Question

I have a Crystal Report in Visual Studio 2008 (C#). Its datasource is set programmatically at run-time to a .NET list, defined as follows:

List<visit_volume> Visits

a visit_volume looks like this:

public class visit_template
{
    private int _numberOfVisits;
    public int numberOfVisits
    {
        get { return this._numberOfVisits; }
        set { this._numberOfVisits = value; }
    }

    // other ints and doubles declared here
    // ..
    // ..

    private List<mEvent> _events;
    public List<mEvent> events
    {
        get { return this._events; }
        set
        {
            // updates _numberOfVisits here
            // ..
            // build-up a debugging string of each mEvent
            // ..
        }
    }
}

So, being fed into the Crystal Report is a List<> of visit_volume objects, which themselves contain a List<> of mEvent objects.

In Crystal Reports, I can see the contents of the Visits list, but I can’t access and report on the contents of the events member – it just doesn’t show. Is this because Crystal can’t handle nested List<> structures, or am I doing something wrong?

Thanks in advance.

Answer 1

Having thought about it, the answer to this might be to include a subreport which simply has the events structure as its datasource.