GridView模版列中根据数据动态添加RadioButtonList项

aspx

                    <ItemTemplate>
                        <asp:HiddenField ID="hditem" runat="server" Value='<%# Eval("item") %>' />
                        <asp:RadioButtonList ID="rblidea" runat="server" RepeatDirection="Horizontal" RepeatLayout="Flow">
                            <asp:ListItem Value="1">同意</asp:ListItem>
                            <asp:ListItem Value="0">不同意</asp:ListItem>
                        </asp:RadioButtonList>
                    </ItemTemplate>

cs:

        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            int strid = e.Row.RowIndex;
            RadioButtonList rbliea = (RadioButtonList)e.Row.FindControl("rblidea");

            Button btnSubVise = (Button)e.Row.FindControl("btnSubVise");
            HtmlInputButton hReSubVise = (HtmlInputButton)e.Row.FindControl("ReSubVise");

            if (rbliea != null)
            {
                if (((HiddenField)e.Row.FindControl("hditem")).Value == "3")
                {
                    //rbliea.Items.Insert(2, "需客户核准");
                        rbliea.Items.Insert(2, new ListItem("需客户核准", "2"));
                    btnSubVise.Visible = false;
                    hReSubVise.Visible = false;
                }
            }

        }