private void btnExport_Click(object sender, EventArgs e)
        {
            var sfd = new SaveFileDialog();

            if (sfd.ShowDialog() == DialogResult.OK)
            {
                var from = (DateTime)dEFrom.EditValue;
                var to   = (DateTime)dEditTo.EditValue;
                _dataSource.LoadAnnualIssuedAmountForInstitutionsByDateRange(from, to);
                _report.DataSource = _dataSource.DefaultView;

                _report.ExportToXlsx(sfd.FileName + ".xlsx");
                XtraMessageBox.Show("Finished Exporting");
            }
        }