Hello Nishan,
Thank you for writing.
There is SelectAll method, it is exposed on the PivotGridElement:
You just need to make sure you call it only after the grid is populated with data,
otherwise an error will be thrown. In your
case you can try the Form Load or Shown events.
I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.
Regards,
Stefan
Telerik
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