How do I prevent to page expiry in ASP.NET

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i am using asp.net and sql server for my web application.
my files are published in a shared windows hosting server,the default session length overridden by web hosting service 5 mins.
for that i decide to use cookie instead of session.

now the problem is...if i use a page after 3 mins its going to the custom error page named "sessionexpire.html".....i can not understand the problem...actually what is going on...please help me....

What I have tried:

C#

private void CheckCookie()
{
HttpCookie CookieName = Request.Cookies["MyCookie"];
CookieName.Expires = DateTime.Now.AddMinutes(30);
if (CookieName != null)
{
Uid = Request.Cookies["MyCookie"]["UserId"];
UTyp = Request.Cookies["MyCookie"]["UserType"];
UName = Request.Cookies["MyCookie"]["name"];
ArrangerId = Request.Cookies["MyCookie"]["ArrangerId"];
}
}

C#

protected void Page_Load(object sender, EventArgs e)
{
try
{
CheckCookie();
}
catch (Exception ex)
{
string s = ex.Message;
Response.Redirect("logout");
}
}

and in web config i have written

sessionState mode="InProc" timeout="30"
compilation debug="true" and targetFramework="4.0"
customErrors mode="On"
defaultRedirect="sessionexpire.html"
authentication mode="Forms"
and forms timeout="30"

Posted 18-Mar-16 23:03pm

BIBASWAN

Updated 18-Mar-16 23:31pm

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OriginalGriff · Answer 1 · 2016-03-18T23:31:00

Check your times: remember that the cookie is client based, so any expiration time will be relative to the local time on the client, while you are setting the expiration time relative to the local time on the server. If they are different by a couple of minutes that could cause the expiry. Or as is more likely, the server is in a different timezone completely, and the expiry time you select has already passed for the client!

So start by looking at the cookie - use Chrome and you can inspect cookies quite easily in "Settings" and the other browsers should be fairly simple as well - or write the expiry time to your page when you set the cookie and look at it in the browser window for a manual comparison.

And if your hosting service is overriding the default session timeout, then don't add override code to your configuration - it give the misleading impression of the session length which will probably come back to bite you later when you have forgotten why it doesn't actually work... :laugh: