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IJsDialogHandlerOnJSBeforeUnload Method
Version 51.0.0
When leaving the page a Javascript dialog is displayed asking for user confirmation. Returning True allows you to implement a custom dialog or programatically handle. To cancel the unload return True and set allowUnload to False.

Namespace: CefSharp
Assembly: CefSharp (in CefSharp.dll) Version: 51.0.0.0 (51.0.0.0)
Syntax
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bool OnJSBeforeUnload(
	IWebBrowser browserControl,
	IBrowser browser,
	string message,
	bool isReload,
	IJsDialogCallback callback
)

Parameters

browserControl
Type: CefSharpIWebBrowser
the browser control
browser
Type: CefSharpIBrowser
the browser object
message
Type: SystemString
message (optional)
isReload
Type: SystemBoolean
indicates a page reload
callback
Type: CefSharpIJsDialogCallback
Callback can be executed inline or in an async fashion

Return Value

Type: Boolean
Return false to use the default dialog implementation otherwise return true to handle
See Also