Binding to dataSource with aggregates and grouping

[Roland]

I'm binding a DropDownList to a datasource with aggregates and grouping. Is that possible?

I'm getting the error:
Uncaught TypeError: Cannot call method 'toLowerCase' of undefined

[Georgi Krustev]

Hello Roland,

 
Thank you for contacting us. The ComboBox/DropDownList/AutoComplete widget supports binding to flat data. You will need to create a new DataSource, which will persist the data in a flat manner.

Regards,
Georgi Krustev
the Telerik team