Imagine you have 3 dropdownlist controls representing:
Country State/Province City/Town
First the user selects a country, then a state/province, then a city/town. However, further imagine that the first item in every list is a blank field with a value of "-1". Given this, if the user changes the country back to 'blank' then the state/province
and city/town dropdownlist controls must be both cleared and disabled.
For the country dropdownlist control, I can do this but need to add all the necessary code in its "SelectedIndexChanged" event handler. However, I would much prefer to only add the code for clearing & disabling the state/province dropdownlist and then be
able to call the state/province's own 'SelectedIndexChanged' event handler, which in turn would clear & disable the city/town dropdownlist.
Does that make sense?
Put another way, I'm having to duplicate ...
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