public void ReinitialiseObjects()
{
bookInfo = null;
bookCatalogue = null;
loanTrans = null;
transDetail = null;
bookID = 0;
transID = 0;
bookStatus = "";
}
public void DefineBookObjects()
{
bookInfo = context.BookInfoes.Where(x => x.BookID == bookID).First();
bookCatalogue = context.BookCatalogues.Where(x => x.ISBN == bookInfo.ISBN).First();
}
private void buttonLoan_Click(object sender, EventArgs e)
{
using (TransactionScope loanTransScope = new TransactionScope())
{
int currentTransID = context.LoanTrans.OrderByDescending(x => x.TransID).First().TransID;
try
{
if (IsOverLoanLimit(availableLimit, booksToLoan.Count()) == true)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Number of Books has exceeded borrowing limit.";
return;
}
if (IsBookAlreadyOut(context.BookInfoes.Where(x => x.BookID == bookID).Select(x => x.Status).First().ToString()) == true)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Invalid Request. Book is already on loan.";
return;
}
}
catch (InvalidOperationException)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Invalid Operation!";
}
try
{
Member memberinfo = context.Members.Where(x => x.MemberID == memberID).First();
}
catch (InvalidOperationException)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Invalid operation. Please make sure enter a valid Member ID and Book ID!";
return;
}
int createTransID = ++currentTransID;
//need to have some function to bind bookinfo to the database
foreach (BookInfo i in booksToLoan)
{
BookInfo bookPersistence = context.BookInfoes.Where(x => x.BookID == i.BookID).First();
bookPersistence.Status = "OUT";
BookCatalogue bookInvenPersis = context.BookCatalogues.Where(x => x.ISBN == bookPersistence.ISBN).First();
bookInvenPersis.StockInLibrary = --bookInvenPersis.StockInLibrary;
bookInvenPersis.NumberOnLoan = ++bookInvenPersis.NumberOnLoan;
}
//create new loan transaction
LoanTran newTrans = new LoanTran();
newTrans.TransID = createTransID;
newTrans.MemberID = memberID;
newTrans.NumberOfBooks = booksToLoan.Count();
context.LoanTrans.Add(newTrans);
//Create new transDetails information
foreach (BookInfo i in booksToLoan)
{
int newSn = int.Parse(context.TransDetails.OrderByDescending(x => x.Sn).OrderByDescending(x => x.Sn).First().Sn.ToString());
TransDetail transDetails = new TransDetail();
transDetails.Sn = ++newSn;
transDetails.BookID = i.BookID;
try
{
if (dateTimeLoanDatePicker.Value.Date > DateTime.Today || dateTimeDueDatePicker.Value < dateTimeLoanDatePicker.Value || dateTimeDueDatePicker.Value.Date < DateTime.Today)
{
throw new LoanException();
}
}
catch (LoanException)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Invalid Loan or Due Date";
return;
}
transDetails.LoanDate = dateTimeLoanDatePicker.Value.Date;
transDetails.DueDate = dateTimeDueDatePicker.Value.Date;
transDetails.TransID = currentTransID;
context.TransDetails.Add(transDetails);
context.SaveChanges();
}
context.SaveChanges();
((FormMain)this.MdiParent).SetToolStripLabelText = "Loan Processed Succesfully!";
booksToLoan.Clear();
memberInfoClear();
clearBookInfo();
}
}
//create new entry in BookCatalogue and BookInfo tables
private void btnSave_Click(object sender, EventArgs e)
{
using (TransactionScope addBookTransScope = new TransactionScope())
{
((FormMain)this.MdiParent).SetToolStripLabelText = "...";
try
{
int totalStock = Convert.ToInt16(txtTotalStock.Text);
}
catch (FormatException)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Invalid book number entered in the stock field.";
return;
}
if (Math.Abs(Convert.ToInt16(txtTotalStock.Text)) > 100)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Too many books added. Maximum allowable is 100 books per transaction.";
return;
}
if (dateTimePickerPub.Value > DateTime.Today)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Year published cannot be in the future";
