Generating report twice before exporting it programmatically?

Hello everyone,

I'm trying to build a TOC with the help of a database (as described here: http://www.vbforums.com/showthread.php?546046-Dynamic-Crystal-Reports-Table-of-Contents-Index), but now I'm facing a big problem:

I generate my report programmatically in C# and export it using the method

ReportClass.ExportToStream(CrystalDecisions.Shared.ExportFormatType.CrystalReport);

I cannot find a way to generate the report more than once to have the correct database entries in my report.

Can someone help me solving this problem?

Thanks in advance,

Janina