private void btnUpdate_Click(object sender, EventArgs e)
{
if (SelectedId > 0)
{
var customer = bo.GetById(SelectedId);
customer.Name = txtName.Text;
customer.Surname = txtSurname.Text;
customer.Gender = cmbGender.Text;
customer.Phone = mskPhone.Text;
customer.Email = txtEmail.Text;
customer.IdentityNumber = Convert.ToInt64(txtIdentityNumber.Text);
customer.RoomNumber = Convert.ToInt32(txtRoomNumber.Text);
customer.Pay = Convert.ToDecimal(txtPay.Text);
customer.EntryDate = dtpEntryDate.Value;
customer.ReleaseDate = dtpReleaseDate.Value;
bo.Update(customer);
RefreshCustomers();
}
dgvViewSetting(dataGridView1);
}