//导出到Excel --- 全部导出，可以设置一些隐藏进行导出

protected void btnExport_Click(object sender, EventArgs e)
    {
        div_table.InnerHtml = hfdHtml.Value;//将页面内容重新放回去，因为后台按钮会冲掉已经生成的页面
        btnExport.Visible = false;//导出按钮设置为不可见
        string strFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
        System.Web.HttpContext.Current.Response.Clear();
        System.Web.HttpContext.Current.Response.ClearHeaders();
        System.Web.HttpContext.Current.Response.Buffer = false;
        System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
        System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + strFileName);
    }

protected void btnExport_Click(object sender, EventArgs e)

    {

        divAdd.Visible = false;//需要隐藏的div

        string strFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".doc";

        Response.Buffer = true;

        System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + strFileName);

        Response.ContentType = "application/ms-word";

        HttpContext.Current.Response.Charset = "UTF-8";

        this.EnableViewState = false;//初始化HtmlWriter

        System.IO.StringWriter writer = new System.IO.StringWriter();

        System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(writer);

        this.RenderControl(htmlWriter);//输出

        HttpContext.Current.Response.Write(writer.ToString());

        HttpContext.Current.Response.End();

    }