// Click event handler for the update book button.
// Reveal rest of form if the book has been found
// on file. If the book is found on file then
// show the rest of the form that allows the user
// to udpate data on the book. If the book does
// not exist on file then tell the user and reset
// the isbn text boxes and rewind the files.
private void btnUpdateBook_Click(object sender, EventArgs e)
{
lblEnterBookData.Text = "Enter Data To Update Book:";
makeVisible();
btnAddBook.Enabled = false;
btnDeleteBook.Enabled = false;
btnUpdateBook.Enabled = false;
try
{
bool bookMatch = false;
string bookStr = Globals.BookStore.findAndSaveBook
(txtISBNLeft.Text + "-" + txtISBNRight.Text, out bookMatch);
String[] bookStrArr = bookStr.Split('*');
txtDataISBN.Text = bookStrArr[0];
txtDataTitle.Text = bookStrArr[1];
txtDataAuthor.Text = bookStrArr[2];
txtDataPrice.Text = bookStrArr[3];
txtDataOnHand.Text = bookStrArr[4];
txtDataDate.Text = bookStrArr[5];
}
catch
{
MessageBox.Show("The inputted ISBN does not exist on file...",
"Book not found.");
BookStoreClass.currentBookFile.rewindFile();
BookStoreClass.updatedBookFile.rewindFile();
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
}
// Go button click event handler method.
// Gets user input from text box and checks if it is valid length.
// Also will check if the pin matches the employee id.
private void btnGo_Click(object sender, EventArgs e)
{
try
{
int pinLength = txtPin.Text.Length;
int inputPin = Convert.ToInt32(txtPin.Text);
if (pinLength == 4 && Globals.BookStore.EmployeeList.verifyPin(inputPin) == true)
{
Globals.BookStore.EmployeeList.updateEmployeeObject();
Globals.BookStore.writeEntireEmployeeList();
BookStoreClass.currentEmployeeFile.closeFile();
BookStoreClass.updatedEmployeeFile.closeFile();
MessageBox.Show("You have logged in to the bookstore inventory.", "Welcome");
// Hide pin form, load third form.
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
else
{
numAttempts++;
MessageBox.Show("Invalid pin.");
txtPin.Text = "";
txtPin.Focus();
}
}
catch
{
numAttempts++;
MessageBox.Show("Invalid pin.");
}
// Only allow 3 wrong tries.
if (numAttempts == 3)
{
MessageBox.Show("Too many attempts.", "Closing");
this.Close();
}
}
// Add button event handler method.
// In order to add a book to the file, it must first be
// checked to make sure it doesn't already exist.
// If it doesn't already exist then disable the
// button options and put the inputted ISBN number
// into the data ISBN text box.
private void btnAddBook_Click(object sender, EventArgs e)
{
if (Globals.BookStore.checkForDuplicateRecord
(txtISBNLeft.Text + "-" + txtISBNRight.Text) == true)
{
MessageBox.Show("Cannot add this book" +
"because it already exists on file...", "Error.");
BookStoreClass.currentBookFile.rewindFile();
BookStoreClass.updatedBookFile.rewindFile();
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
else
{
lblEnterBookData.Text = "Enter Data To Add A Book:";
makeVisible();
btnUpdateBook.Enabled = false;
btnDeleteBook.Enabled = false;
btnAddBook.Enabled = false;
txtDataISBN.Text = txtISBNLeft.Text + "-" + txtISBNRight.Text;
}
}
// Click event handler method for the delete book button.
// Checks if book exists on file. If it does then display
// the data in the text boxes. If the inputted isbn does not
// exist on file then tell the user and reset
// the isbn text boxes and rewind the files.
private void btnDeleteBook_Click(object sender, EventArgs e)
{
try
{
lblEnterBookData.Text = "Data For Book To Delete:";
makeVisible();
btnAddBook.Enabled = false;
btnUpdateBook.Enabled = false;
btnDeleteBook.Enabled = false;
bool bookMatch = false;
string bookString = Globals.BookStore.findAndSaveBook
(txtISBNLeft.Text + "-" + txtISBNRight.Text, out bookMatch);
String[] BookArray = bookString.Split('*');
txtDataISBN.Text = BookArray[0];
txtDataTitle.Text = BookArray[1];
txtDataAuthor.Text = BookArray[2];
txtDataPrice.Text = BookArray[3];
txtDataOnHand.Text = BookArray[4];
txtDataDate.Text = BookArray[5];
txtDataISBN.Enabled = false;
txtDataTitle.Enabled = false;
txtDataAuthor.Enabled = false;
txtDataPrice.Enabled = false;
txtDataOnHand.Enabled = false;
txtDataDate.Enabled = false;
}
catch
{
MessageBox.Show("This book does not exist on file...", "Invalid.");
BookStoreClass.currentBookFile.rewindFile();
BookStoreClass.updatedBookFile.rewindFile();
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
}
// Done button to be clicked on after the user
// is finished with the data input text boxes.
