private void deleteSubjectButton_Click(object sender, EventArgs e)
{
string selectedGroup = (string)subjectsListBox.SelectedItem;
SqlCommand comm = new SqlCommand("SELECT COUNT(*) FROM Groups WHERE SubjectId = @SubjectId");
comm.Parameters.AddWithValue("@SubjectId", Subjects.GetSubjectIdByName(selectedGroup));
int groupsAffected = SqlTools.ExecuteScalar(comm);
// Create a simple MessageBox for admin confirmation.
DialogResult dialogResult = MessageBox.Show("Are you sure you want to delete the selected subject?\r\n" +
groupsAffected + " groups will be deleted!",
"Delete subject",
MessageBoxButtons.YesNo,
MessageBoxIcon.Warning);
switch (dialogResult)
{
case DialogResult.Yes:
Subjects.DeleteSubject(selectedGroup);
break;
default:
// Do nothing
break;
}
}