如何在cefsharp中捕获/监听javascript函数或事件

Question

I am trying to use cefSharp for a WPF application. I can find "how to call a Javascript methods from .Net . But is there a way where I can get notified for Javascript functions or events in .Net?

eg if there is a Javascript function (with and without param) I can get the notification with or without values in .Net.

Answer 1

In short, YES! There's bindings available for:

c# -> js use

webBrowser.ExecuteScriptAsync(script);

js -> c# use

webBrowser.RegisterJsObject(A_NAME_FROM_JS, objectToBind);

Then from js you can call:

window.A_NAME_FROM_JS.MethodOnObj()

and this will invoke the

MethodOnObj()

on the passed

objectToBind

It works like a charm. Let me know if you've an issue and I'll help further!

Answer 2

The RegisterJsObject and ExecuteScriptAsync methods are both deprecated now. I found another solution that CefSharp supports here:

https://github.com/cefsharp/CefSharp/wiki/Frequently-asked-questions#JSEvent

More detailed information is here: https://github.com/cefsharp/CefSharp/issues/2775#issuecomment-498454221

Essentially, from your javascript code on page, you can call:

CefSharp.PostMessage(someDataYouWantToPassBack)

And in C# , you register the event to your browser:

browser. JavascriptMessageReceived += OnBrowserJavascriptMessageReceived;

private void OnBrowserJavascriptMessageReceived(object sender, JavascriptMessageReceivedEventArgs e) { }