如何获取repeater中创建的按钮的id ?并从MasterPage的Contentpageholder中获取它?这是我的代码

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Button btn = (Button)e.Item.FindControl("btnButton");
        btn.ID = "btnButton_" + e.Item.ItemIndex;
    }
}

protected void Page_Load(object sender, EventArgs e)
{
    foreach (Control control in ContentPlaceHolder1.Controls)
    {
        if (control is Repeater)
        {
            Repeater repeater = (Repeater)control;
            foreach (RepeaterItem item in repeater.Items)
            {
                Button btn = (Button)item.FindControl("btnButton_" + item.ItemIndex);
                if (btn != null)
                {
                    // 使用获取到的按钮ID进行相应的操作
                    string buttonId = btn.ID;
                    // ...
                }
            }
        }
    }
}