Listen for the enter key and move on the next column or row on datagridview

EnterOnGrid.cs

protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
{
    try
    {
        int icolumn = dgvCart.CurrentCell.ColumnIndex;
        int irow = dgvCart.CurrentCell.RowIndex;

        if (keyData == Keys.Enter)
        {
            if (icolumn == dgvCart.Columns.Count - 1)
            {
                dgvCart.Rows.Add();
                dgvCart.CurrentCell = dgvCart[0, irow + 1];
            }
            else
            {
                dgvCart.CurrentCell = dgvCart[icolumn + 1, irow];
            }
            return true;
        }
        else
        {
            return base.ProcessCmdKey(ref msg, keyData);
        }
    }
    catch (InvalidOperationException ex)
    {
        return false;
    }
    catch(NullReferenceException ex)
    {
        return false;
    }
}