//Student
private void Add_Click(object sender, RoutedEventArgs e)
{
int group;
if (int.TryParse(GroupBox.Text, out group))
{
}
else
{
MessageBox.Show("You have entered a wrong data");
}
if (GroupBox.Text == "" || StudentNameBox.Text == "" || HometownBox.Text == "")
{
MessageBox.Show("Fill in all data and continue");
}
else
{
string ConnectionString = @"Data Source=DESKTOP-R0R983R;Initial Catalog=ADO.NET;Integrated Security=True";
using (SqlConnection cn = new SqlConnection(ConnectionString))
{
cn.Open();
SqlTransaction transaction = cn.BeginTransaction();
SqlCommand command = cn.CreateCommand();
command.Transaction = transaction;
try
{
command.CommandText = $"INSERT INTO STUDENT (IDGROUP, NAME, HOMETOWN) VALUES ({group}, '{name}', '{hometown}');";
command.ExecuteNonQuery();
transaction.Commit();
MessageBox.Show("Object has been added");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
transaction.Rollback();
}
}
GroupBox.Clear();
StudentNameBox.Clear();
HometownBox.Clear();
}
}
} //END OF MAIN WINDOW CONSTRUCTOR
//An event handler that handles all of the button clicks on the main application page.
private void EnrollButton_ClearButton_SetStaffButton_ClearStaffButton_AddToModuleButton_StudentModRemoveButton_Click(object sender, RoutedEventArgs e)
{
// STAFF //
//Sets the details entered into the text boxes as the current staff members details.
if (sender == SetStaffButton) //If the set staff button is clicked.
{
//A data Range check to make sure correct values hve been entered into each textbox.
if (StaffNameBox.Text == "" || StaffEmailBox.Text == "" || StaffAddressBox.Text == "" || DepartmentBox.Text == "" || RoleBox.Text == "" || PayrollNoBox.Text == "")
{
//Display an error message box.
MessageBox.Show("You have left one or more fields blank. Please enter values in all of the fields.");
}
else
{
//Range checks payroll number.
if (int.Parse(PayrollNoBox.Text) < 9000 || int.Parse(PayrollNoBox.Text) > 9999)
{
MessageBox.Show("You have entered a payroll number that is not within the range (9000 - 9999). Re-enter.");
}
else
{
//Add this newly created staff to the staff list to then be added to the staff data grid.
StaffList.Add(new Staff(StaffNameBox.Text, StaffEmailBox.Text, StaffAddressBox.Text, int.Parse(PayrollNoBox.Text), DepartmentBox.Text, RoleBox.Text));
}
}
} //END OF ADD STAFF BUTTON
//Clears the currently entered details in the staaff details boxes.
if (sender == ClearStaffButton)
{
//Clear the contents of the staff detail boxes.
StaffNameBox.Clear();
StaffAddressBox.Clear();
StaffEmailBox.Clear();
PayrollNoBox.Clear();
DepartmentBox.Clear();
RoleBox.Clear();
} //END OF CLEAR STAFF BUTTON
//STUDENT//
//If the Enroll Button is clicked this method is carried out.
//This will create a new student object and add it to the student list.
//Any details entered into the textboxes will be saved to the current student object.
//The students in the student list will be saved to a Student.txt file in the debug folder.
if (sender == EnrollButton)
{
//A range check to make sure non of the fields are blank.
if (StudentNameBox.Text == "" || StudentEmailBox.Text == "" || StudentAddressBox.Text == "" || MatricnoBox.Text == "")
{
MessageBox.Show("You have left one or more of the fields blank. Please enter values.");
}
else
{
if (int.Parse(MatricnoBox.Text) >= 1000 && int.Parse(MatricnoBox.Text) <= 9000)
{
//Add this newly created student to the student list.
