RadControls for ASP.NET AJAX
In order to use this dialog you need to have a RadWindowManager on the page.
The RadConfirm dialog presents a message and displays "OK" and "Cancel" buttons for the user.
As with the other RadWindow dialogs, the message is not limited to text: you can supply a string of HTML for richer formatting.
Unlike its regular browser counterpart, this version of the confirm dialog is non-blocking, so the rest of the page continues processing
even before the dialog closes. Because the dialog is non-blocking it's designed to respond via a callback.
At a minimum, the RadConfirm function takes two arguments, and HTML string with the message,
and the name of a callback function that deals with the results. The callback takes a single parameter, whose value is True or
False, depending on whether the user clicks "OK" or "Cancel". Additionally you can provide parameters to set the
width, height, title and image URL.
The RadConfirm returns the client result as an argument in its Callback function only,
as opposed to the standard browser confirm() function - the radconfirm() function returns a reference to the RadWindow dialog that is created and not the result.
The minimum required to show the RadConfirm is a message and the callback function:
radalert("Confirm returned the following result: " + arg);
<button onclick="radconfirm('Are you sure?', confirmCallBackFn); return false;">
The full syntax of the radconfirm() function is as follows:
var oConfirm = radconfirm(text, callBackFn, oWidth, oHeight, callerObj, oTitle, imgUrl);
where you can set optional width, height, title and image URL for the RadConfirm dialog.
This method also returns a reference to the RadAlert object (which is essentially a RadWindow), so you can use the
RadWindow's client-side API on it to further change it (titlebar icon, behaviors, etc.)
Calling RadConfirm from the code-behind
Since Q1 2011 the RadWindowManager offers a built-in server-side method to call the RadConfirm:
The Caller object parameter should have a null (Nothing) value, as it exists only for backwards compatibility.
If you change the default image the new one you provide should be 32px by 32px for best results. The string you pass to change the image URL can be:
an absolute URL, or a relative URL that can be resolved on the client (i.e. "~/" is not allowed).
This will set the image the URL points to
an empty string - this will remove the default image and leave the space empty
null - the behavior is the same as if no argument is provided - i.e. the default image is kept
The appearance of the confirm dialog is controled by two things: the Skin property of the RadWindowManager, and the values you pass in as arguments to RadConfirm. The arguments can include the HTML string you pass in as a message, the width, the height, and the Title string. The Skin property controls not only the appearance of the popup's title bar, but also the layout of the dialog: its icon, button style, and so on. This dialog layout and appearance is controlled by the confirm dialog template associated with the Skin. For details on how to customize the template, see Templates.