Dropdown in ASP.Net MVC | C# Online Compiler

Dropdown in ASP.Net MVC by Anonymous

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

namespace HelloWorldMvcApp
{
	public class Product
	{
		public int Id {	get; set; }
		public string Name { get; set; }
	}

	public class Search
	{
		public string Title {get; set; }
		[Display (Name= "Select the phone")]
		public int SelectedProductId { get;	set; }
		public IEnumerable<System.Web.Mvc.SelectListItem> ProductItems { get; set; }
	}

	public sealed class ProductRepository : IProductRepository
	{
		readonly List<Product> fakeData = new List<Product>();
		public ProductRepository()
		{
			fakeData.Add(new Product() { Id = 1, Name = "iPhone" });
			fakeData.Add(new Product() { Id = 2, Name = "Windows Phone"});
			fakeData.Add(new Product() { Id = 3, Name = "Android" });
		}

		public IQueryable<Product> All
		{
			get { return fakeData.AsQueryable(); }
		}
	}

	public interface IProductRepository
	{
		IQueryable<Product> All	{get;}
	}

	public static class Extensions
	{
        public static IEnumerable<SelectListItem> ToSelectListItems(this IEnumerable<Product> items, 
																	int selectedId = -1)
        {
            IEnumerable<SelectListItem> selectListItems = items.OrderBy(i => i.Name)
                  .Select(product => new SelectListItem
                      {
                          Selected = (product.Id == selectedId),
                          Text = product.Name,
                          Value = product.Id.ToString()
                      });
            return DefaultItem.Concat(selectListItems);
        }

        public static IEnumerable<SelectListItem> DefaultItem
        {
            get
            {
                return Enumerable.Repeat(new SelectListItem
                {
                    Value = "-1",
                    Text = "Select an item"
                }, count: 1);
            }
        }
	}
}

Model

​x
 
using System;
using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
​
namespace HelloWorldMvcApp
{
    public class Product
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }
​
    public class Search
    {
        public string Title {get; set; }
        [Display (Name= "Select the phone")]
        public int SelectedProductId { get; set; }
        public IEnumerable<System.Web.Mvc.SelectListItem> ProductItems { get; set; }
    }
​
    public sealed class ProductRepository : IProductRepository
    {
        readonly List<Product> fakeData = new List<Product>();
        public ProductRepository()
        {
            fakeData.Add(new Product() { Id = 1, Name = "iPhone" });
            fakeData.Add(new Product() { Id = 2, Name = "Windows Phone"});
            fakeData.Add(new Product() { Id = 3, Name = "Android" });
        }
​
        public IQueryable<Product> All
        {
            get { return fakeData.AsQueryable(); }
        }
    }
​
    public interface IProductRepository
    {
        IQueryable<Product> All {get;}
    }
​
    public static class Extensions
    {
        public static IEnumerable<SelectListItem> ToSelectListItems(this IEnumerable<Product> items, 
                                                                    int selectedId = -1)
        {
            IEnumerable<SelectListItem> selectListItems = items.OrderBy(i => i.Name)
                  .Select(product => new SelectListItem
                      {
                          Selected = (product.Id == selectedId),
                          Text = product.Name,
                          Value = product.Id.ToString()
                      });
            return DefaultItem.Concat(selectListItems);
        }
​
        public static IEnumerable<SelectListItem> DefaultItem
        {
            get
            {
                return Enumerable.Repeat(new SelectListItem
                {
                    Value = "-1",
                    Text = "Select an item"
                }, count: 1);
            }
        }
    }
}

@model HelloWorldMvcApp.Search
@{
	Layout = null;
}

<!DOCTYPE html>

<html lang="en">
	<head>
		<meta charset="utf-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>DropDownList on ASP.Net MVC</title>

		<!-- CSS Includes -->
		<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
		
		<style type="text/css">

			.field-validation-error {
				color: #ff0000;
			}

		</style>
	</head>
	<body>
		<div class="container">
			<div class="col-md-6 col-md-offset-3">
				<h1>Hello Stranger</h1>
	
				@using (Html.BeginForm()) {
				@Html.AntiForgeryToken()
				@Html.ValidationSummary(true)
			
				<fieldset>
					<legend>Search</legend>
			
					<div class="editor-label">
						@Html.LabelFor(model => model.Title)
					</div>
					<div class="editor-field">
						@Html.EditorFor(model => model.Title)
						@Html.ValidationMessageFor(model => model.Title)
					</div>
			
					<div class="editor-label">
						@Html.LabelFor(model => model.SelectedProductId)
					</div>
					<div class="editor-field">
						@Html.DropDownListFor(m => m.SelectedProductId, Model.ProductItems)
						@Html.ValidationMessageFor(model => model.SelectedProductId)
					</div>
			
