Hi,
I have report which has a Sub-report. The data on the main report is huge. When the user clicks on the link on each row the sub-report appears. The data for this sub-report is based on a number field (id - primary key) which is passed as parameter, but fetched from multiple tables (which are not part of the main report) using complex joins.
All this is working. Now let me come to the problem.
As the data in question is so huge the sub-report is awfully slow. I was thinking if I could catch hold of the parameter being passed to sub-report at runtime in ClickPage or DrillDownSubreport events, I could have created the dataset on the fly myself and set the datasource for the sub-report dynamically. This would improve performance multi-fold.
I did try 'CrystalReport11.Subreports[0].DataDefinition.ParameterFields[0].CurrentValues', but I am getting count as zero.
Also tried 'CrystalReport11.Subreports[0].ParameterFields' but getting 'Not supported within subreports.' exception.
We can not depend on the Crystal Report feature of firing the SQL from Crystal report for the subreport, as we need the application to work on different types of databases. Hence we need control over creating and supplying the datasource.
Edit: This is a Windows Forms application. The database is in a remote server accessed via internet. This is why the performance is paramount.
Please advise me the correct path to take.
-- Suresh Balasubramanian