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

I hade the same problem and it was due to the fact that I accidentally added anoher DataTable with the same name.

var ds = new OrderDetail();
var dt = new OrderDetail.ResultDataTable();
//fill dataset here
ds.Tables.Add(dt);

After setting that DataSet as datasource I got the login failed error when exporting the report.

I then added a line to remove the DataTable before adding the new DataTable:

ds.Tables.Remove(dt.TableName);