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

You can use this code on your grid CellClick event for check or unchecked cell checkbox :

private void Grid_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        if (e.ColumnIndex == 0)
        {
            Grid.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = (Grid.Rows[e.RowIndex].Cells[e.ColumnIndex].Value == null ? true : (!(bool)Grid.Rows[e.RowIndex].Cells[e.ColumnIndex].Value));
        }
    }