private void checkOutButton_Click(object sender, EventArgs e)
{
try
{
//Declare variables
int isbn = 0, empID = 0, memID = 0;
//Set int values
isbn = SetISBN(isbnTextbox);
if (isbn != 0)
{
empID = SetEmployeeID(employeeIDTextbox);
if (empID != 0)
{
memID = SetMemberID(memberIDTextbox);
}
}
//Create table adapters for data validation
LibraryDataSetTableAdapters.TransactionsTableAdapter transactionsTableAdapter1;
transactionsTableAdapter1 = new LibraryDataSetTableAdapters.TransactionsTableAdapter();
LibraryDataSetTableAdapters.BooksTableAdapter booksTableAdapter1;
booksTableAdapter1 = new LibraryDataSetTableAdapters.BooksTableAdapter();
//If the book is checked out it will ask for a book that is not and vice versa
if (booksTableAdapter1.AvailabilityISBN(isbn) == true)
{
MessageBox.Show("Please bring your book back within three weeks." + "\n" +
"Thank You.");
transactionsTableAdapter1.InsertQuery(isbn, empID, memID);
booksTableAdapter1.UpdateQueryCheckOut(isbn, isbn);
}
else
{
MessageBox.Show("Please enter a valid checked in ISBN.");
}
}
//Catches incorrectly formated input
catch (FormatException)
{
MessageBox.Show("A format exception has occured.", "Entry error.");
}
//Catches overflow values
catch (OverflowException)
{
MessageBox.Show("An overflow exception has occured.", "Entry error.");
}
//Catches all other exceptions
catch (Exception ex)
{
MessageBox.Show(ex.Message + "\n\n" +
ex.GetType().ToString() + "\n" +
ex.StackTrace, "Exception");
}
}
/*
* FOCUS LEAVE EVENTS
*/
//Checks if the ISBN exists after the user leaves the ISBN textbox
private void isbnTextbox_Leave(object sender, EventArgs e)
{
//Declare variables
int isbn = 0;
isbn = SetISBN(isbnTextbox);
//Create table adapters needed to verify if ISBN exists
LibraryDataSetTableAdapters.BooksTableAdapter booksTableAdapter1;
booksTableAdapter1 = new LibraryDataSetTableAdapters.BooksTableAdapter();
//Determines if the ISBN exists
if (isbn != 0)
{
if (booksTableAdapter1.ExistingISBN(isbn) == isbn)
{
}
else
{
MessageBox.Show("Please enter an existing ISBN.");
isbnTextbox.Focus();
}
}
}
