Problem setting up my C# program to display XML results according to what my com

[timyoung]

I need to make it so that whenever I have "East" selected under my combobox for example, then only the list of parks with that particular location will show up. I also need to do the same for whichever facilities are selected and if the park falls within the opening and closing dates as well.

Here's the C# code I have
http://slexy.org/view/s2hCzH0TTk

Here's the full XML
http://slexy.org/view/s21nPdmJD9

And my XAML
http://slexy.org/view/s214kbuBdE

Any tips/help would be greatly appreciated,

Tim