// If-else blocks are to be used to check which
// button the user has clicked on. So basically
// the done button will handle each of the 3
// actions. It will ask the user if they are sure
// they want to go through will the transaction and
// provide a yes or no button. If the user clicks on
// the yes button then the transaction will be done
// and the program will close. If they choose no then
// the third form will basically be reset and loaded
// again.
private void btnDone_Click(object sender, EventArgs e)
{
// Case 1: update book button is clicked.
if (lblEnterBookData.Text == "Enter Data To Update Book:")
{
MessageBoxButtons btnsYesNo_1 = MessageBoxButtons.YesNo;
DialogResult finalResult_1;
finalResult_1 = MessageBox.Show("Are you sure you want to update the book" +
"with this data?", "User Validation.", btnsYesNo_1);
if (finalResult_1 == System.Windows.Forms.DialogResult.Yes)
{
Globals.BookStore.writeOneRecord(txtDataISBN.Text + "*"
+ txtDataTitle.Text + "*" + txtDataAuthor.Text + "*"
+ txtDataPrice.Text + "*" + txtDataOnHand.Text + "*"
+ txtDataDate.Text);
Globals.BookStore.copyRemainingRecords();
BookStoreClass.currentBookFile.closeFile();
BookStoreClass.updatedBookFile.closeFile();
this.Close();
}
if (finalResult_1 == System.Windows.Forms.DialogResult.No)
{
MessageBox.Show("Enter a new ISBN...", "OK.");
BookStoreClass.currentBookFile.rewindFile();
BookStoreClass.updatedBookFile.rewindFile();
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
}
// Case 2: delete book button is clicked.
else if (lblEnterBookData.Text == "Data For Book To Delete:")
{
MessageBoxButtons btnsYesNo_2 = MessageBoxButtons.YesNo;
DialogResult finalResult_2;
finalResult_2 = MessageBox.Show("Are you sure you want to delete the book" +
"with this data?", "User Validation.", btnsYesNo_2);
if (finalResult_2 == System.Windows.Forms.DialogResult.Yes)
{
Globals.BookStore.copyRemainingRecords();
BookStoreClass.currentBookFile.closeFile();
BookStoreClass.updatedBookFile.closeFile();
this.Close();
}
if (finalResult_2 == System.Windows.Forms.DialogResult.No)
{
MessageBox.Show("Enter a new ISBN...", "OK.");
BookStoreClass.currentBookFile.rewindFile();
BookStoreClass.updatedBookFile.rewindFile();
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
}
// Case 3: add book button is clicked.
else if (lblEnterBookData.Text == "Enter Data To Add A Book:")
{
MessageBoxButtons btnsYesNo_3 = MessageBoxButtons.YesNo;
DialogResult finalResult_3;
finalResult_3 = MessageBox.Show("Are you sure you want to add the book" +
"with this data?", "User Validation.", btnsYesNo_3);
if (finalResult_3 == System.Windows.Forms.DialogResult.Yes)
{
Globals.BookStore.writeOneRecord
(txtDataISBN.Text + "*" + txtDataTitle.Text + "*"
+ txtDataAuthor.Text + "*" + txtDataPrice.Text + "*"
+ txtDataOnHand.Text + "*" + txtDataDate.Text);
Globals.BookStore.copyRemainingRecords();
BookStoreClass.currentBookFile.closeFile();
BookStoreClass.updatedBookFile.closeFile();
this.Close();
}
if (finalResult_3 == System.Windows.Forms.DialogResult.No)
{
MessageBox.Show("Enter a new ISBN...", "OK.");
BookStoreClass.currentBookFile.rewindFile();
BookStoreClass.updatedBookFile.rewindFile();
this.Hide();
frmBook book = new frmBook();
book.ShowDialog();
}
}
}
