Hi Vasanth,
Thanks for using Syncfusion Products.
We have analyzed your requirement “I need to override ScrollViewer inside the SfDataGrid so that it shows same Scroll Indicator when using with mouse or touch.”
And we would like to let you know that it is the default behavior of WinRT Scrollviewer. This can be achieved by editing the style of ScrollViewer template of SfDataGrid.
We have prepared a sample based on this and it can be downloaded from the below location.
Sample: ScollViewer.zip
Please let us know, if you require further assistance on this.
Regards,
Jayaleshwari N