C#从选项卡顺序中删除GridView命令字段链接

我有三列GridView，一列是模板字段textbox，另外两列是CommandFileds Insert、Delete。现在我想从CommandFields中删除制表符。 我只需要在文本框上添加标签。如果我试图将

TabIndex=“-1”

放在

CommandField

上，我会得到错误

                <asp:GridView ID="gvStavke" runat="server" BackColor="White"  AllowPaging="True" PageSize="20" TabIndex="-1" >
                    <Columns>
                        <asp:TemplateField HeaderText = "Unesi Cijenu">
                            <ItemTemplate>
                                <asp:TextBox ID="txtJedinicnaCijena" runat="server" Width="100px" >
                                </asp:TextBox>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:CommandField SelectText="IZMJENI" ShowSelectButton="True" />
                        <asp:CommandField DeleteText="IZBRIŠI" ShowDeleteButton="True" />

                    </Columns>
                </asp:GridView>