datagridviewbuttoncolumn

Hello everybody, I would need some help, I'm creating a program, and through the datagridview function I get the data from the mysql database, but I need to be able to add buttons (with images) on some lines. at this moment it adds the button on all lines Example: If the event has associated a...

So i have a datagridview that has a button named "generate" to generate a random combination number next to the button column, My problem now is to pass the random number generated by the button to the column Assignment Key. The sample image below shows my wanted output.