ado.net question on combo box

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There is two combo box
one is state and the other is district
If we select one state then auomatically the district of that state will appesr in the district combobox?
Plz tell me the coding

Posted 25-Feb-13 5:57am

Debashree Ghosh

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Abhinav S 25-Feb-13 12:00pm

ASP.Net or Windows Forms?

RDBurmon 25-Feb-13 12:15pm

are you using any database to store state and district ?

[no name] 25-Feb-13 12:34pm

Please code that code that you have tried and describe the problem that you are having with the code.

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Sandeep Mewara · Answer 1 · 2013-02-25T07:50:00

It's called Cascading Dropdown.

For Web, look here:
CascadingDropDown Demonstration[^]
AJAX Cascading Dropdown Example using SQL Database[^]
Populate Cascading DropDownList On Selection ASP.NET[^]

If not update panels, then you need to use traditional AJAX - XMLHttpRequest.
Refer:
AJAX for beginners (Part 2) - Using XMLHttpRequest and jQuery AJAX to implement a cascading dropdown[^]

For Winforms, look here:
Cascading ComboBox In Winforms Windows Forms C# VB.NET[^]