Hi Aravind,
Greetings from Syncfusion support.
Based on your requirement you want to perform an action when you double click on a row. By default in EJ2 Grid, when you double click a row, You can start the edit action by double clicking the particular row. We have discussed about this in the below documentation. Please refer the documentation.
If you wish to do some other action on double clicking the row then please explain what kind of action you are expecting to do on double clicking a row.
Please get back to us for further details.
Regards,
Joseph I.