protected override void btnSave_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(ValidateInput()))
            {
                string result = string.Empty;

                if (_isUpdating)
                {
                    var date = CreateUpdateTicketSaleDate();
                    result = _business.Update(date);
                }
                else
                {
                    var date = CreateNewTicketSaleDate();
                    result = _business.Insert(date);
                }
                if (string.IsNullOrEmpty(result))
                {
                    ChangeViewStatus(false);
                    DataBind();
                }
                else
                {
                    MessageBox.Show(result, Constants.Messages.ERROR_CAPTION, MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            else
            {
                MessageBox.Show(ValidateInput(), Constants.Messages.ERROR_CAPTION, MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }