20 Recipes for Programming MVC 3 by Jamie Munro

Author:Jamie Munro [Jamie Munro]
Language: eng
Format: epub
Tags: COMPUTERS / Programming / Microsoft Programming
ISBN: 9781449309855
Publisher: O'Reilly Media
Published: 2011-09-28T16:00:00+00:00

The Edit function is updated to first call the DeleteFile function, then call the UploadFile function.

The DeleteConfirmed function is updated to call the DeleteFile function before deleting the book from the database.

using System; using System.Collections.Generic; using System.Data; using System.Data.Entity; using System.Linq; using System.Linq.Dynamic; using System.Web; using System.Web.Mvc; using MvcApplication4.Models; using MvcApplication4.Utils; using PagedList; namespace MvcApplication4.Controllers { public class BooksController : Controller { private BookDBContext db = new BookDBContext(); ... // // GET: /Books/Create public ActionResult Create() { return View(); } // // POST: /Books/Create [HttpPost] public ActionResult Create(Book book, HttpPostedFileBase file) { if (ModelState.IsValid) { // Upload our file book.Thumbnail = FileUpload.UploadFile(file); db.Books.Add(book); db.SaveChanges(); return RedirectToAction("Index"); } return View(book); } // // GET: /Books/Edit/5 public ActionResult Edit(int id) { Book book = db.Books.Find(id); return View(book); } // // POST: /Books/Edit/5 [HttpPost] public ActionResult Edit(Book book, HttpPostedFileBase file) { if (ModelState.IsValid) { // Delete old file FileUpload.DeleteFile(book.Thumbnail); // Upload our file book.Thumbnail = FileUpload.UploadFile(file); db.Entry(book).State = EntityState.Modified; db.SaveChanges(); return RedirectToAction("Index"); } return View(book); } // // GET: /Books/Delete/5 public ActionResult Delete(int id) { Book book = db.Books.Find(id); return View(book); } // // POST: /Books/Delete/5 [HttpPost, ActionName("Delete")] public ActionResult DeleteConfirmed(int id) { Book book = db.Books.Find(id); // Delete old file FileUpload.DeleteFile(book.Thumbnail); db.Books.Remove(book); db.SaveChanges(); return RedirectToAction("Index"); } ... } }

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