HEGII.ss.mes.check/wwwroot/main/excel/excelRW.ashx

<%@ WebHandler Language="C#" Class="excelRW" %>

using System;
using System.Web;
using NPOI.SS.UserModel;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

public class excelRW : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/html";

        ExcelFile excel = new ExcelFile("template.xls");
        excel.GetWorkbook.GetSheet("封面").GetRow(14).GetCell(6).SetCellValue("东科商标");
        excel.GetWorkbook.GetSheet("内容").GetRow(1).GetCell(15).SetCellValue("东科检验项目");
        excel.GetWorkbook.GetSheet("内容").GetRow(1).GetCell(23).SetCellValue("东科检验结果");
        excel.SaveAs("export.xls");
        context.Response.Write("文件写入成功！<a href='export.xls'>点击下载</a>");
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }

}