return;
}
BookCatalogue bookCatalogue = new BookCatalogue();
try
{
bookCatalogue.ISBN = Convert.ToDouble(txtISBN.Text);
}
catch (FormatException)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Invalid ISBN String Format.";
return;
}
double ISBNinput;
{
if (Convert.ToDouble(txtISBN.Text) > 1000000000000)
{
ISBNinput = Convert.ToDouble(txtISBN.Text);
if (doesISBNexist(ISBNinput) == true)
{
((FormMain)this.MdiParent).SetToolStripLabelText = "ISBN already exists. Please use 'Update Book' function to update book information.";
return;
}
else
{
bookCatalogue.ISBN = ISBNinput;
}
}
else
{
InvalidLabel(lblISBN);
return;
}
}
bookCatalogue.BookTitle = txtTitle.Text;
bookCatalogue.Author = txtauthor.Text;
bookCatalogue.YearOfPublication = dateTimePickerPub.Value;
bookCatalogue.Publisher = txtPub.Text;
bookCatalogue.CallNumber = txtCall.Text;
bookCatalogue.ShelfNumber = txtShelf.Text;
bookCatalogue.Description = txtdesc.Text;
bookCatalogue.StockInLibrary = Math.Abs(Convert.ToInt16(txtTotalStock.Text));
bookCatalogue.Subject = cbosub.Text;
bookCatalogue.Type = cbotype.Text;
bookCatalogue.NumberOnLoan = 0;
if (string.IsNullOrEmpty(txtISBN.Text) ||
(string.IsNullOrEmpty(txtTitle.Text) ||
(string.IsNullOrEmpty(txtauthor.Text) ||
(string.IsNullOrEmpty(txtTotalStock.Text)))))
{
((FormMain)this.MdiParent).SetToolStripLabelText = "Please enter ISBN, Title and Author";
return;
}
context.BookCatalogues.Add(bookCatalogue);
context.SaveChanges();
for (int i = 0; i <= Convert.ToInt16(txtTotalStock.Text); i++)
{
double bookIDnew = context.BookInfoes.OrderByDescending(x => x.BookID).First().BookID;
BookInfo bookInfo = new BookInfo();
bookInfo.BookID = ++bookIDnew;
bookInfo.ISBN = Convert.ToDouble(txtISBN.Text);
bookInfo.BookTitle = txtTitle.Text;
bookInfo.Remarks = "";
bookInfo.Status = "IN";
context.BookInfoes.Add(bookInfo);
context.SaveChanges();
}
context.SaveChanges();
MessageBox.Show("New Book has been saved!");
this.Close();
}
}
private void btnUpdate_Click(object sender, EventArgs e)
{
using (TransactionScope updateBookTransScope = new TransactionScope())
{
int booksNewStock;
try
{
booksNewStock = Math.Abs(Convert.ToInt16(txtNewStock.Text));
}
catch (FormatException)
{
MessageBox.Show("Error! Please enter a valid number in the New Stock field.");
return;
}
if (booksNewStock > 100)
{
MessageBox.Show("Too many books added. Maximum allowable is 100 books per transaction.");
return;
}
BookCatalogue bkCatalogue = context.BookCatalogues.Where(x => x.ISBN == inputISBN).First();
bkCatalogue.BookTitle = txtTitle.Text;
bkCatalogue.Author = txtauthor.Text;
bkCatalogue.YearOfPublication = dateTimePickerPub.Value;
bkCatalogue.Publisher = txtPub.Text;
bkCatalogue.Description = txtDesc.Text;
bkCatalogue.Type = cbotType.Text;
bkCatalogue.Subject = cboSub.Text;
bkCatalogue.CallNumber = txtCall.Text;
bkCatalogue.ShelfNumber = txtShelf.Text;
try
{
bkCatalogue.StockInLibrary = Convert.ToInt16(txtTotalStock.Text) + booksNewStock;
}
catch (Exception ex)
{
if (ex is FormatException)
{
MessageBox.Show("Invalid Character entered. Please enter a number for number of New Stock arrived");
return;
}
else if (ex is OverflowException)
{
MessageBox.Show("Invalid number entry entered. Maximum allowedable number is 37000 books");
return;
}
}
if (booksNewStock > 0)
{
for (int i = 0; i < booksNewStock - 1; i++)
{
double bookIDnew = double.Parse(context.BookInfoes.OrderByDescending(x => x.BookID).First().BookID.ToString());
BookInfo bookInfo = new BookInfo();
bookInfo.BookID = ++bookIDnew;
bookInfo.BookTitle = txtTitle.Text;
bookInfo.ISBN = Convert.ToDouble(txtISBN.Text);
bookInfo.BookTitle = txtTitle.Text;
bookInfo.Remarks = "";
bookInfo.Status = "IN";
context.BookInfoes.Add(bookInfo);
context.SaveChanges();
}
}
context.SaveChanges();
MessageBox.Show("Book updated successfully!");
this.Close();
}
}
