drop down box use to how to select another drop down box

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I having 3 drop down box "country", "State", "city". if i select "India" in country i should get states of India in state and if i select the "AP" in state then i should get the cities of AP in city. These data are in one table . How can i select this drop down

Posted 11-Jun-15 20:09pm

Unni R

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Torakami 12-Jun-15 2:21am

This is very bad practise of having all this things in one table , these must be mapped by foreign key relationshipand you must have three separate table

Saroj Kumar Sahu 12-Jun-15 2:36am

First you need to think how you'll get to know that which are country, which are states and which are city because you are using a single table.

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Mathew Soji · Answer 1 · 2015-06-11T20:56:00

Hi,

Please make sure you have data in separate table as a best practice.

For sample reference check the below links .

http://www.dotnetfox.com/articles/ajax-cascading-dropdown-example-with-database-in-Asp-Net-1078.aspx[^]

http://www.aspsnippets.com/Articles/Creating-Cascading-DropDownLists-in-ASP.Net.aspx[^]

http://www.aspdotnet-suresh.com/2011/01/introduction-here-i-will-explain-how-to.html[^]

http://www.asp.net/web-forms/overview/ajax-control-toolkit/cascadingdropdown/using-cascadingdropdown-with-a-database-cs[^]

For table design please refer below links .

http://stackoverflow.com/questions/10971300/what-is-the-best-way-to-design-a-city-state-country-table[^]

http://community.sitepoint.com/t/database-normalization-city-and-country-tables-etc/35444/4[^]

http://stackoverflow.com/questions/2007447/best-database-design-for-city-zip-state-tables[^]