protected void OnBtnGoClicked(object sender, EventArgs e)
{
if (!datStartDate.SelectedDate.HasValue || !datEndDate.SelectedDate.HasValue)
{
string message = ResourceManager.GetString("messageInvalidDateTurnover");
string script = "<script type=\"text/javascript\">";
script += " alert(\"" + message + "\");";
script += " </script>";
if (!ClientScript.IsClientScriptBlockRegistered("ttt"))
ClientScript.RegisterStartupScript(this.GetType(), "ttt", script);
}
else
{
InvoicesRepository repo = new InvoicesRepository();
double? iAmount = repo.GetSumAmountNotVAT("I", datStartDate.SelectedDate, datEndDate.SelectedDate);
double? cAmount = repo.GetSumAmountNotVAT("C", datStartDate.SelectedDate, datEndDate.SelectedDate);
double result = (iAmount.HasValue ? iAmount.Value : 0) - (cAmount.HasValue ? cAmount.Value : 0);
txtResult.Text = result.ToString();
}
}
