private void ListLeasing() { try { DataTable dt = FillComboBox.DBGetLeasing(Guid.Empty); if (dt.Rows.Count > 0) { dt.DefaultView.Sort = "Nama ASC"; cboLeasing.DisplayMember = "Nama"; cboLeasing.ValueMember = "RowID"; DataRow dr = dt.NewRow(); dr["RowID"] = Guid.Empty; dr["Nama"] = ""; dt.Rows.Add(dr); cboLeasing.DataSource = dt.DefaultView; } else { dt.Clear(); cboLeasing.DataSource = dt; } } catch (Exception ex) { Error.LogError(ex); } }