关于导出Excel的疑惑

protected void buttonDaoChu_Click(object sender, EventArgs e)
    {
        StringWriter sw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(sw);
        //rep.RenderControl(hw);
        this.Repeater1.RenderControl(hw);
        Response.Clear();
        Response.ContentType = "application/vnd.ms-excel";
        Response.Charset = "";
        Repeater1.Page.EnableViewState = true;
        Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + HttpUtility.UrlEncode("驾驶员信息(" + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ").xls", System.Text.Encoding.UTF8) + "\"");
        string html = "<html><head><meta http-equiv=Content-Type content=\"text/html;";
        html += "charset=UTF8\"><title> adsf</title></head><body><table><tr><td>序号</td>";
        html += "<td>单位</td><td>部门</td><td>姓名</td><td>性别</td><td>职务</td>";
        html += "<td>准驾车型</td><td>终止日期</td><td>驾驶员状态</td><td>出生日期</td>";
        Response.Write(html);
        Response.Write(sw.ToString());
        Response.Write("</table></body></html>");
        Response.End();
    }我从Repeater导出Excel，怎么运行到this.Repeater1.RenderControl(hw); 就报错 类型“LinkButton”的控件“repeater1_lkbOne”必须放在具有 runat=server 的窗体标记内。 Form里我有写runat="server"啊  怎么就是报错呢