set default text for DropDownList

Hi

below is my table in database

I define 2 DropDownList  1-DDLCirty      2- DDlRegion   in show.aspx page and I define that when page is loading it just bind DDLcity  I mean in DDLCIty shows (Paris  and Italy) but in DDLregion doesn't show any thing and when users select Item from DDLcity according to their selected Item from DDLcity it bind DDLRegion i.e  if they select Paris in DDlregion  shows (1-2-3) and if they select Italy it shows(1-2)

now I want when page is loading in default in DDLcity shows Paris and In DDLregion Shows (1-2-3)

How I can do it?

Best Regards

Neda