I create a bunch of lines in a chart and then set them all but the first to invisible like this:
Visibility of these lines is controlled via checkboxes in a databound listbox in a radexpander and the lines are shown and hidden like this and this works great.
Things go bad when scroll and zoom get involved ... Zooming or unzooming a section of the chart enables visibility of all the lines which throws all of the checkboxes out of sync...
Ideas ?