crosstab databinding (in subreport)

[Koen L]

I am trying to bind a type CustomerInvoiceLogs ( : List<CustomerInvoiceLog>) to a crosstab in a subreport.
I start by passing on the data in to the subreport in the subreports NeedDataSource event in the main report design window.

private void subPortfolioStatistics_NeedDataSource(object sender, EventArgs e)
{
    Telerik.Reporting.Processing.SubReport subReport = (Telerik.Reporting.Processing.SubReport) sender;

    CustomerPortfolios custPortfolio = (CustomerPortfolios) subReport.DataObject.RawData;
    _customerPortfolio = custPortfolio.customerPortfolios;

    if (_customerPortfolio != null && _customerPortfolio.Count > 0)
    {
        CustomerInvoiceLogs customerInvoiceLogs = new CustomerInvoiceLogs();

        foreach (CustomerPortfolio cp in _customerPortfolio)
        {
            customerInvoiceLogs.AddRange(DFInvoiceStats.InvoicesByCustomerIdWithoutTaxNumberRelation(cp.CustomerId, _startYear, _endYear));
        }

        subReport.InnerReport.DataSource = customerInvoiceLogs;
    }
}

In the NeedDataSource above I pass on the customerInvoiceLogs collection class to the subreport. Which I can use if I drag properties from the ObjectDataSource to the Design detail section of the subreport.

If I try using the same ObjectDataSource to fill in values in the crosstab control the cells stay blank (they don't contain values like the textboxes, however there is a crosstab created for every value in customerInvoiceLogs (the headers are displayed). Could anyone let me know why this is and how I can resolve this problem.

[Koen L]

I've managed to resolve this issue.
Instead of binding the collection object to the subreport I've bound it directly to the crosstab (changed it's modifier to public). This seems to work.