c# mvc FileResult 导出excel

后台代码

public FileResult ExportExcel()        {            var sbHtml = new StringBuilder();            sbHtml.Append("<table border='1' cellspacing='0' cellpadding='0'>");            sbHtml.Append("<tr>");            var lstTitle = new List<string> { "编号", "姓名", "年龄", "创建时间" };            foreach (var item in lstTitle)            {                sbHtml.AppendFormat("<td style='font-size: 14px;text-align:center;background-color: #DCE0E2; font-weight:bold;' height='25'>{0}</td>", item);            }            sbHtml.Append("</tr>");            for (int i = 0; i < 1000; i++)            {                sbHtml.Append("<tr>");                sbHtml.AppendFormat("<td style='font-size: 12px;height:20px;'>{0}</td>", i);                sbHtml.AppendFormat("<td style='font-size: 12px;height:20px;'>屌丝{0}号</td>", i);                sbHtml.AppendFormat("<td style='font-size: 12px;height:20px;'>{0}</td>", new Random().Next(20, 30) + i);                sbHtml.AppendFormat("<td style='font-size: 12px;height:20px;'>{0}</td>", DateTime.Now);                sbHtml.Append("</tr>");            }            sbHtml.Append("</table>");            //第一种:使用FileContentResult            byte[] fileContents = Encoding.Default.GetBytes(sbHtml.ToString());            return File(fileContents, "application/ms-excel", "fileContents.xls");            //第二种:使用FileStreamResult            var fileStream = new MemoryStream(fileContents);            return File(fileStream, "application/ms-excel", "fileStream.xls");            //第三种:使用FilePathResult            //服务器上首先必须要有这个Excel文件,然会通过Server.MapPath获取路径返回.            var fileName = Server.MapPath("~/Files/fileName.xls");            return File(fileName, "application/ms-excel", "fileName.xls");        }

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