Hello
Duy,
Considering the current session time out you can use a timer, so that on a regular basis, a modal RadWindow will popup with a button which let you perform a callback/an ajax request that in turn will reset the session. The following resources may be helpful in achieving this scenario:
- Window - Modal Popup - How to configure a modal RadWindow
-
Window - Return Values from a Dialog - Shows how to make a communication between RadWindows.
- Window - Confirm Dialog Integration - Illustrates how to perform a postback from a RadWindow.
You may also find useful
Notification - Session Timeout notification online demo that illustrates how to show a notification with RadNotification control to inform the user that his session is about to expire and to let him continue it if he wants.
Regards,
Danail Vasilev
Telerik
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