How to bind two dropdown list in asp.net?

hello,
i have two dropdown list in one form.i have to select a state from one dropdown list then in 2nd dropdown list should contain the cities related to that state.
how can i do that?
please give me proper code for that..

 

You should use code like this
<aspropDownList ID="DropDownList1" runat="server" Height="40px" Width="206px">
<asp:ListItem Value="India">delhi</asp:ListItem>
<asp:ListItem Value="India">Mumbai</asp:ListItem>
<asp:ListItem Value="USA">New York</asp:ListItem>
<asp:ListItem Value="USA">Washington</asp:ListItem>
</aspropDownList>
in value field add countries name of cities dropdown
and in country dropdown add countries name in lists...

on selected index changed event of country dropdown just match values of cities dropdown to lists of countries dropdown.... and show them as per their values like you select India as countries then by if condition check their values with cities drop down you can see the above code so if you select india it will show you delhi, mumbai... similarly if you select USA it will show you newyork washington...

You have other ways also to do this work you can do this with database where you have to create two tables...