Hi Shivali,
Thanks for Contacting Syncfusion support.
Right now, we have created our Autocomplete control with the simple Entity framework data model datasource connection. We could get the data from Entity datasource and give that data to the Autocomplete.
Please find the sample for your reference below:
We also would like you to share us more information on the control used and database connection you are trying to work with. Also, share error details if any, so that this would helpful to analyze further and provide an appropriate solution.
Regards,
Arun P.