部类“Button”的控件“replist_Button2_0”必须放在具有 runat=server 的窗体标记内。Repeater导出数据出错

类型“Button”的控件“replist_Button2_0”必须放在具有 runat=server 的窗体标记内。Repeater导出数据出错
protected void BtnPrint_Click(object sender, EventArgs e)
        {
            //定义文档类型、字符编码
            string title = "**统计表" + "_" + DateTime.Today.ToShortDateString();
            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "GB2312";

            string filename = "attachment;filename=" + System.Web.HttpUtility.UrlEncode(title, System.Text.Encoding.UTF8) + ".xls";
            Response.AppendHeader("Content-Disposition", filename);
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            //Response.ContentType指定文件类型 可以为application/ms-excel、application/ms-word、application/ms-txt、application/ms-html 或其他浏览器可直接支持文档
            Response.ContentType = "application/ms-excel";
            Response.Write("<meta http-equiv=Content-Type content="text/html; charset=GB2312">");

            this.EnableViewState =true;
            // 定义一个输入流
            System.IO.StringWriter os = new System.IO.StringWriter();
            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);

            this.replist.RenderControl(oHtmlTextWriter);
            //this 表示输出本页，你也可以绑定datagrid,或其他支持obj.RenderControl()属性的控件
            Response.Write(oStringWriter.ToString());
            Response.End();

        }


前台：
 <table id="table1" >
            <tr>
             <th>
                  &nbsp 活动名
                </th>
                 <th >
                  &nbsp  活动封面
                </th>
                <th>

                 &nbsp  组织者
                </th>
                <th>
                  &nbsp 目的地
                </th>
                <th>
                  &nbsp 活动结束时间
                </th>
                <th>
               &nbsp 操作
                </th>
            </tr>
            <asp:Repeater ID="replist" runat="server" OnItemCommand="replist_ItemCommand">
                <ItemTemplate>
                    <tr>
                        <td>
                           <%# Eval("name")%>
                        </td>
                        <td >
                           <img  style=" width:200px; height:150px;" src="//img.reader8.net/uploadfile/logo/<%#Eval("logo") %>" />
                        </td>
                        <td>
                            <%# Eval("zhuzhizhe")%>
                            <asp:Label ID="lblid" runat="server" Text='<%# Eval("lid")%>' Visible="False"></asp:Label>
                        </td>
                       <td>
                            <%# Eval("didian")%>

                           </td>
                         <td>
                            <%# Eval("edds").ToString().Split(' ')[0].ToString()%>
                           </td>
                        <td >
                           <a href="Addhd.aspx?lid=<%# Eval("lid")%>" id="yy" target="list">更改</a> 
                        <%--  <asp:LinkButton ID="lid" Text="预约" OnClick="yy_Click" runat="server"></asp:LinkButton>--%>
                           <asp:Button  class="btn1" ID="Button2" runat="server" Text="删除" CommandName="del" CommandArgument='<%# Eval("lid") %>'
                                OnClientClick="return confirm('确定删除吗？');" />
                             <asp:Button ID="dc"  runat="server" OnClick="BtnPrint_Click" Text="导出" class="btn1"/>
                        </td>
                  </tr>
                </ItemTemplate>
            </asp:Repeater> ASP 服务器控件
[解决办法]
  在页面中重写Page基类的VerifyRenderingInServerForm方法
     public override void VerifyRenderingInServerForm(Control control)
    {
        // Confirms that an HtmlForm control is rendered for
    }
参考http://www.cnblogs.com/zhangronghua/archive/2007/11/07/951899.html