I learned how to arise an alert box RadAjaxManager1.Alert() but now i need to prompt the user if he wants to takes a further action?
If yes then do something if no do something else.
You can use the radconfirm for prompting user to perform any action and radconfirm is standard confirm works on the client. Therefore,
to perform any actions on the server side after you select Yes/No, you
need to make a postback to the server. Checkout the following forum link which discusses how to pass the radconfrm result to server side by performing postback. radconfirm
[Note: As an alternative you can also perform an ajax request instead of using
__doPostBack javaScript built-in function (which is mentioned in the above forum). You can do this by using the RadAjaxManager control and its ajaxRequest function]