ACTUAL ANSWER
The external RDLC contains a LIST control that contains the following controls:
- TABLE (containing items related to the collection as a whole)
- Subreport
SUBREPORT points to an RDLC that contains the following controls:
- TABLE (containing row items)
(1) Use the LIST grouping property to group your 1-in-N collections.
The grouping property can be found by selecting the LIST control and then selecting Visual Studio Menu options: VIEW> PROPERTIES WINDOW.
(2) Then set the LIST data source.
This can be found by selecting REPORT, and then selecting the Visual Studio menu options as follows: REPORT> DATA SOURCES. Drag any field onto the control and the data source will automatically adjust.
NOTE:
If you cannot "see" any data sources in the Visual Studio data sources window, it is "possible" because the service links in your project cause problems ... temporarily exclude them from your project and select the RESFRESH icon in the Visual data sources window Studio (they should appear). Unfortunately, you have to do this EVERY time your data source changes.
After the LIST iteration is correct, you can add SUBREPORT and any other controls.
... I OFFICIALLY hate RDLC right now.
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