Special case when calling InvokeScript with WebBrowser control

I am trying to use InvokeScript method on the WebBrowser control to execute a script on the web page that has been loaded into my WebBrowser control. If I am calling just a simple javascript function, this works properly. However,开发者_如何学C the javascript function that I am trying to call is nested within a variable like this:

var holder = 
{ 
    DoA: function() 
    {
         ....
    },
    DoB: function()
    {
         .....
    }
}

Calling holder.DoA works fine when called from within the javascript, but the function is not called successfully when I try to call it from within my C# code like this:

object obj1 = m_webBrowser.Document.InvokeScript("holder.DoA");

Any ideas?

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I had the same problem and I got it to work like this:

m_webBrowser.Document.InvokeScript("eval", new object[] { "holder.DoA()" });

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Have you tried window.holder.DoA as the parameter to InvokeScript ?

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That's a singleton JSON class. If holder is a global variable, you can get its reference by calling IHTMLDocument::Script.

I am not sure whether Type.InvokeMember would work on a JSON object since the methods are added at runtime, try query IDispatchEx interface from the object to call the methods.