// method deals with finding a book
private void FindBookButton_Click(object sender, EventArgs e)
{
string bookTitle = SearchBookIDTextBox.Text;
// Checks for empty values
if (bookTitle != null && bookTitle != "")
{
try
{
LibraryDBClassProject.LibraryManagement libDataclass = new LibraryDBClassProject.LibraryManagement();
// Checks whether the record being available in the database
if (libDataclass.getSearchBooks(bookTitle).Rows.Count != 0)
{
BooksDataGridView.DataSource = libDataclass.getSearchBooks(bookTitle);
}
else
{
ErrorLabel.Text = " Please enter a valid Book Id to search";
}
}
catch (Exception ex)
{
ErrorLabel.Text = ex.Message + " An Error Occurred";
}
}
else
{
ErrorLabel.Text = "Book Title can not be blank";
}
}
//This method deals with issuing book
private void IssueBookButton_Click(object sender, EventArgs e)
{
// Checks for empty values
if (BookIDTextBox.Text != "" && StudentIDTextBox.Text != "")
{
int bookId;
int studentID;
// Checks whether input is integer
if (int.TryParse(BookIDTextBox.Text, out bookId) && int.TryParse(StudentIDTextBox.Text, out studentID))
{
DateTimePicker1.MinDate = DateTimePicker1.MaxDate = DateTime.Now;
String date = DateTimePicker1.Text;
LibraryDBClassProject.LibraryManagement libDataclass = new LibraryDBClassProject.LibraryManagement();
// Checks whether the record being inserted in the database
if (libDataclass.getSearchBookID(bookId).Rows.Count != 0)
{
if (libDataclass.checkBookStatus(bookId).Rows.Count != 0)
{
int x = libDataclass.issueBook(bookId, studentID, date);
if (x != 0)
{
ErrorLabel.Text = " Book Issued Successfully";
}
else
{
ErrorLabel.Text = " Invalid inputs. Please provide a valid Student ID.";
}
}
else
{
ErrorLabel.Text = " Book is already issued.";
}
}
else
{
ErrorLabel.Text = " Book does not exist";
}
}
else
{
ErrorLabel.Text = " Input values should be numeric. Please provide numeric inputs.";
}
}
else
{
ErrorLabel.Text = " Input values can not be blank. Please provide inputs.";
}
}
// method deals with displaying issued books to students
private void SearchIssuedBooksButton_Click(object sender, EventArgs e)
{
int studentId;
// Checks for empty values
if (StudentIdTextBox.Text != "" && StudentIdTextBox.Text != null)
{
// Checks whether input is integer
if (int.TryParse(StudentIdTextBox.Text, out studentId))
{
try
{
LibraryDBClassProject.LibraryManagement libDataclass = new LibraryDBClassProject.LibraryManagement();
// Checks whether the record being inserted in the database
if (libDataclass.getSearchStudentID(studentId).Rows.Count != 0)
{
if (libDataclass.getSearchIssuedBooks(studentId).Rows.Count != 0)
{
ReturnBooksDataGridView.DataSource = libDataclass.getSearchIssuedBooks(studentId);
ErrorLabel.Text = libDataclass.DBError;
}
else
{
ErrorLabel.Text = "No books has been issued.";
ReturnBooksDataGridView.ClearSelection();
}
}
else
{
ErrorLabel.Text = "Student ID doesnt not exist.";
ReturnBooksDataGridView.ClearSelection();
}
}
catch (Exception ex)
{
ErrorLabel.Text = ex.Message + " An Error Occurred";
}
}
else
{
ErrorLabel.Text = "Student ID must be numeric. Please enter a valid ID";
ReturnBooksDataGridView.ClearSelection();
}
}
else
{
ErrorLabel.Text = "Student ID can not be blank. Please enter a valid ID";
ReturnBooksDataGridView.ClearSelection();
}
}
// method deals with returning books
private void ReturnBookButton_Click(object sender, EventArgs e)
{
DateTimePickerReturn.MinDate = DateTimePickerReturn.MaxDate = DateTime.Now;
string returnDate = DateTimePickerReturn.Text;
int bookID;
// Checks for empty values
if (ReturnIDTextBox.Text != "" && ReturnIDTextBox.Text != null)
{
// Checks whether input is integer
if (int.TryParse(ReturnIDTextBox.Text, out bookID))
{
LibraryDBClassProject.LibraryManagement libDataclass = new LibraryDBClassProject.LibraryManagement();
// Checks whether the record being inserted in the database
if (libDataclass.getSearchBookID(bookID).Rows.Count != 0)
{
if (libDataclass.checkBookStatus(bookID).Rows.Count == 0)
{
int x = libDataclass.returnBook(bookID, returnDate);
if (x > 0)
{
ErrorLabel.Text = "Book returned successfully";
}
else
{
ErrorLabel.Text = "Book has not issued to anyone";
}
}
else
{
ErrorLabel.Text = "Book already returned and availble to issue.";
}
}
else
{
ErrorLabel.Text = "Book does not exist";
}
}
else
{
ErrorLabel.Text = "Book ID must be numeric. Please enter a valid ID";
}
}
else
{
ErrorLabel.Text = "Book ID can not be blank. Please enter a valid ID";
}
}
// Displays all issued books
private void ViewIssuedBooks_Load(object sender, EventArgs e)
{
try
{
LibraryDBClassProject.LibraryManagement libDataclass = new LibraryDBClassProject.LibraryManagement();
ViewIssuedBooksDataGridView.DataSource = libDataclass.getIssuedBooks();
ErrorLabel.Text = libDataclass.DBError;
}
catch (Exception ex)
{
ErrorLabel.Text = ex.Message + " An Error Occurred";
}
}
private void SeaerchStudentBooksbutton_Click(object sender, EventArgs e)
{
int StudentId;
if (StudentIDTextBox.Text != "" && StudentIDTextBox.Text != null)
{
if (int.TryParse(StudentIDTextBox.Text, out StudentId))
{
try
{
LibraryDBClassProject.LibraryManagement libDataclass = new LibraryDBClassProject.LibraryManagement();
if (libDataclass.getSearchStudentID(StudentId).Rows.Count != 0)
{
if (libDataclass.getStudentIssuedBooks(StudentId).Rows.Count != 0)
{
SearchIssuedDataGridView.DataSource = libDataclass.getStudentIssuedBooks(StudentId);
errorLabel1.Text = libDataclass.DBError;
}
else
{
errorLabel1.Text = " No Books is issued to this student";
}
}
else
{
errorLabel1.Text = " Student ID does not exist. Please enter a valid student ID";
}
}
catch (Exception ex)
{
errorLabel1.Text = ex.Message + " An Error Occurred";
}
}
else
{
errorLabel1.Text = " Student Id must be numeric. Please enter a valid student ID";
}
}
else
{
errorLabel1.Text = " Student Id can not be blank. Please enter a valid student ID";
}
}