/**
* Updates Book, Magazine, MusicCD is gathered under 1 function as they all derived from ProductClass
*/
public bool updateProduct(ProductClass product)
{
DatabaseHelperClass dbHelper = DatabaseHelperClass.Instance;
bool affected = dbHelper.updateAProductAtDB(product);
return(affected);
}
} //singleton pattern
/**
* Addnew Book, Magazine, MusicCD is gathered under 1 function as they all derived from ProductClass
*/
public bool addNewProduct(ProductClass product)
{
DatabaseHelperClass dbHelper = DatabaseHelperClass.Instance;
bool affected = dbHelper.addAProductToDB(product);
return(affected);
}
public bool updateAProductAtDB(ProductClass product)
{
try
{
SqlConnection connection = dbHelper.getConnection();
SqlCommand command = null;
if (product.GetType() == typeof(BookHouseOOP.BookClass))
{
command = new SqlCommand("UPDATE BookTable SET name=@name,price=@price,stock=@stock,isbn=@isbn,author=@author,publisher=@publisher,page=@page,cover_page_picture=@cover_page_picture WHERE id=@id", connection);
command.Parameters.AddWithValue("@id", ((BookClass)product).id);
command.Parameters.AddWithValue("@name", ((BookClass)product).name);
command.Parameters.AddWithValue("@price", ((BookClass)product).price);
command.Parameters.AddWithValue("@stock", ((BookClass)product).stock);
command.Parameters.AddWithValue("@isbn", ((BookClass)product).isbn);
command.Parameters.AddWithValue("@author", ((BookClass)product).author);
command.Parameters.AddWithValue("@publisher", ((BookClass)product).publisher);
command.Parameters.AddWithValue("@page", ((BookClass)product).page);
command.Parameters.AddWithValue("@cover_page_picture", ((BookClass)product).cover_page_picture);
}
else if (product.GetType() == typeof(BookHouseOOP.MagazineClass))
{
command = new SqlCommand("UPDATE MagazineTable SET name=@name,price=@price,stock=@stock,issue=@issue,type=@type,cover_page_picture=@cover_page_picture WHERE id=@id", connection);
command.Parameters.AddWithValue("@id", ((MagazineClass)product).id);
command.Parameters.AddWithValue("@name", ((MagazineClass)product).name);
command.Parameters.AddWithValue("@price", ((MagazineClass)product).price);
command.Parameters.AddWithValue("@stock", ((MagazineClass)product).stock);
command.Parameters.AddWithValue("@issue", ((MagazineClass)product).issue);
command.Parameters.AddWithValue("@type", ((MagazineClass)product).magazineType);
command.Parameters.AddWithValue("@cover_page_picture", ((MagazineClass)product).cover_page_picture);
}
else if (product.GetType() == typeof(BookHouseOOP.MusicCDsClass))
{
command = new SqlCommand("UPDATE MusicCDsTable SET name=@name,price=@price,stock=@stock,singer=@singer,type=@type,picture=@picture WHERE id=@id", connection);
command.Parameters.AddWithValue("@id", ((MusicCDsClass)product).id);
command.Parameters.AddWithValue("@name", ((MusicCDsClass)product).name);
command.Parameters.AddWithValue("@price", ((MusicCDsClass)product).price);
command.Parameters.AddWithValue("@stock", ((MusicCDsClass)product).stock);
command.Parameters.AddWithValue("@singer", ((MusicCDsClass)product).singer);
command.Parameters.AddWithValue("@type", ((MusicCDsClass)product).type);
command.Parameters.AddWithValue("@picture", ((MusicCDsClass)product).cover_page_picture);
}
int affected = command.ExecuteNonQuery();
if (affected > 0)
{
return(true);
}
return(false);
}
catch (Exception e)
{
FileWriterClass.WriteFile(AppConstants.EXCEPTION_LOG_FILE_LOCATION, "Exception at updateAProductAtDB function" + e.Message);
Console.WriteLine("Click {0}", e.Message);
return(false);
}
}
/**
* @brief Default Constructor
* Constructs the object with default parameters
* @param ProductClass product
* @param int quantity
*/
public ItemToPurchaseClass(ProductClass product, int quantity)
{
this.product = product;
this.quantity = quantity;
}