excel 导出

HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
                HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
                HttpContext.Current.Response.Charset = "Utf-8";
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("HuoHuaNianTongJi.xls", System.Text.Encoding.UTF8));
                HttpContext.Current.Response.Write(strTable);
                HttpContext.Current.Response.End();