private void BackToMainScreenStudent_Click(object sender, EventArgs e)
{
ManageStudentsForm form = new ManageStudentsForm();
this.Close();
form.Show();
}
private void GoToStudentsForm_Click(object sender, EventArgs e)
{
ManageStudentsForm form = new ManageStudentsForm();
form.Show();
this.Hide();
}
private void SaveStudentButton_Click(object sender, EventArgs e)
{
try
{
Person person = new Person();
try
{
person.fname = FirstNametext.Text;
}
catch (ArgumentException)
{
MessageBox.Show("Please Enter correct first name!");
FirstNametext.Clear();
throw new ArgumentException();
}
try
{
person.lname = LastNameText.Text;
}
catch (ArgumentException)
{
MessageBox.Show("Please Enter correct last name!");
LastNameText.Clear();
throw new ArgumentException();
}
try
{
person.Contact = ContactText.Text;
}
catch (ArgumentException)
{
MessageBox.Show("Please enter the correct 11 digit contact number");
ContactText.Clear();
throw new ArgumentException();
}
try
{
person.Email = EmailText.Text;
}
catch (ArgumentException)
{
MessageBox.Show("Please Enter the email address");
EmailText.Clear();
throw new ArgumentException();
}
catch (FormatException)
{
MessageBox.Show("Please Enter the correct email address");
EmailText.Clear();
throw new ArgumentException();
}
try
{
person.DOB = DOBdateTimePicker.Value;
}
catch (ArgumentException)
{
MessageBox.Show("Person Age Must Be Greater Than 18");
DOBdateTimePicker.Value = DateTime.Now;
throw new ArgumentException();
}
try
{
person.Gender = GenderComboBox.Text;
}
catch (ArgumentException)
{
MessageBox.Show("Please Select the gender From the dropdown list");
throw new ArgumentException();
}
Student student = new Student();
try
{
student.regNo = RegistrationNoText.Text;
}
catch (ArgumentException)
{
MessageBox.Show("Please Enter the Registration Number in the Format 1234-XY-567");
RegistrationNoText.Clear();
throw new ArgumentException();
}
if (value1 == "add")
{
SqlConnection connection = new SqlConnection(connString);
connection.Open();
string genderid = string.Format("SELECT Id FROM LookUp WHERE Value = '{0}' AND Category = 'GENDER'", person.Gender);
SqlCommand cmd = new SqlCommand(genderid, connection);
int id = (Int32)cmd.ExecuteScalar();
String cmdtext = String.Format("INSERT INTO Person(FirstName, LastName, Contact, Email, DateOfBirth, Gender) values('{0}','{1}', '{2}', '{3}', '{4}', '{5}' )", person.fname, person.lname, person.Contact, person.Email, person.DOB, id);
cmd.CommandText = cmdtext;
cmd.ExecuteNonQuery();
string getid = string.Format("SELECT id FROM Person WHERE Email = '{0}'", person.Email);
cmd.CommandText = getid;
id = (Int32)cmd.ExecuteScalar();
string addStudent = string.Format("INSERT INTO Student(Id, RegistrationNo) values('{0}' , '{1}')", id, student.regNo);
cmd.CommandText = addStudent;
cmd.ExecuteNonQuery();
MessageBox.Show("Student Added");
connection.Close();
}
else if (value1 == "edit")
{
SqlConnection connection = new SqlConnection(connString);
connection.Open();
string getGenderId = string.Format("SELECT Id FROM LookUp WHERE Value = '{0}' AND Category = 'GENDER'", GenderComboBox.Text);
SqlCommand cmd = new SqlCommand(getGenderId, connection);
int gender = (Int32)cmd.ExecuteScalar();
string update = string.Format("UPDATE Student SET RegistrationNo = '{0}' WHERE Id = '{1}'", RegistrationNoText.Text, IDStudent);
cmd.CommandText = update;
cmd.ExecuteNonQuery();
cmd.CommandText = string.Format("UPDATE Person SET FirstName = '{0}', LastName = '{1}', Contact = '{2}', Email = '{3}', " +
"DateOfBirth = '{4}', Gender = '{5}' WHERE Id = '{6}'", FirstNametext.Text, LastNameText.Text, ContactText.Text, EmailText.Text, DOBdateTimePicker.Value, gender, IDStudent);
cmd.ExecuteNonQuery();
MessageBox.Show("Student Updated!");
connection.Close();
}
ManageStudentsForm form = new ManageStudentsForm();
this.Close();
form.Show();
}
catch (Exception)
{
MessageBox.Show("Student not saved. Please try again!");
}
}