A common scenario is to display new text in the RadNotification at some point. To do so, you can use a client callback, a WebService or change the Text server property.
Changing a server property, however, requires a full postback or to update the whole notification with AJAX.
To display a quick new message once, a Show(string) server method is provided and it does not require that the notification control is a part of the (partial) page rendering. The string can contain HTML.
In this manner you can easily show the notification from the server with any string without caring for AJAX settings or implementing a more complex load on demand mechanism such as callback or WebService.
In this demo, there are three buttons that are placed inside three UpdatePanels. There are also three RadNotifications - one for each button.
When a button is clicked it changes the initial text of its respective notification by including the current time. Depending on the manner of this change, it will either be seen immediately (the second and third buttons), or only after a postback (the first button).
The third button does not change a server property and, therefore, the new text is not persisted after a postback. You can monitor how these changes are carried out via the fourth button that initiates a full page postback.