private void button3_Click(object sender, EventArgs e)
{
emp.SupplierID = int.Parse(textBox1.Text);
emp.CompanyName = textBox2.Text;
emp.Address = textBox3.Text;
emp.ContactPerson = textBox4.Text;
emp.ContactNo = textBox5.Text;
emp.Edit(empID);
MessageBox.Show("Edit Record Successful!");
ResetControls();
}