loop through checkboxcolumn in datagrid in wpf checked or not

[Ahmed]

i want to get the value of CheckBoxColumn in DataGrid wpf
i try this code

 

foreach (spShowTotal_Result item in dgShowStudent.ItemsSource)
        {

            bool? check = ((CheckBox)dgShowStudent.Columns[0].GetCellContent(item)).IsChecked;

        }

but this exception appear
Unable to cast object of type 'System.Windows.Controls.ContentPresenter' to type 'System.Windows.Controls.CheckBox'.

[Ahmed]

solution is here

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