private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e) { // Column 0 is the Checkbox column that I need. if (e.ColumnIndex == 0) { // This gets the Checkbox cell. DataGridViewCheckBoxCell cell = (DataGridViewCheckBoxCell)fileGrid.Rows[e.RowIndex].Cells[0]; // Always displays True. MessageBox.Show((cell.Value == null) + ""); } }