A Data Item
can have only a single data source. Thus, in order to use multiple data sources in the report, you will need to add multiple data items.
Since data items cannot be added to the Page Header section, the only way to display data there is to assign the Report.DataSource
to the 2nd ObjectDataSource
The 1st ObjectDataSource can be used together with a separate data item nested in the detail section
of the report or in a static group section
which won't be repeated for each data row of the report's data source.
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