Ir al contenido principal

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);
        }


Comentarios

Publicar un comentario

Entradas populares de este blog

Python create package

Create a root folder Create a sub-folder "example_pkg" that contains the funtionallity packaging_tutorial/ example_pkg/ __init__.py In the root folder create the following structure  packaging_tutorial/ example_pkg/ __init__.py tests/ setup.py LICENSE README.md in the setup.py contains the configuration of the packages your package is found by find_packages() import setuptools with open ( "README.md" , "r" ) as fh : long_description = fh . read () setuptools . setup ( name = "example-pkg-YOUR-USERNAME-HERE" , # Replace with your own username version = "0.0.1" , author = "Example Author" , author_email = "author@example.com" , description = "A small example package" , long_description = long_description , long_description_content_type = "text/markdown" , url = "https://github.com/pypa/sam...
Publicar un comentario
Leer más

Rails - Basic Steps III

pValidations Validations are a type of ActiveRecord Validations are defined in our models Implement Validations Go to   root_app/app/models Open files  *.rb for each model Mandatory field validates_presence_of   :field Ex:   validates_presence_of    :title Classes The basic syntax is class MyClass        @global_variable                def my_method              @method_variable        end end Create an instance myInstance = MyClass.new Invoke a mehod mc.my_method class() method returns the type of the object In Ruby, last character of method define the behavior If ends with a question -> return a boolean value If ends with an exclamation -> change the state of the object Getter / Setter method def global_variable       return @global_variable end ...
Publicar un comentario
Leer más

Android - Basic Steps (Service)

Service Run in the main thread of the hosting application Android can kill the Service if need the resources Purpose Supporting inter-application method execution Performing background processing Start a Service Call Context.startService(Intent intent)\ To call from a Fragment use getActivity().getApplicationContext().startService( intentService); Executing the service After call startService(...)  In the Service is executed the method onStartCommand(...) If the method returns the constant START_NOT_STICKY then Android will not restart the service automatically if the the process is killedp Foreground To execute the service foreground call the method startForeground() Use this if the user is aware of the process Bind to a Service Call the method Context.bindService( Intent service ServiceConnection con int flags ) Send Toast from the Service On the method onStartCommand receive the message   ...
Publicar un comentario
Leer más