private void deleteButton_Click(object sender, EventArgs e)//deletes the customer from the system. OR shows error if the open balance is not 0
{
if (!(customerNumberUpDown.Text == "0"))
{
if (Customer.CheckBalance(customerNumberUpDown.Text))
{
Customer.DeleteCustomer(customerNumberUpDown.Text);
using (StreamWriter log = File.AppendText(path))
{
log.WriteLine("" + DateTime.Now + " : Customer delete: CustomerNumber = " +
customerNumberUpDown.Text + ";");
this.Close();
}
}
else
{
MessageBox.Show("The balance has to be 0 before deleting a customer");
}
}
else
{
MessageBox.Show("Please choose a Customer!");
}
}