DropDownList Helper to Handle HttpPost in MVC

Introduction

This article shows how to use a dropdownlist helper to handle HttpPost in MVC applications.

Create an ASP.Net Web Application

Figure 1: New Project

Choose MVC template

Figure 2: MVC Template

Set up an Entity Framework

Figure 3: Entity Framework

Add an Employee Controller

Figure 4: Employee Controller

Figure 5: MVC 5 Controller

Figure 6: Add Controller

EmployeeController.cs

using DropDownListPostApp_MVC.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace DropDownListPostApp_MVC.Controllers
{
public class EmployeeController : Controller
{
EmployeeEntities objEmployeeEntities = new EmployeeEntities();
public ActionResult Index()
{
ViewBag.List = new SelectList(objEmployeeEntities.Departments.Select(r => r.DepartmentName));
return View();
}
[HttpPost]
public string Index(string List)
{
if (string.IsNullOrEmpty(List))
{
return "Invalid Selection";
}
else
{
return "Selected Value is: " + List;
}
}
}
}