取消选择后如何使用ASP RadioButtonList回发OnSelectedIndexChanged？

<asp:RadioButtonList ID="RadioButtonList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="RadioButtonList1_SelectedIndexChanged">
    <asp:ListItem Text="Option 1" Value="1"></asp:ListItem>
    <asp:ListItem Text="Option 2" Value="2"></asp:ListItem>
    <asp:ListItem Text="Option 3" Value="3"></asp:ListItem>
</asp:RadioButtonList>

protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
    // 处理选项更改事件
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        // 在页面加载时取消选择
        RadioButtonList1.ClearSelection();
    }
}

protected void Page_PreRender(object sender, EventArgs e)
{
    // 在页面渲染之前手动触发PostBack
    if (RadioButtonList1.SelectedIndex == -1)
    {
        ScriptManager.RegisterStartupScript(this, GetType(), "PostBack", ClientScript.GetPostBackEventReference(RadioButtonList1, ""), true);
    }
}