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MVC 4 - Razor (Controller)

Controller


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Globalization;
using PhotoSharingApplication.Models;

 namespace PhotoSharingApplication.Controllers
{
    [ValueReporter]
    public class PhotoController  : Controller
    {

        private PhotoSharingContext context = new PhotoSharingContext();

         public ActionResult Index()
        {
            return View("Index", context.Photos.ToList());
        }

         public ActionResult Display(int id)
        {
            Photo photo = context.Photos.Find(id);
            if (photo == null)
            {
                return HttpNotFound();
            }

             return View("Display", photo);
        }

         public ActionResult Create()
        {
            Photo newPhoto = new Photo();
            newPhoto.CreatedDate = DateTime.Today;
            return View("Create", newPhoto);
        }

         [HttpPost]
        public ActionResult Create(Photo photo, HttpPostedFileBase image)
        {
            photo.CreatedDate = DateTime.Today;

             if (!ModelState.IsValid)
            {
                return View("Create", photo);
            }
            else
            {
                if (image != null)
                {
                    photo.ImageMimeType =
                       image.ContentType;

                    photo.PhotoFile = new
                             byte[image.ContentLength];
                    image.InputStream.Read(
                       photo.PhotoFile, 0,
                       image.ContentLength);
                }
            }

             context.Photos.Add(photo);
            context.SaveChanges();
            return RedirectToAction("Index");
        }
        public ActionResult Delete(int id)
        {
            Photo photo = context.Photos.Find(id);

             if (photo == null)
            {
                return HttpNotFound();
            }

             return View("Delete", photo);

         }

         [HttpPost]
        [ActionName("Delete")]
        public ActionResult DeleteConfirmed
           (int id)
        {
            Photo photo = context.Photos.Find(id);
            context.Photos.Remove(photo);
            context.SaveChanges();
            return RedirectToAction("Index");

         }

         public FileContentResult GetImage(int id)
        {
            Photo photo = context.Photos.Find(id);
            if (photo != null)
            {
                return File(photo.PhotoFile,
                   photo.ImageMimeType);
            }
            else
            {
                return null;
            } 
        }


    }
}


Adding filter

namespace PhotoSharingApplication.Controllers
{
    public class ValueReporter : ActionFilterAttribute
    {
        private void logValues(RouteData routeData)
        {
            var controller = routeData.Values["controller"];
            var action = routeData.Values["action"];
            string message = string.Format(
               "Controller: {0}; Action: {1}",
               controller, action);
            Debug.WriteLine(message, "Action Values");

            foreach (var item in routeData.Values)
            {
                Debug.WriteLine(">> Key: {0}; Value: {1}", item.Key, item.Value);
            }

        }

        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            logValues(filterContext.RouteData);
        }


    }
}


Creating a quick View

@model IEnumerable<PhotoSharingApplication.Models.Photo>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table>
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Title)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ImageMimeType)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Description)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.CreatedDate)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.UserName)
        </th>
        <th></th>
    </tr>

    @foreach (var item in Model)
    {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.Title)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.ImageMimeType)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Description)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.CreatedDate)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.UserName)
            </td>
            <td>
                @Html.ActionLink("Edit", "Edit", new { id = item.PhotoID }) |
                @Html.ActionLink("Display", "Display", new { id = item.PhotoID }) |
                @Html.ActionLink("Delete", "Delete", new { id = item.PhotoID })
            </td>
        </tr>
    }

</table>



Defining Child Action

  • _PhotoGallery is a child of Index
 public ActionResult Index()
        {
            return View("Index");
        }

        [ChildActionOnly]
        public ActionResult _PhotoGallery(int number = 0)
        {
            List<Photo> photos;
            if (number == 0)
            {
                photos = context.Photos.ToList();
            }
            else
            {
                photos = (
                      from p in context.Photos
                      orderby p.CreatedDate descending
                      select p).Take(number).ToList();
            }

            return PartialView("_PhotoGallery", photos);
        }


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