I want to find out how to build form with best practice and surfacecontroller by using an example ( http://www.computermagic.gr/tutorials/umbraco-7/custom-tables-with-petapoco/introduction/ ), I would like to add this example with a controller.

Created me a model:

using System;
using System.ComponentModel.DataAnnotations;
using Umbraco.Core.Persistence;
using Umbraco.Core.Persistence.DatabaseAnnotations;

namespace BestPractice.RegForms.Models
{
    [TableName("CMAuthors")]
    [PrimaryKey("AuthorID", autoIncrement = true)]
    [ExplicitColumns]
    public class AuthorViewModel
    {
        [Column("AuthorID")]
        [PrimaryKeyColumn(AutoIncrement = true)]
        public int AuthorID { get; set; }

        [Column("Name")]
        [Length(20)]
        public string Name { get; set; }

        [Column("Surname")]
        [Length(20)]
        public string Surname { get; set; }

        [Column("DateOfBirth")]
        public DateTime DateOfBirth { get; set; }


    }
}

And a Repository (like in the example):

using BestPractice.RegForms.Models;
using System.Collections.Generic;
using Umbraco.Core.Persistence;

namespace BestPractice.RegForms.Repository
{
    public static class AuthorsRepository
    {
        public static IList<AuthorViewModel> GetAll()
        {
            UmbracoDatabase db = Umbraco.Core.ApplicationContext.Current.DatabaseContext.Database;
            return db.Fetch<AuthorViewModel>("SELECT * FROM CMAuthors ORDER BY Surname, Name");
        }

        public static Page<AuthorViewModel> GetAllPaged(int Page, int RecordsPerPage)
        {
            UmbracoDatabase db = Umbraco.Core.ApplicationContext.Current.DatabaseContext.Database;
            return db.Page<AuthorViewModel>(Page, RecordsPerPage, "SELECT * FROM CMAuthors ORDER BY Surname, Name");
        }

        public static AuthorViewModel GetByAuthorID(int AuthorID)
        {
            UmbracoDatabase db = Umbraco.Core.ApplicationContext.Current.DatabaseContext.Database;
            List<AuthorViewModel> Records = db.Fetch<AuthorViewModel>("SELECT * FROM CMAuthors WHERE AuthorID = @0", AuthorID);

            if (Records.Count > 0)
                return Records[0];
            else
                return null;
        }

        public static AuthorViewModel Save(AuthorViewModel item)
        {
            UmbracoDatabase db = Umbraco.Core.ApplicationContext.Current.DatabaseContext.Database;
            db.Save(item);
            return item;
        }

        public static int DeleteByAuthorID(int AuthorID)
        {
            //UmbracoDatabase _database = Umbraco.Core.ApplicationContext.Current.DatabaseContext.Database;
            //return _database.Execute("DELETE FROM CMAuthors WHERE AuthorID = @0", AuthorID);
            UmbracoDatabase db = Umbraco.Core.ApplicationContext.Current.DatabaseContext.Database;
            return db.Execute("DELETE FROM CMAuthors WHERE AuthorID = @0", AuthorID);
        }
    }
}

The controller:

using BestPractice.RegForms.Models;
using BestPractice.RegForms.Repository;
using System.Web.Mvc;
using Umbraco.Web.Mvc;

namespace BestPractice.RegForms.Controllers
{
    public class AuthorSurfaceController : SurfaceController
    {
        /// <summary>
        /// Renders the Author Form
        /// @Html.Action("AuthorForm","AuthorSurface");
        /// </summary>
        /// <returns></returns>
        public ActionResult RenderAuthorForm()
        {
            //Return partial view /views/Partials/AuthorForm.cshtml 
            //(should it be /views/AuthorSurface/AuthorForm.cshtml)?
            //with an empty/new AuthorViewModel
            return PartialView("AuthorForm", new AuthorViewModel());

            //return PartialView("AuthorForm", AuthorsRepository.GetAll());
            //return PartialView("AuthorForm", AuthorsRepository.GetByAuthorID(1));
            //return PartialView("AuthorForm", AuthorsRepository.DeleteByAuthorID(1));
        }
    }
}

Here are the (partial) view:

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage
@inherits Umbraco.Web.Mvc.UmbracoViewPage<BestPractice.RegForms.Models.AuthorViewModel>

@if (TempData["success"] == null)
{
    using (Html.BeginUmbracoForm<BestPractice.RegForms.Controllers.AuthorSurfaceController>("RenderAuthorForm"))
    {
        @Html.AntiForgeryToken()

        @Html.TextBoxFor(m => m.Name, new { @Class = "name", placeholder = "Navn" })
        @Html.ValidationMessageFor(m => m.Name)
        <br />

        @Html.TextBoxFor(m => m.Surname, new { @Class = "surname", placeholder = "Etternavn" })
        @Html.ValidationMessageFor(m => m.Surname)
        <br />

        @Html.TextBoxFor(m => m.DateOfBirth, "{0:dd.MM.yyyy}", new { @Class = "dateofbirth", placeholder = DateTime.Now })
        @Html.ValidationMessageFor(m => m.DateOfBirth)
        <br />

        <button id="contact-submit" type="submit">Send</button>
    }
}
else
{
    <p>Ny forfatter er registrert</p>
}

And macro to retrieve partial view (into the content in a template):

@inherits Umbraco.Web.Macros.PartialViewMacroPage
@Html.Action("RenderAuthorForm", "AuthorSurface")

How can all classes from the repository be inserted into the controller, and how can all these classes be used in the (partial) view, and is this a good way to do this (I want to develope forms with CRUD from members in a universal method that works in both small and large solutions).