private void btnAdd_Click(object sender, EventArgs e)
        {
            var customerRepository = new SqlCustomerRepository(frmGymManager.connectionString);
            var customer           = new Customer();

            if (dgvAddCustomer.CurrentRow.Cells[0].Value != null && dgvAddCustomer.CurrentRow.Cells[1].Value != null &&
                dgvAddCustomer.CurrentRow.Cells[2].Value != null && dgvAddCustomer.CurrentRow.Cells[3].Value != null)
            {
                customer.Name        = dgvAddCustomer.CurrentRow.Cells[0].Value.ToString();
                customer.Surname     = dgvAddCustomer.CurrentRow.Cells[1].Value.ToString();
                customer.Street      = dgvAddCustomer.CurrentRow.Cells[2].Value.ToString();
                customer.HouseNumber = Convert.ToInt32(dgvAddCustomer.CurrentRow.Cells[3].Value);
                customer.PhoneNumber = dgvAddCustomer.CurrentRow.Cells[4].Value.ToString();
                customer.Email       = dgvAddCustomer.CurrentRow.Cells[5].Value.ToString();
                customer.Validaty    = Convert.ToInt32(dgvAddCustomer.CurrentRow.Cells[7].Value);
                customer.Price       = Convert.ToInt32(dgvAddCustomer.CurrentRow.Cells[8].Value);
                customer.CardType    = dgvAddCustomer.CurrentRow.Cells[6].Value.ToString();
                customer.AdminId     = ActiveAdmin.Id;

                if (customerRepository.AddNewCustomer(customer) > 0)
                {
                    MessageBox.Show("Successfull operation", "Done", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    this.Close();
                }
                else
                {
                    MessageBox.Show("Try Again", "Allert", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
            else
            {
                MessageBox.Show("Enter data!");
            }
        }
 private void btAdd_Click(object sender, EventArgs e)
 {
     //checks inputs for length and isempty
     if (tbName.Text.Length <= 50 && !String.IsNullOrWhiteSpace(tbName.Text) &&
         tbSurname.Text.Length <= 50 && !String.IsNullOrWhiteSpace(tbSurname.Text) &&
         tbContactPhone.Text.Length <= 50 && !String.IsNullOrWhiteSpace(tbContactPhone.Text) &&
         tbAdress.Text.Length <= 50 && !String.IsNullOrWhiteSpace(tbAdress.Text))
     {
         var customerRepository = new SqlCustomerRepository(Globals.connectionString);
         customerRepository.AddNewCustomer(new Customer()
         {
             Adress       = tbAdress.Text,
             ContactPhone = tbContactPhone.Text,
             Name         = tbName.Text,
             Surname      = tbSurname.Text
         });
         this.Close();
     }
     else
     {
         MessageBox.Show("Plesae verify input data", "Input error", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }