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

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

Android - Basic Steps (Location & Maps)

Location Is composed by Latitude Longitude Time-stamp Accuracy Altitude Speed Bearing LocationProvider Types: Network  Wifi access points Cell phone towers GPS Passive Piggyback on the readings requested by other application Permissions Network  android.permission.ACCESS_COARSE_LOCATION android.permission.ACCESS_FINE_LOCATION GPS android.permission.ACCESS_FINE_LOCATION Passive Provider android.permission.ACCESS_FINE_LOCATION LocationManager System service for accessing location data getSystemService( Context.LOCATION_SERVICE ) Functions Determine the last known user location Register for location update Register to receive intents when the device nears or move away from a given geographic area LocationListener Defines callbacks methods that are called when Location or LocationProvider status change. Methods onLocationChanged(...) onProviderDisabled(...) onProviderEnabled(...) onStatusChan...
Publicar un comentario
Leer más

Android - Basic Steps (Sensors)

Sensors There are three types: Motion Position Environment ServiceManager Get a reference with   getSystemService(Context.SENSOR_SERVICE) Get a specific sensor SensorManager.getDefaultSensor(int type) Sensor Types Sensor.TYPE_ACCELEROMETER Sensor.TYPE_MAGNETIC_FIELD Sensor.TYPE_PRESSURE SensorEventListener Interface for SensorEvent callback When the accuracy has changed onAccuracyChanged() When has a new value onSensorChanged() SensorManager To register or unregister SensorEvents registerListener() unregisterListener() SensorEvents Include Data is sensor Sensor Type time-stamp Accuracy Measurement data Filters Low-pass Deemphasize transient force changes Emphasize constant force components Example Carpenter's level High-pass Emphasize transient force changes Deemphasize  constant force components Example Percussion instrument
Publicar un comentario
Leer más