Working with RadioButton and DropDownList in ASP.NET MVC

A RadioButton and DropDownList plays a vital role in any project development and provide very essential function to work on. Hence here I am explaining how can we use radio buttons and dropdown list in ASP.NET MVC application.

Steps to use RadioButton and DropDownList

Step 1: Open Visual Studio 2010 and chose new>project



Step 2: Now select an empty asp.net mvc web application>Give name to the application and click on add.



Step 3: Now firstly route the path in global.asax.cs by manipulating the code as follows:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace Useofradiobypacific
{
    // Note: For instructions on enabling IIS6 or IIS7 classic mode,
    // visit http://go.microsoft.com/?LinkId=9394801
    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "PC", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );
        }
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            RegisterRoutes(RouteTable.Routes);
        }
    }
}

Step 4: Now add a new controller by following these steps:

1. Right click on the controller folder in solution explorer.
2. Chose add>controller and name the controller as show.

Step 5: Code the controller as per user requirement as in this example we want to use a radio button to chose the favorite technology and for the different employee of an organization:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Useofradiobypacific.Controllers
{
    [HandleError]
    public class PCController : Controller
    {
        public ActionResult Index()
        {
            ViewData["Message"] = "Welcome to  MCN SOLUTION PVT LTD";
            List<string> NameList = new List<string>();
            NameList.Add("Prashant");
            NameList.Add("Akash");
            NameList.Add("Arjun");
            NameList.Add("Darwin");
            ViewData["name"] = new SelectList(NameList);
            return View();
        }
        public ActionResult HandleForm(string name, string preferredtechnology)
        {
            ViewData["name"] = name;
            ViewData["preferredtechnology"] = preferredtechnology;
            return View("FormResults");
        }
    }
}

Step 5: After adding a controller, now add a view for the actionresult for which there will be two different views:

1. For Index
2. For Handleform

  

Step 6: Manipulate the Code of Index view as per user requirements using HTML:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Useofradiobypacific.Models.HomeModel>" %>
<h2><%= Html.Encode(ViewData["Message"]) %></h2>
<br /><br />
<% using(Html.BeginForm("HandleForm", "PC")) %>
<% { %>
    Enter your name: <%= Html.DropDownList("name")%>
<br /><br />
    Select your favorite color:<br />
    <%= Html.RadioButton("preferredtechnology", "DOTNET", true) %>DOTNET  <br />
    <%= Html.RadioButton("preferredtechnology", "JAVA", false)%> JAVA <br />
    <%= Html.RadioButton("preferredtechnology", "PHP", false)%> PHP <br />
    <%= Html.RadioButton("preferredtechnology", "ORACLE", false)%> ORACLE <br />
    <br /><br />
    <input type="submit" value="Submit" />
<% } %>

Step 7: Now change the code of Handleform view:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Useofradiobypacific.Models.HomeModel>" %>
<h2>FormResults</h2>
<p>
Your name: <b><%= Html.Encode(ViewData["name"])%></b>
</p>
<p>
Your favorite color: <b><%= Html.Encode(ViewData["favColor"]) %></b>
</p>

Now run the application to see the effect and we can use the RadioButton and DropDownList:



Image 2 showing dropdown list:


Conclusion : You can use these two tools any where in the application to make your application more effective.