How to call the methods in a dll from javascript?

Question

I created a c# class library. I need to to call a method in the library file javascript using the dll.The javascript will be embedded in a web page already created. The dll will be on the client machine. Can someone help?
Ps:the method returns a boolean

More details: Actually the website is a virtual web conferencing software in which each one has a particualr avatar. I have to detect whether a particular software(needed for making video calls) is installed in the user's system.If it is installed i have to indicate that by showing some special symbols on his avatar.I made a c# class library which returns "true" if the software is installed in the system.Now i have to embed this in the virtual conferencing web software

I am new to c# and javascript programming!

Can you be a little more specific? Will this web page just be browsed to or is it hosted in some way like through a WebBrowser control? — Lloyd
– Lloyd, Commented Aug 11, 2011 at 9:48
Is the DLL COM Visible? Does the web browser have weak security? You should keep the DLL server side and call it with AJAX perhaps. — Jodrell
– Jodrell, Commented Aug 11, 2011 at 9:48
"I am new to c# and javascript programming!" + Invoking DLLs on user-system from websites = security disaster ready to happen. — aero
– aero, Commented Aug 11, 2011 at 11:31

Ulrik Magnusson · Accepted Answer · 2011-08-11 09:57:29Z

3

Use the ActiveXObject class: http://www.dreamincode.net/forums/topic/38890-activex-with-c%23/

answered Aug 11, 2011 at 9:57

Ulrik Magnusson

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Yak S.D. · Accepted Answer · 2011-08-11 12:04:35Z

1

Possible solution:

You need to register your dll at the destination computer. Than in js you need to create ActiveX object with the same registered name

var ObjFromDll = new ActiveXObject("DllRegisteredName");

and call it's method.

var anyResult = ObjFromDll.MyMethod()

answered Aug 11, 2011 at 12:04

Yak S.D.

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