Programmatically access Inner report instance during DrillThrough scenario (ASP.NET)

[Jaroslav]

Hi Telerik team,

in my ASP.NET reporting solution I need several requirements to be met:

• Support for DrillThrough reports
• Support for advanced parameters handling. I have 10s of parameters. Parameters are assigned to groups which can be expanded/collapsed in GUI. In one sentence - rendering and structure of parameters is too complicated to be handled by Telerik Reporting built-in mechanism.

My design is following:

I render input controls for report parameters on my own. These parameters are serialized to a single complex object after submit. This single complex object is set to currently processed report using following assignment:

protected void Button1_Click(object sender, EventArgs e)
{
 // ...

 ((BaseReport)ReportViewer1.Report).Parameters = parameters;

 // ...
}

Property named Parameters is defined in BaseReport class, which is base class for all my reports.

I assign Parameters property to my datasource parameter in ItemDataBinding event (ItemDataBinding event is defined in BaseReport class, as well).

private void BaseReport_ItemDataBinding(object sender, EventArgs e)
{
 // ...

 ((ObjectDataSource)DataSource).Parameters[0] = new ObjectDataSourceParameter("compositeParameters", typeof(CompositeParameters), Parameters);

 // ...
}

 
Here is the problematic situation:

1. ReportViewer.Report is set to OuterReport in design time
2. I run the app and view OuterReport
3. OuterReport has DrillThrough capability, so I click a link and it navigates me to InnerReport
4. I would expect that (ReportViewer1.Report == InnerReport). Problem is, that (ReportViewer1.Report == OuterReport).

Thus I'm not able to assign parameters in mentioned way (((BaseReport)ReportViewer1.Report).Parameters = parameters;) to InnerReport. In DrillThrough scenario, OuterReport is always stored in property ReportViewer1.Report of ASP.NET report viewer.

Is there a way how to access instance of InnerReport which is navigated using DrillThrough.

Is there any alternative design that would work with Telerik Reporting better?

Thanks for your help!

Jaro

P.S.: I'm expecting problems with refreshing of InnerReport after setting parameters to it. But that's another story.