Set focus to next cell when pressing enter key in datagridview control

private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
        {

            if (e.KeyCode == Keys.Enter)
            {
                e.SuppressKeyPress = true;
                int iColumn = dataGridView1.CurrentCell.ColumnIndex;
                int iRow = dataGridView1.CurrentCell.RowIndex;
                if (iColumn == dataGridView1.Columns.Count - 1)
                    dataGridView1.CurrentCell = dataGridView1[0, iRow + 1];
                else
                    dataGridView1.CurrentCell = dataGridView1[iColumn + 1, iRow];

            }
        }

<script type="text/javascript">
    $(document).ready(function () {

        var inputs = $(':input').keypress(function (e) {
            if (e.which == 13) {
                e.preventDefault();
                var nextInput = inputs.get(inputs.index(this) + 1);
                if (nextInput) {
                    nextInput.focus();
                }
            }
        });

             });
</script>

<asp:textbox id="TextBox1" runat="server" xmlns:asp="#unknown"></asp:textbox>
<asp:textbox id="TextBox2" runat="server" xmlns:asp="#unknown"></asp:textbox>
<asp:textbox id="TextBox3" runat="server" xmlns:asp="#unknown"></asp:textbox>