not all code paths return a value

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.NET

.NET4.5

MVC5

Hi friends,
i have created a form with two buttons like submit and cancel.
i want to perform action for both method. but it doesn't work..


Here is my controller:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using WebApplication8.Models;

namespace WebApplication8.Controllers
{
    public class personController : Controller
    {
        //
        // GET: /person/
        public ActionResult Index()
        {
            return View();
        }
        [HttpPost]
        public ActionResult disp(studentmodel model, string command)
        {
            try
            {
                if (command == "Create")
                {
                    return View("shows", model);
                }
                else if (command == "cancel")
                {
                    return RedirectToAction("Index", "person");
                }
            }
            catch(Exception e)
            {
                return View("Index");
            }
        }
  
	}
}

Here is my index html file:

@model WebApplication8.Models.studentmodel


@using (Html.BeginForm("disp","person")) 
{
    @Html.AntiForgeryToken()
    
    <div class="form-horizontal">
        <h4>studentmodel</h4>
        <hr />
        @Html.ValidationSummary(true)

        <div class="form-group">
            @Html.LabelFor(model => model.name, new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.name)
                @Html.ValidationMessageFor(model => model.name)
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" name="command" class="btn btn-default" />
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="cancel" name="command" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

[edit] Code block added - OriginalGriff[/edit]