2. tbody sounds like it's a reference to a tbody element, so this is simply traversing the DOM tree. (Would be lots and lots easier using jQuery.)
Start with a tbody element
first child of the tbody would be the first tr element
last child of the tr would be the last cell [td or th]of the table
first child of the cell would be the first element in it.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com