Increase life time for Asp.net authentication cookie

Question

I used this following code to set authenticate cookie :

System.Web.Security.FormsAuthentication.SetAuthCookie(Profile.Email, true);

my question is how I can increase life-time for this authentication cookie ?

Answer 1

The timeout is set primarily in the web.config file, you can do it in code but I wouldn't advise it.

These are the default settings, you can see the timeout value that's specified in minutes.

<system.web>
  <authentication mode="Forms">
    <forms loginUrl="Login.aspx"
           protection="All"
           timeout="30"
           name=".ASPXAUTH" 
           path="/"
           requireSSL="false"
           slidingExpiration="true"
           defaultUrl="default.aspx"
           cookieless="UseDeviceProfile"
           enableCrossAppRedirects="false" />
  </authentication>
</system.web>

Answer 2

This is how to set that time up. (For instance, for two weeks expiration).

var cookie = FormsAuthentication.GetAuthCookie("user-name", false);
cookie.Expires = DateTime.UtcNow.AddDays(14);
Response.Cookies.Add(cookie);