					<p>
						<br><input type="submit" value="Search" />
					</p>
				</fieldset>
				}
	
				<br/><br/>
				<div class="alert alert-warning fade">
					<img src="//dl.dropboxusercontent.com/s/lq0mgxtxtc4uj1e/morph.jpg?dl=1&token_hash=AAGm5lEcLzicmV_-T4h6Hc_3iBvhKVerZlOjvGP_vjpoJQ" /><br/><br/>
					<strong><span class="alert-content"></span></strong>
				</div>
			</div>
		</div>
		<!-- JS includes -->
		<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
		<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
		<script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script>
		<script src="//ajax.aspnetcdn.com/ajax/mvc/4.0/jquery.validate.unobtrusive.min.js"></script>
	</body>
</html>

View

 
@model HelloWorldMvcApp.Search
@{
    Layout = null;
}
​
<!DOCTYPE html>
​
<html lang="en">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>DropDownList on ASP.Net MVC</title>
​
        <!-- CSS Includes -->
        <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
        
        <style type="text/css">
​
            .field-validation-error {
                color: #ff0000;
            }
​
        </style>
    </head>
    <body>
        <div class="container">
            <div class="col-md-6 col-md-offset-3">
                <h1>Hello Stranger</h1>
    
                @using (Html.BeginForm()) {
                @Html.AntiForgeryToken()
                @Html.ValidationSummary(true)
            
                <fieldset>
                    <legend>Search</legend>
            
                    <div class="editor-label">
                        @Html.LabelFor(model => model.Title)
                    </div>
                    <div class="editor-field">
                        @Html.EditorFor(model => model.Title)
                        @Html.ValidationMessageFor(model => model.Title)
                    </div>
            
                    <div class="editor-label">
                        @Html.LabelFor(model => model.SelectedProductId)
                    </div>
                    <div class="editor-field">
                        @Html.DropDownListFor(m => m.SelectedProductId, Model.ProductItems)
                        @Html.ValidationMessageFor(model => model.SelectedProductId)
                    </div>
            
                    <p>
                        <br><input type="submit" value="Search" />
                    </p>
                </fieldset>
                }
    
                <br/><br/>
                <div class="alert alert-warning fade">
                    <img src="//dl.dropboxusercontent.com/s/lq0mgxtxtc4uj1e/morph.jpg?dl=1&token_hash=AAGm5lEcLzicmV_-T4h6Hc_3iBvhKVerZlOjvGP_vjpoJQ" /><br/><br/>
                    <strong><span class="alert-content"></span></strong>
                </div>
            </div>
        </div>
        <!-- JS includes -->
        <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
        <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
        <script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script>
        <script src="//ajax.aspnetcdn.com/ajax/mvc/4.0/jquery.validate.unobtrusive.min.js"></script>
    </body>
</html>

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

namespace HelloWorldMvcApp
{
	public class HomeController : Controller
	{
        readonly IProductRepository repo = new ProductRepository();

		[HttpGet]
        public ActionResult Index()
        {
            var search = new Search();

            IEnumerable<SelectListItem> products = 
				repo.All.AsEnumerable().ToSelectListItems();
            search.ProductItems = new SelectList(products, "Value", "Text");

            return View(search);
        }

        [HttpPost]
        public ActionResult Index(Search search)
        {
            IEnumerable<SelectListItem> products = 
				repo.All.AsEnumerable().ToSelectListItems(search.SelectedProductId);
            search.ProductItems = new SelectList(products, "Value", "Text");

            return View(search);
        }
	}
}

Controller

 
using System;
using System.Web.Mvc;
using System.Collections.Generic;
using System.Linq;
​
namespace HelloWorldMvcApp
{
    public class HomeController : Controller
    {
        readonly IProductRepository repo = new ProductRepository();
​
        [HttpGet]
        public ActionResult Index()
        {
            var search = new Search();
​
            IEnumerable<SelectListItem> products = 
                repo.All.AsEnumerable().ToSelectListItems();
            search.ProductItems = new SelectList(products, "Value", "Text");
​
            return View(search);
        }
​
        [HttpPost]
        public ActionResult Index(Search search)
        {
            IEnumerable<SelectListItem> products = 
                repo.All.AsEnumerable().ToSelectListItems(search.SelectedProductId);
            search.ProductItems = new SelectList(products, "Value", "Text");
​
            return View(search);
        }
    }
}

View in Full Screen

Hello World!!
10 + 20 = 30
10,20,30
10 + 20 = 30

Cached Result
Last Run:	1:11:19 pm
Compile:	0.11s
Execute:	0s
Memory:	0b
CPU:	0s

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