Pass a variable from ASP.NET to HTML via Iframe?

Question

I don't know if this is even possible, but here goes: I have an ASP.NET page that contains an IFrame that calls an HTML page. Is it possible to pass a variable from the ASP.NET page to the HTML within the IFrame? More specifically, I'd like for the ASP.NET page to fill in one of the fields on the form within the HTML page.

Answer 1

You could do something like this:

window.frames['IFrameName'].document.getElementById('TextBoxID').value='YourValue';

Answer 2

If you only need it to work with the latest browsers then window.postMessage is the way to go to communicate between frames.

See: http://msdn.microsoft.com/en-us/library/cc197015