public void Delete(int id)
{
var album = db.Albums.FirstOrDefault(f => f.AlbumID == id);
if (album != null)
{
db.Entry(album).State = EntityState.Deleted;
}
db.SaveChangesAsync();
}
public void Delete(int id)
{
var comment = db.Comments.FirstOrDefault(f => f.CommentID == id);
if (comment != null)
{
db.Entry(comment).State = EntityState.Deleted;
}
db.SaveChanges();
}
public void Delete(int id)
{
var photo = db.Photos.FirstOrDefault(f => f.PhotoID == id);
if (photo != null)
{
db.Entry(photo).State = EntityState.Deleted;
}
db.SaveChangesAsync();
}
public void Delete(string id)
{
var clientProfile = db.ClientProfiles.FirstOrDefault(f => f.ClientProfileID.Equals(id));
if (clientProfile != null)
{
db.Entry(clientProfile).State = EntityState.Deleted;
}
db.SaveChangesAsync();
}
public async Task <IActionResult> PutPhoto(int id, Photo photo)
{
if (id != photo.Id)
{
return(BadRequest());
}
_context.Entry(photo).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!PhotoExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(NoContent());
}
public async Task <IActionResult> Edit(int id, AlbumsViewModel model)
{
if (id != model.Album.Id)
{
return(NotFound());
}
if (ModelState.IsValid)
{
try
{
await UpdateAlbumPhotos(model.Album, model.Photos);
_context.Entry(model.Album).State = EntityState.Modified;
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!AlbumExists(model.Album.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToAction(nameof(Index)));
}
return(View(model));
}
public ActionResult Edit([Bind(Include = "Id,Name,Price,CategoryId")] Photo photo)
{
if (ModelState.IsValid)
{
db.Entry(photo).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
return(View(photo));
}
public ActionResult Edit([Bind(Include = "Id,CartId,PhotoId")] CartItem cartitem)
{
if (ModelState.IsValid)
{
db.Entry(cartitem).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.PhotoId = new SelectList(db.Photos, "Id", "Name", cartitem.PhotoId);
return(View(cartitem));
}
public void UpdatePhoto(Photo Photo)
{
_dbContext.Entry(Photo).State = EntityState.Modified;
Save();
}
static void Main(string[] args)
{
//Problema 1
using (var context = new ModelSelfReferences())
{
SelfReference selfReference = new SelfReference()
{
Name = "TRK"
};
context.SelfReferences.Add(selfReference);
context.SaveChanges();
var items = context.SelfReferences;
foreach (var x in items)
{
Console.WriteLine(x.Name);
}
}
//Problema 2
using (var context = new ProductContext())
{
var product = new Product
{
SKU = 150,
Description = "Expandable Hydration Pack",
Price = 19.97M,
ImageURL = "/pack147.jpg"
};
context.Products.Add(product);
product = new Product
{
SKU = 181,
Description = "Rugged Ranger Duffel Bag",
Price = 39.97M,
ImageURL = "/pack178.jpg"
};
context.Products.Add(product);
product = new Product
{
SKU = 189,
Description = "Range Field Pack",
Price = 98.97M,
ImageURL = "/noimage.jp"
};
context.Products.Add(product);
product = new Product
{
SKU = 205,
Description = "Small Deployment Back Pack",
Price = 29.97M,
ImageURL = "/pack202.jpg"
};
context.Products.Add(product);
context.SaveChanges();
}
using (var context = new ProductContext())
{
foreach (var p in context.Products)
{
Console.WriteLine("{0} {1} {2} {3}", p.SKU, p.Description,
p.Price.ToString("C"), p.ImageURL);
}
}
//Problema 3
byte[] thumbBits = new byte[100];
byte[] fullBits = new byte[2000];
using (var context = new PhotoContext())
{
var photo = new Photograph
{
Title = "No more corona beer",
ThumbnailBits = thumbBits
};
var fullImage = new PhotographFullImage
{
HighResolutionBits = fullBits
};
photo.PhotographFullImage = fullImage;
context.Photographs.Add(photo);
context.SaveChanges();
}
using (var context = new PhotoContext())
{
foreach (var photo in context.Photographs)
{
Console.WriteLine("Photo: {0}, ThumbnailSize {1} bytes",
photo.Title, photo.ThumbnailBits.Length);
// explicitly load the "expensive" entity,
context.Entry(photo)
.Reference(p => p.PhotographFullImage).Load();
Console.WriteLine("Full Image Size: {0} bytes",
photo.PhotographFullImage.HighResolutionBits.Length);
}
}
//Problema 4
using (var context = new BusinessContext())
{
var business = new Business
{
Name = "Corner Dry Cleaning",
LicenseNumber = "100x1"
};
context.Businesses.Add(business);
var retail = new Retail
{
Name = "Shop and Save",
LicenseNumber = "200C",
Address = "101 Main",
City = "Anytown",
State = "TX",
ZIPCode = "76106"
};
context.Businesses.Add(retail);
var web = new eCommerce
{
Name = "BuyNow.com",
LicenseNumber = "300AB",
URL = "www.buynow.com"
};
context.Businesses.Add(web);
context.SaveChanges();
}
using (var context = new BusinessContext())
{
Console.WriteLine("\n--- All Businesses ---");
foreach (var b in context.Businesses)
{
Console.WriteLine("{0} (#{1})", b.Name, b.LicenseNumber);
}
Console.WriteLine("\n--- Retail Businesses ---");
foreach (var r in context.Businesses.OfType <Retail>())
{
Console.WriteLine("{0} (#{1})", r.Name, r.LicenseNumber);
Console.WriteLine("{0}", r.Address);
Console.WriteLine("{0}, {1} {2}", r.City, r.State, r.ZIPCode);
}
Console.WriteLine("\n--- eCommerce Businesses ---");
foreach (var e in context.Businesses.OfType <eCommerce>())
{
Console.WriteLine("{0} (#{1})", e.Name, e.LicenseNumber);
Console.WriteLine("Online address is: {0}", e.URL);
}
}
//Problema 5
using (var context = new EmployeeContext())
{
var fte = new FullTimeEmployee
{
FirstName = "Jane",
LastName =
"Doe",
Salary = 71500M
};
context.Employees.Add(fte);
fte = new FullTimeEmployee
{
FirstName = "John",
LastName = "Smith",
Salary = 62500M
};
context.Employees.Add(fte);
var hourly = new HourlyEmployee
{
FirstName = "Tom",
LastName =
"Jones",
Wage = 8.75M
};
context.Employees.Add(hourly);
context.SaveChanges();
}
using (var context = new EmployeeContext())
{
Console.WriteLine("--- All Employees ---");
foreach (var emp in context.Employees)
{
bool fullTime = emp is HourlyEmployee ? false : true;
Console.WriteLine("{0} {1} ({2})", emp.FirstName, emp.LastName,
fullTime ? "Full Time" : "Hourly");
}
Console.WriteLine("--- Full Time ---");
foreach (var fte in context.Employees.OfType <FullTimeEmployee>())
{
Console.WriteLine("{0} {1}", fte.FirstName, fte.LastName);
}
Console.WriteLine("--- Hourly ---");
foreach (var hourly in context.Employees.OfType <HourlyEmployee>())
{
Console.WriteLine("{0} {1}", hourly.FirstName,
hourly.LastName);
}
}
}