public static DBStudents GetInstance()
{
if (dBStudents == null)
{
dBStudents = new DBStudents();
}
return(dBStudents);
}
private void addRecordButton_Click(object sender, EventArgs e)
{
string name = textNameBox.Text;
int groupId = ((Group)comboGroupBox.SelectedItem).Id;
(int, int)result = DBStudents.GetInstance().AddNewStudent(name, groupId);
form.addedLabel.Visible = true;
form.idLabel.Visible = true;
form.addedInputLabel.Text = result.Item1.ToString();
form.idInputLabel.Text = result.Item2.ToString();
DialogResult = DialogResult.OK;
Close();
}
private void countButton_Click(object sender, EventArgs e)
{
countInputLabel.Text = DBStudents.GetInstance().GetCount().ToString();
countLabel.Visible = true;
}
private void readButton_Click(object sender, EventArgs e)
{
IEnumerable <StudentGroupRecord> records = DBStudents.GetInstance().GetAllStudents();
FillTable(records);
}
