Why do I get “Database logon failed” in Crystal Reports when using .NET object as datasource?

Question

I am creating a simple report using a .NET object from my project as datasource, using SetDatasource() method. However, when I run the report I get \"Database l

Answer 1

One of the reason of this error is, when u pass null object to a sub report ....SetDataSource(data) , where data is null