Button btn = new Button();
            this.div2.Controls.Add(btn);
            btn.Text = ds.Tables[0].Rows[i][0].ToString();
            btn.Style.Add("border", "white 2px solid");
            btn.Attributes.Add("onclick", "<script>btn_onclick(this)</script>");

    <form id="form1" runat="server">
    <div id="divContainer" runat="server">
    </div>

    <script type="text/javascript">
        function test(id) {
            alert(id);
        }
    </script>

    </form>

------解决方案--------------------
探讨

引用:

HTML code
<form id="form1" runat="server">
<div id="divContainer" runat="server">
</div>
<script type="text/javascript">
function test(id) {
alert(id);
}……
如果是生成多个button……