Jquery using Cascading Dropdownlist Sample with database using ASP.NET

Here I will explain how to use Jquery cascading dropdownlist with database using ASP.NET.

Introduction
 
Description : I already explained how to populate dropdown based on another dropdown but now why I am explaining about this using Jquery for fetch data from webservice.

Here I will explain with two dropdowns State dropdown, City dropdown.and data will be manually fetch webservice using generic.How to Jquery work in this application see details.
 
Jquery Script


 
Design Page


 
After that design your aspx page like this
 
Web.config 


 
Add webservice in web.config file in appsettings.
 
Webservice Namespace
 
After that add one new webservice page to your application and following namcespaces in your webservice code behind page


 
Web services : 
 
After completion of writing namespaces and write the following code in webservice page


 
Demo
 
And last this application ‘s output is looks like this