Should we assume that by "change data source" you mean changing the connection string? We will need more information about your reports:
- are they in xml format?
- what data source do they use?
In case you have trdx files, you can modify the provided xml file and change the connectionString manually. As a dynamic approach for connection string update, please check the described solution in this forum thread: Change Connection String at Runtime on Drillthrough Report
- works for both trdx and ClassLibrary reports.
If you need more help on the matter, please send us the mentioned details and even better, a sample project illustrating the scenario.
All the best,
the Telerik team
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