How to find control in datagrid in wpf?

Here you go

 

https://social.msdn.microsoft.com/Forums/vstudio/en-US/cab90c74-9b49-4237-b49e-485d7c4958ed/accessing-checkboxes-in-wpf-datagrid?forum=wpf 

 

loop through

 

https://stackoverflow.com/questions/38177490/loop-through-checkboxcolumn-in-datagrid-in-wpf-checked-or-not