. This is assuming you are using Forms Authentication.
Inbal
Updated on October 02, 2020Comments
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Inbal over 3 years
I am trying to redirect automatically to my login page after session times out. I tried to add this code in my Main.Master page (all the other pages are connected to this master page):
protected void Page_Load(object sender, EventArgs e) { //Redirects to Login Page 3 seconds before session timeout Response.AppendHeader("Redirect", Convert.ToString((Session.Timeout * 60) - 3) + "; URL=~/Login.aspx"); }
I configured the session timeout to 1 minute in my web config:
<sessionState mode="InProc" cookieless="false" timeout="1"/>
but nothing happens
Can anyone help me find the problem with this code, or has other ideas how to make it work?
Edit: Authentication node from web.config
<authentication mode="Forms"> <forms name=".CAuthenticated" loginUrl="Login.aspx" protection="All" timeout="20"/> </authentication>
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Inbal almost 12 yearswhen the redirection works, I get Requested URL: /website/Pages/~/Login.aspx Do you know why? and it seems like it takes the content page location and not the app root.
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Peter Ritchie almost 12 years~/Login.aspx is just text, if you want to translate that into a relative url use something like VirtualPathUtility.MakeRelative
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Inbal almost 12 yearsThank you very very very much :)