Cascading Dropdown Lists with JSON Result
T o do a Cascading or dependent dropdownlist we start with a bound dropdownlist - could look something like this: The objective is to create or bind another dropdown after the selection of the networkId <select id="programId" name="programId" class="form-control"></select> Begin by adding the following function to your page - this clears any existing results, pulls in new results and populates our 2nd dropdownlist (programid) $(function () { The last thing we need is to look at our JsonResult query @Html.DropDownList("networkId", null, "Select a Network", htmlAttributes: new { @class = "form-control" }) So first we need to add a placeholder: There are several ways to do this but we are going to do it with Jquery and a JsonResult in our controller. $('#networkId').change(function () { ...