Passing JS Object back into C#

[James Lamanna]

Hi,

Is there a way to pass a JS Object back into C# that's not a dictionary, string, integer, etc..?

I'm trying to use CEFSharp for hosting the Google Earth Plugin, and using C# bindings to the GEPlugin API, but I need a way to get the IGEPlugin object into C#.

The default C# WebBrowser lets me do this because I can specify a function with an 'object' type parameter, but I can't seem to do that with CEFSharp.

Thanks.

[James Lamanna]

I should also say I can use a method with prototype void(object o) in C#, except the parameter is always null.

-- James

[James Lamanna]

It looks like the main issue is that CEFSharp has no way to pass a generic object back to C#, through RegisterJSObject or EvaluateScript.

This is a big problem for me and my application.

-- James

[anthony taranto]

One of the forks on GitHub had some experimental code to covert arbitrary objects between js and c#. Obviously, that approach is going to be somewhat error prone. If there's any way for you to limit the cross language barrier in your application to primitives, your life will be much easier.

--Anthony

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[James Lamanna]

Hi Anthony,

Unfortunately in the Google Earth Plugin case its unavoidable.

The initialize functions give you back a COM object in JS that I need to marshal into C# somehow.

-- James

[James Lamanna]

Also where are those forks on GitHub?

Are they in a different project because I don't see any additional branches in the CefSharp GitHub repo.

-- James

[anthony taranto]

Branches and forks are two separate things:

https://github.com/ataranto/CefSharp/network

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[Jack O'Connor]

James, I'm not familiar with how the GEPlugin works, but one thing you could consider is using ExecuteScript from C# to talk to it. You can do that in an ad-hoc way if your not calling too many functions, or you might set up a sort of pub-sub event model that uses ExecuteScript and RegisterJsObject to marshal events back and forth.