C#导出Excel

导出EXCEL是经常用到的功能，之前接触过，最近又再次用到了，就总结下！
将以下方法写在Action里就好。

public ActionResult OutExcel()        {            string whereStr = "";            whereStr += string.Format("***");            IList<LLM.Model.****> List = BLL.GetModelList(whereStr);            string strHtml = "<meta http-equiv='content-type' content='application/ms-excel; charset=GB2312'/><table><tr>";            strHtml += "<td>***</td>" + "<td>***</td>" + "<td>***</td>" + "<td>***</td></td></tr><tr>";            foreach (LLM.Model.T_Base_Order model in orderList)            {                strHtml += "<td>" + model.***+ "</td>";                strHtml += "<td>" + model.***+ "</td>";                strHtml += "<td>" + model.***+ "</td>";                strHtml += "</tr>";            }            strHtml += "</table>";            strHtml = HttpUtility.HtmlDecode(strHtml);//Html解码            byte[] b = System.Text.Encoding.Default.GetBytes(strHtml);//字串转byte阵列            string filename = "***.xls";//文件名字            return File(b, "application/ms-excel", filename);//输出档案给Client端        }

比较简单的比特流转换Excel方法，通过浏览器解码，简单好用。