C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.ComponentModel.DataAnnotations;

namespace HelloWorldMvcApp
{
	public class SampleViewModel
	{
		[Required]
		[MinLength(10)]
		[MaxLength(100)]
		[Display(Name = "Ask Magic 8 Ball any question:")]
		public string Question { get; set; }

		//See here for list of answers
		public string Answer { get; set; }
	}
}

Model

​x
 
using System;
using System.ComponentModel.DataAnnotations;
​
namespace HelloWorldMvcApp
{
    public class SampleViewModel
    {
        [Required]
        [MinLength(10)]
        [MaxLength(100)]
        [Display(Name = "Ask Magic 8 Ball any question:")]
        public string Question { get; set; }
​
        //See here for list of answers
        public string Answer { get; set; }
    }
}

@{
	Layout = null;
}

<!DOCTYPE html>
<!-- template from http://getbootstrap.com/getting-started -->

<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>Test Page</title>
	</head>
	
	<body>
		<div class="container">
			<div class="col-md-6 col-md-offset-3">
				<h1>Hello World</h1>
				<button id="btnAddField">Add Field</button>
	
				@using (Html.BeginForm())
				{
					@Html.AntiForgeryToken()
				
					<div id="fields"></div>
					
					<button>Submit</button>
				}
				
				
				<div style="color:blue"><b>Data:</b> @ViewBag.Data</div>
		<!-- JS includes -->
		<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
		
		<script type="text/javascript">
		
			$(document).ready(function() {
				var $fields = $('#fields');
				$('#btnAddField').click(function(e) {
					e.preventDefault();
					$('<input type="text" name="dynamicField" /><br/>').appendTo($fields);
				});
			});
	
		</script>
	</body>
</html>

View

 
@{
    Layout = null;
}
​
<!DOCTYPE html>
<!-- template from http://getbootstrap.com/getting-started -->
​
<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>Test Page</title>
    </head>
    
    <body>
        <div class="container">
            <div class="col-md-6 col-md-offset-3">
                <h1>Hello World</h1>
                <button id="btnAddField">Add Field</button>
    
                @using (Html.BeginForm())
                {
                    @Html.AntiForgeryToken()
                
                    <div id="fields"></div>
                    
                    <button>Submit</button>
                }
                
                
                <div style="color:blue"><b>Data:</b> @ViewBag.Data</div>
        <!-- JS includes -->
        <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
        
        <script type="text/javascript">
        
            $(document).ready(function() {
                var $fields = $('#fields');
                $('#btnAddField').click(function(e) {
                    e.preventDefault();
                    $('<input type="text" name="dynamicField" /><br/>').appendTo($fields);
                });
            });
    
        </script>
    </body>
</html>
​

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

namespace HelloWorldMvcApp
{
	public class HomeController : Controller
	{
		[HttpGet]
		public ActionResult Index()
		{
			return View();
		}
		
		[HttpPost]
		public ActionResult Index(string[] dynamicField)
		{
			ViewBag.Data = string.Join(",", dynamicField ?? new string[] {});
			return View();
		}

	}
}

Controller

 
using System;
using System.Web.Mvc;
using System.Collections.Generic;
​
namespace HelloWorldMvcApp
{
    public class HomeController : Controller
    {
        [HttpGet]
        public ActionResult Index()
        {
            return View();
        }
        
        [HttpPost]
        public ActionResult Index(string[] dynamicField)
        {
            ViewBag.Data = string.Join(",", dynamicField ?? new string[] {});
            return View();
        }
​
    }
}

View in Full Screen

View IL Code