I have a grid with a master_checkbox when I click on it it selects all rows perfectly, but then I reload the grid and the master_checkbox is still checked, how can I unchecked or reset it when reloading the grid?
I am using the 3.5 full pro version

Unfortunately this is not available.
You will have to destroy the header with your data before the reloading.
ok thanks for your answer
I think it would be great in a future release if you reset the checkbox master automatically or provide a functionality to reset it when desired
Thank you
BTW, I used detach and attachheader again to reset the checkbox and for a moment it shows two header
BTW, I used detach and attachheader again to reset the checkbox and for a moment it shows two header.
Unfortunately the issue cannot be reconstructed locally. If issue still occurs - please, provide any kind of sample of your code to reconstruct the issue.