kevinya

add folder structure "Query/Actors" under "Models" folder:
and
add a class "CustomizedIndex.cs" under  folder "Models/Query/Actors", this class is for customized query result

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

namespace MVC_5.Models.Query.Actors
{
    public class CustomizedIndex
    {
        public int Id { get; set; }
        [Display(Name = "FirstName")]
        public string FirstName { get; set; }
        [Display(Name = "LastName")]
        public string LastName { get; set; }
        //THIS is your custom column!!
        [Display(Name = "FirstNameAndLastName")]
        public string FirstNameAndLastName { get; set; }
        [Display(Name = "Title")]
        public string Title { get; set; }
    }
}

add a view "CustomizedIndex.cshtml" under folder "Views/Actors":
this view will use type of "CustomizedIndex.cs" as its query result

@model IEnumerable<MVC_5.Models.Query.Actors.CustomizedIndex>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.FirstName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.LastName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.FirstNameAndLastName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Title)
        </th>
        <th></th>
    </tr>

    @foreach (var item in Model)
    {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.FirstName)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.LastName)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.FirstNameAndLastName)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Title)
            </td>
            <td>
                @Html.ActionLink("Edit", "Edit", new { id = item.Id }) |
                @Html.ActionLink("Details", "Details", new { id = item.Id }) |
                @Html.ActionLink("Delete", "Delete", new { id = item.Id })
            </td>
        </tr>
    }

</table>

add following code to controller "ActorsController.cs":
linq do the customized query

public ActionResult CustomizedIndex()
{
	using (MyDBEntities db = new MyDBEntities())
	{
		var customQuery = from emp in db.Actor
							  //you must convert query result to type "CustomizedIndex"
						  select new MVC_5.Models.Query.Actors.CustomizedIndex()
						  {
							  Id = emp.Id,
							  FirstName = emp.FirstName,
							  LastName = emp.LastName,
							  //FirstNameAndLastName is my customized column
							  //try to join any other more tables to make
							  //your own custom column
							  FirstNameAndLastName = emp.FirstName + emp.LastName,
							  Title = emp.Title
						  };

		return View(customQuery.ToList());
	}

}

execute the project:
done! customized column is completed!

Project direct download

Reference:
Convert the result of LINQ query to list of Custom Model
https://stackoverflow.com/questions/41469611/convert-the-result-of-linq-query-to-list-of-custom-model?rq=1&utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa