SAP Crystal Reports Viewer does not display in browser

Question

I own a ASP.NET web project with framework 4.5. Is installed and implemented an SAP report for VS2012 Crystal Reports Developer.

Making in Local report, it works correct

Answer 1

I had a situation where I had some Crystal Reports created using connection "SQL Server Native Client 11.0" and some using connection "Microsoft OLE DB Provider for SQL Server". Both worked on our old server running IIS 6. However, when we migrated over to a new server running IIS 8.5, some reports worked as expected, while others displayed an empty Crystal Reports viewer. After 4-5 days of pulling my hair out and trying everything I could think of, I finally compared everything between the reports that worked vs. the reports that did not work. What I discovered was the reports that worked used the "Microsoft OLE DB Provider for SQL Server" connection. Once I made this change, the reports served up perfectly.