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This sample demonstrates enabling shared data sources in ActiveReports WebDesigner with an ASP.NET Core back-end.

https://github.com/activereports/WebSamples20/tree/main/WebDesigner_CustomSharedDataSources
When you run the sample, the WebDesigner opens in your browser wherein you can use shared data sources in your reports. The project consists of the following elements.
wwwroot: Contains index.html and other static resources.
Implementation: Contains implementation for 'IReportStore' and 'IResourceRepositoryProvider' .
resources: Contains reports, data sources (csv, json, sqlite), and shared data sources (*.rdsx ).
Startup.cs: Does the following:
configures the services and middleware used by the application
registers the 'IReportStore' and 'IResourceRepositoryProvider' as singleton services
adds reporting and designer services
sets the path to the ActiveReports.config file, where the SQLite provider is added
configures the reporting and designer middleware
serves static files