如何使用嵌套中继器在asp.net webform中显示母公司和子公司列表以及可选择的复选框

<asp:Repeater ID="rptCompanies" runat="server" OnItemDataBound="rptCompanies_ItemDataBound">
    <ItemTemplate>
        <h3><%# Eval("CompanyName") %></h3>
        <asp:CheckBoxList ID="chkSubCompanies" runat="server"></asp:CheckBoxList>
    </ItemTemplate>
</asp:Repeater>
<asp:Button ID="btnSubmit" runat="server" Text="提交" OnClick="btnSubmit_Click" />

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        // 绑定母公司数据源
        rptCompanies.DataSource = GetParentCompanies();
        rptCompanies.DataBind();
    }
}

protected void rptCompanies_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        // 获取当前母公司数据
        DataRowView rowView = (DataRowView)e.Item.DataItem;
        int parentCompanyId = Convert.ToInt32(rowView["CompanyId"]);

        // 获取当前复选框列表控件
        CheckBoxList chkSubCompanies = (CheckBoxList)e.Item.FindControl("chkSubCompanies");

        // 绑定子公司数据源
        chkSubCompanies.DataSource = GetSubCompanies(parentCompanyId);
        chkSubCompanies.DataTextField = "CompanyName";
        chkSubCompanies.DataValueField = "CompanyId";
        chkSubCompanies.DataBind();
    }
}

protected void btnSubmit_Click(object sender, EventArgs e)
{
    // 遍历所有中继器项，获取用户选择的子公司
    foreach (RepeaterItem item in rptCompanies.Items)
    {
        if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem)
        {
            CheckBoxList chkSubCompanies = (CheckBoxList)item.FindControl("chkSubCompanies");

            // 处理用户选择的子公司
            foreach (ListItem listItem in chkSubCompanies.Items)
            {
                if (listItem.Selected)
                {
                    int subCompanyId = Convert.ToInt32(listItem.Value);
                    // 进行相应的处理，如保存到数据库
                }
            }
        }
    }
}

// 获取母公司数据源
private DataTable GetParentCompanies()
{
    // 从数据库或其他数据源获取母公司数据
    // 返回一个DataTable对象，包含母公司的CompanyId和CompanyName字段
}

// 获取子公司数据源
private DataTable GetSubCompanies(int parentCompanyId)
{
    // 根据母公司Id从数据库或其他数据源获取子公司数据
    // 返回一个DataTable对象，包含子公司的CompanyId和CompanyName字段
}