Telerik Reporting R3 2016 - Upgrade Issues with ObjectDataSource Component

AUTHOR: Stephania Tapela

DATE POSTED: September 17, 2016

PROBLEM
Telerik Reporting R3 2016 upgrade issues with ObjectDataSource component when the data access layer is loaded from an assembly external for the report's one.

As of R3 2016 we provide stricter rules for external assemblies used by reports to get data. This is a breaking change that may lead to the following error on preview, even after running the Upgrade Wizard:


SOLUTION 

Details about the required additional settings, related to the external assembly, are available in ObjectDataSource: Configuration. The ObjectDataSource component is designed to read the assembly information from the current project's configuration file.

The settings should be applied in:

1. The Standalone Report Designer tool's configuration file, if you intend to use an ObjectDataSource component - Extending Report Designer;
   
   
2. The configuration file of the project containing Telerik Reports.
   It is recommended to keep reports in a separate project e.g. ClassLibrary project. The ObjectDataSource component's settings can be added automatically by re-running the ObjectDataSource Wizard in Visual Studio Report Designer.
   
   
3. The configuration file of the desktop application displaying/processing programmatically the report; or the configuration file of the Reporting REST|WCF Service project, this place is where reports are handled for web viewers.