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JsDialogHandlerOnBeforeUnloadDialog Method

Version 130.1.90
Called to run a dialog asking the user if they want to leave a page. Return false to use the default dialog implementation. Return true if the application will use a custom dialog or if the callback has been executed immediately. Custom dialogs may be either modal or modeless. If a custom dialog is used the application must execute callback once the custom dialog is dismissed.

Namespace: CefSharp.Handler
Assembly: CefSharp (in CefSharp.dll) Version: 129.0.110.0 (129.0.110.0)
Syntax
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protected virtual bool OnBeforeUnloadDialog(
	IWebBrowser chromiumWebBrowser,
	IBrowser browser,
	string messageText,
	bool isReload,
	IJsDialogCallback callback
)

Parameters

chromiumWebBrowser  IWebBrowser
the ChromiumWebBrowser control
browser  IBrowser
the browser object
messageText  String
message text (optional)
isReload  Boolean
indicates a page reload
callback  IJsDialogCallback
Callback can be executed inline or in an async fashion

Return Value

Boolean
Return false to use the default dialog implementation otherwise return true to handle with your own custom implementation.
See Also