StudentList.Add(new Student(StudentNameBox.Text, StudentEmailBox.Text, StudentAddressBox.Text, int.Parse(MatricnoBox.Text)));
}
else
{
MessageBox.Show("The matriculation number box contains incorrect values. Enter within 1000 and 9000.");
}
}
} //END OF ENROLL STUDENT BUTTON
//A clear button to clear the contents in the student detail boxes.
if (sender == ClearButton)
{
//Clear all student details in the text boxes.
StudentNameBox.Clear();
StudentEmailBox.Clear();
StudentAddressBox.Clear();
MatricnoBox.Clear();
} //END OF CLEAR STUDENT DETAILS BUTTON
//MODULES//
//This function is carried out when the add to module button is clicked.
//This takes the student selected from the combo box and adds that student to the selected module in the second combo box.
if (sender == AddToModuleButton)
{
//This searches through the student list for a students name that is equal to the student combo box selection.
Student search = StudentList.FirstOrDefault(z => z.Name == StudentCNameBox.Text);
//If the name typed into the text box (studentCNameBox) is found then this is carried out.
if (search != null) //If search is not equal to null.
{
//If the user selects Database Systems in the combo box when clicking the add button.
if (ModuleComboBox.SelectedItem == "Database Systems")
{
//Add the student from the student list whos name matches the name in the textbox to the selected module.
DatabaseList.Add(new Student(search.Name, search.MatricNumber, search.Mark, search.Status));
}
//If the user selects Systems and Services in the combo box when clicking the add button.
if (ModuleComboBox.SelectedItem == "Systems and Services")
{
//Add the student from the student list whos name matches the name in the textbox to the selected module.
SystemsAndServicesList.Add(new Student(search.Name, search.MatricNumber, search.Mark, search.Status));
}
//If the user selects Software Development in the combo box when clicking the add button.
if (ModuleComboBox.SelectedItem == "Software Development")
{
//Add the student from the student list whos name matches the name in the textbox to the selected module.
SoftwareDevelopmentList.Add(new Student(search.Name, search.MatricNumber, search.Mark, search.Status));
}
}
} //END OF ADD STUDENT TO MODULE BUTTON
//A button that allows for the removal of a student from a specific module.
if (sender == StudentModRemoveButton) //If the Remove Student button is clicked.
{
//This searches through the student list for a students name that is equal to the string entered into the StudentCNamebox.
//Sets this object to look.
Student look = StudentList.FirstOrDefault(z => z.Name == StudentCNameBox.Text);
//If the name is found then this is carried out.
if (look != null)
{
//If the Database Systems option is selected in the combo box.
if (ModuleComboBox.SelectedItem == "Database Systems")
{
//Remove the student from the database list.
//Creates a variable called itemToRemove and sets its values to equal the name entered in the textbox.
//For each instance of that item in the list, it is removed from the list.
var itemToRemove = DatabaseList.Where(z => z.Name == look.Name).ToList();
foreach (var item in itemToRemove)
{
DatabaseList.Remove(item); // Removes each instance of that student within the given module list.
}
}
//If the Systems and Services option is selected in the module combo box and the remove student is clicked...
if (ModuleComboBox.SelectedItem == "Systems and Services")
{
//Remove the student from the database list.
//Creates a variable called itemToRemove and sets its values to equal the name entered in the textbox.
var itemToRemove = SystemsAndServicesList.Where(z => z.Name == look.Name).ToList();
foreach (var item in itemToRemove)
{
SystemsAndServicesList.Remove(item); // Removes each instance of that student within the given module list.
}
}
//If the Software Development option is selected in the combo box and the remove student button is clicked...
if (ModuleComboBox.SelectedItem == "Software Development")
{
//Remove the student from the software development list.
//Creates a variable called itemToRemove and sets its values to equal the name entered in the textbox.
var itemToRemove = SoftwareDevelopmentList.Where(z => z.Name == look.Name).ToList();
foreach (var item in itemToRemove)
{
SoftwareDevelopmentList.Remove(item); // Removes each instance of that student within the given module list.
}
}
}
} //END OF STUDENT REMOVE BUTTON
} //END OF BUTTON EVENT HANDLER
