//Add a record to the file, if the ISBN already exists, don't add it.
private void btnAddNew_Click(object sender, EventArgs e)
{
UpdateDate();
string[] info = getInfo();
if (validateInfo())
{
DialogResult dr = MessageBox.Show("Are you sure you'd like to add the book displayed to the inventory?",
"Add Book", MessageBoxButtons.YesNo);
if (dr == DialogResult.Yes)
{
Book addBook = new Book(info);
if (!fh.bookSearch(ref addBook, info[0]))
{
if (fh.addBook(addBook.ToString()))
{
lastAction = 'a';
MessageBox.Show("The book has been succesfully added.", "Success!");
}
else
{
MessageBox.Show("Error adding book", "File Error");
return;
}
}
else
{
MessageBox.Show("Book with ISBN: " + info[0] + " already exists. Recheck your info.", "Duplicate Record");
return;
}
}
else
{
MessageBox.Show("Action canceled.", "Canceled");
return;
}
}
}
//Handles searching the book file for the specified book, as well as deleting/updating files.
//Flags are "delete"/"update". Add is handled with a boolean and then calling the addBook method.
//Doing it this way prevents having to re-search/scan the file for deleting/updating.
//While you could do delete/update in similar ways it revolves around constantly keeping track
//of the Reader/Writer which I feel is more difficult to follow than this method.
//However, this method does kind of do a lot and is a pain to read through.
public bool bookSearch(ref Book book, string isbn, string flag = "")
{
sw = new StreamWriter(tempFile);
sr = new StreamReader(sourceFile);
currentBook = book; //Store original book passed
string line;
bool found = false;
flag.ToLower();
while ((line = sr.ReadLine()) != null)
{
string[] bookInfo = line.Split('|');
//ISBN ID Validatio(Two groups of 3 digits delimited by hyphen)
if (Book.ValidateISBNFormat(bookInfo[0]))
{
if (bookInfo[0] == isbn && flag == "") //Just a search, return the book that was being looked for/dont modify file
{
book = new Book(bookInfo);
found = true;
sw.Close();
sr.Close();
return(found);
}
else if (bookInfo[0] == isbn && flag == "delete") //Record found, delete it? If yes, just skip writing.
{
Book deleteBook = new Book(bookInfo);
DialogResult dr = MessageBox.Show("Book with ISBN: " + isbn + " found.\r\n" +
String.Join(Environment.NewLine, deleteBook.BookInfo()) + "\r\nIs this the book you wish to delete?",
"Delete Book", MessageBoxButtons.YesNo);
if (dr == DialogResult.Yes)
{
found = true;
}
}
else if (bookInfo[0] == isbn && flag == "update") //Update a record
{
sw.WriteLine(currentBook.ToString());
found = true;
}
else //This book doesn't match the book being searched for, safe to just write it.
{
if (!string.IsNullOrWhiteSpace(line))
{
sw.WriteLine(line);
}
}
}
else //What to do if we have invalid entry in txt file/data corruption
{
if (!string.IsNullOrEmpty(line))
{
MessageBox.Show("Inventory file has issue at ISBN: " + bookInfo[0],
"Data Corruption");//Move to form code probably
return(false);
}
}
}
sr.Close();
sw.Close();
return(found);
}
public void ViewBooks(List <Book> books)
{
int sno = 1;
Console.BackgroundColor = ConsoleColor.White;
Console.ForegroundColor = ConsoleColor.DarkBlue;
Console.WriteLine(" Id\tPrice\t\tName\t\t\t\t\t ");
Console.WriteLine("-----------------------------------------------------------------");
Console.BackgroundColor = ConsoleColor.Black;
Console.ForegroundColor = ConsoleColor.White;
foreach (Book bookItem in books)
{
if (Convert.ToInt32(bookItem.GetPrice()) == 0)
{
Console.WriteLine(" " + sno + "\t" + "Free" + "\t\t" + bookItem.GetName());
}
else
{
Console.WriteLine(" " + sno + "\t" + bookItem.GetPrice() + "\t\t" + bookItem.GetName());
}
Console.WriteLine("-----------------------------------------------------------------");
sno++;
}
while (true)
{
Console.Write("Enter Id to View Book or ");
Console.BackgroundColor = ConsoleColor.DarkBlue;
Console.WriteLine("'Press 0 to go back on main menu'");
Console.ResetColor();
try
{
int id = Convert.ToInt32(Console.ReadLine());
if (id == 0)
{
Console.Clear();
ShowMenu();
SelectOption();
break;
}
else
{
Console.BackgroundColor = ConsoleColor.White;
Console.ForegroundColor = ConsoleColor.DarkBlue;
Console.WriteLine("\t\t\tBook Information\t\t\t ");
Console.WriteLine("-----------------------------------------------------------------");
Console.ResetColor();
int bookId = --id;
Book _book = books[bookId];
Console.WriteLine(_book.ToString());
Console.BackgroundColor = ConsoleColor.DarkYellow;
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("\n Press 1 to add book to cart or 2 to view author(s) details");
Console.ResetColor();
int opt = Convert.ToInt32(Console.ReadLine());
if (opt == 1)
{
try
{
Console.Write("Enter Quantity : ");
int qty = Convert.ToInt32(Console.ReadLine());
if (qty <= 0)
{
throw new Exception();
}
AddItem(_book, qty);
Console.WriteLine("\nYou have (" + user.GetShoppingCartBooks().Length + ") Items in your cart.\n");
}
catch (Exception)
{
Console.WriteLine("Invalid qty");
}
}
else
{
ViewAuthors(_book.GetAuthors());
}
}
}
catch (Exception)
{
Console.WriteLine("Invalid Input...Try again!!");
}
}
}