private async void ShowAccountMethod()
{
DateFrom = _saleServ.GetFirstDate(_selectedSalesperson.ID);
DateTo = _saleServ.GetLastDate(_selectedSalesperson.ID);
TotalBillPrice = _saleServ.GetTotalBillPrice(_selectedSalesperson.ID, _dateFrom, _dateTo);
GetSalespersonAccountsMethod();
_salespersonAccountShowDialog.DataContext = this;
await _currentWindow.ShowMetroDialogAsync(_salespersonAccountShowDialog);
}