CefSharp Object Undefined Issue

It sounds super frustrating when your setup just won’t work as expected! There are a few things you can try to get that CefSharp object recognized in your JavaScript.

1. Check Your CefSharp Initialization

Make sure you have correctly initialized CefSharp in your C# application. You would typically do something like this:

var browser = new ChromiumWebBrowser("your_local_html_file.html");
    browser.RegisterJsObject("cefSharpObject", new YourCSharpClass());

Make sure that “cefSharpObject” is the name you’re trying to use in your JavaScript.

2. Timing Matters!

JavaScript can be a bit tricky since it runs in a different context. Ensure you’re calling your JavaScript after the CefSharp object has been initialized. You can do this by putting your script at the bottom of your HTML:

<script>
        window.onload = function() {
            console.log(cefSharpObject); // Check if it's defined
        };
    </script>

3. Verify the Context Settings

Sometimes the CefSharp object isn’t accessible due to context settings. Check if you’re using a standard browser handler or a custom one. Make sure in your CefSettings, you are setting:

settings.RegisterJsObject("cefSharpObject", new YourCSharpClass());

4. Look for Errors

Keep an eye on the developer console (F12) for any JavaScript errors. Sometimes, something else can block it from working.

5. Example of Calling C# Method

Here’s a simple example of how you can call a C# method from JavaScript:

function callCSharp() {
        cefSharpObject.someMethod(); // This should call your C# method
    }

6. Double Check Your HTML and C# Integration

Be sure the loading of your HTML is correct. Anything that runs before your CefSharp setup will not work.

Final Thoughts

If it still doesn’t work, you might wanna check the documentation for your CefSharp version or look for others who’ve faced a similar problem.

Good luck, and hang in there!