asp.net中怎么把Repeater中的数据导入到Excel里

Question

string excelname = "excel文件名";
            HttpContext.Current.Response.Charset = "GB2312";
            HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
            HttpContext.Current.Response.ContentType = "application/ms-excel";
            HttpContext.Current.Response.AppendHeader("Content-disposition", "attachment;filename=" + excelname + ".xls");
            Repeater1.Page.EnableViewState = false;
            StringWriter sw = new StringWriter();
            HtmlTextWriter tw = new HtmlTextWriter(sw);
            Repeater1.RenderControl(tw);
            HttpContext.Current.Response.Write(sw.ToString());
            HttpContext.Current.Response.End();