private void RefreshActivity(int days)
{
chartActivity.Series["Requested"].DataSource = Order.GetWishListSummary(days);
chartActivity.Series["Cancelled"].DataSource = Order.GetOrdersForReport(OrderStatus.Constant.CANCELED, days);
chartActivity.Series["Issued"].DataSource = IssueDoc.GetIssueSummary(days);
chartActivity.Series["Picklist"].DataSource = PickList.GetPickListSummary(days);
}