I have old system using C# and crystal reports ,

I create a crystalreport on aspx using c# and it work correctly on export as a pdf,xlsx,xls,csv,rpt but in data only (xlsx) some column is missing and order switching. I use crystalreportViewer13.

I am trying in my winforms to add a combobox which will display 2 different crystal reports. When i click on one report it will show me the data from that report. How can i do that? I am using VS 2022 and Oracle database.