Check/Uncheck a checkbox on datagridview

Question

Can someone help me why it doesn\'t work? I have a checkbox and if I click on it, this should uncheck all the checkbox inside the datagridview which were check

Answer 1

All of the casting causes errors, nothing here I tried worked, so I fiddled around and got this to work.

  foreach (DataGridViewRow row in dataGridView1.Rows)
        {
            if (row.Cells[0].Value != null && (bool)row.Cells[0].Value)
            {
                Console.WriteLine(row.Cells[0].Value);
            }

        }