private void ClearFields()
{
BookNumberTB.Clear();
PhoneNumberTB.Clear();
EmailAddressTB.Clear();
PasswordTB.Clear();
CPasswordTB.Clear();
FacultyCB.Text = "";
DepartmentCB.Text = "";
DepartmentCB.Enabled = false;
GroupCB.Text = "";
GroupCB.Enabled = false;
RegCB.Checked = false;
}
private void BookNumberTB_TextChanged(object sender, EventArgs e)
{
try
{
Convert.ToInt32(BookNumberTB.Text);
}
catch (System.FormatException)
{
BookNumberTB.Clear();
}
if (BookNumberTB.Text == "")
{
RegBTN.Enabled = false;
}
else
{
RegBTN.Enabled = true;
}
}
