ASP.NET MVC Tip #41 ? Create Cascading Dropdown Lists with Ajax

In this tip, I demonstrate three methods of creating cascading drop down lists in an MVC application. First, I demonstrate how to write JavaScript code to update one dropdown list when another dropdown list changes. Next, I show you how you can retrieve the data for the dropdown lists from either a controller action or a web service. A reader of this blog emailed me recently and asked how he could create cascading dropdown lists in an MVC application. Why would you want to create cascading dropdown lists? Imagine that you want a user to select a car make and model. You display a dropdown list of car makes. Each time a user selects a new car make, a dropdown list displaying car models is populated (see Figure 1). Figure 1 – Cascading DropDown...(read more) ...