protected void btnFilter_Click(object sender, EventArgs e)
{
string emirate = ddlEmirates.SelectedValue;
int? organizationId = null;
DateTime?dateFrom = null;
DateTime?dateTo = null;
if (int.TryParse(ddlOrganizations.SelectedValue, out int parsedOrgId))
{
organizationId = parsedOrgId;
}
if (DateTime.TryParse(txtDateFrom.Text, out DateTime parsedDateFrom))
{
dateFrom = parsedDateFrom;
}
if (DateTime.TryParse(txtDateTo.Text, out DateTime parsedDateTo))
{
dateTo = parsedDateTo;
}
DataTable opportunities = Opportunity.GetAllFiltered(emirate, organizationId, dateFrom, dateTo);
ListOpportunities(opportunities);
}