#) Trick with DataGrid
You can trick the DataGrid's ButtonColumn to use an image for a button
without having to use a TemplateColumn. It's really easy. In the DataGrid
Property Builder, change the column's Button Type to �LinkButton�, then use
regular HTML for the �Text� property, like
<IMG src="" border=0>
Click �Apply�, you now have an image button without the hassle of
having a TemplateColumn. Switch over to the ASPX code view, and you should see
the following:
<asp:ButtonColumn Text="<img
src=""
border="0" />" CommandName="Delete" />
#) Resolving quick time-out issue with Forms
Authentication
When using forms authentication with slidingExpiration set to true
(default), the cookie is updated only when more than half the timeout value has
elapsed. As a result of this, you might be logged off sooner than you think.
Consider this: You have set the timeout to 30 minutes. You logon on at 3:00
pm; a FormsAuthenticationTicket is set to expire at 3:30 pm. The expiration of
this ticket will not be extended for another 30 minutes until you make a request
after 3:15 pm. So, if you made your last request at 3:15 pm, the ticket will
still expire at 3:30 pm as more than half the timeout value has not elapsed
(giving you a 15 minute window before you get logged out).
On the other had, if you had made a request at 3:16 pm, the expiration of
the ticket is extended to 3:46 p.m.
From MSDN:
timeout : Specifies the amount of time, in integer
minutes, after which the cookie expires. The default value is 30. If the
SlidingExpiration attribute is true, the timeout attribute is a sliding value,
expiring at the specified number of minutes after the time the last request was
received. To prevent compromised performance, and to avoid multiple browser
warnings for users that have cookie warnings turned on, the cookie is updated
when more than half the specified time has elapsed. This might result in a loss
of precision. Persistent cookies do not time out.
Regards,
Varad
Systems Analyst
Microsoft Solutions Group
Satyam
Computer Services LTD.,
"We Learn
Together & We Grow Together" | 
