Hi Marco,
Please have a look at our TogglingDataSource sample under Related tables category that ships with our Essential Grid Install or in our
Online Samples demo, You can see this sample in the following location in the system where syncfusion is installed. {installed Location}\Web\Grid.Grouping.Web\Samples\2.0\Related Tables\Toggling DataSource.
In our
Online Samples demo you can see this sample under Grid.Grouping.Web->RelatedTables->Toggling DataSource, category
In the above mentioned sample we choose different Dataset and fill the grid in callback mode. Please have a look at the CallbackPanel1_CallbackRefresh Event for more info
Thanks,
A.Sivakumar