一直使用excel com 接口进行excel 操作，最近一次因为权限折腾了个够呛，果断放弃，使用 NPOI

FileStream file = new FileStream(url, FileMode.Open, FileAccess.Read);            HSSFWorkbook hssfworkbook = new HSSFWorkbook(file);            HSSFSheet sheet1 = hssfworkbook.GetSheet("Sheet1") as HSSFSheet;            sheet1.GetRow(1).Cells[5].SetCellValue (Convert.ToDateTime(Date1).ToString("yyyy年MM月dd日") + "-" + Convert.ToDateTime(Date2).ToString("yyyy年MM月dd日"));            sheet1.ForceFormulaRecalculation = true;            string filePath=context.Server.MapPath("~/Resource/books/" + RuleTypeID + ".xls");            FileStream newfile = new FileStream(filePath, FileMode.Create); hssfworkbook.Write(newfile);            file.Close();            newfile.Close();string fileName = RuleTypeID + ".xls";//客户端保存的文件名FileInfo fileInfo = new FileInfo(filePath);context.Response.Clear();context.Response.ClearContent();context.Response.ClearHeaders();context.Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);context.Response.AddHeader("Content-Length", fileInfo.Length.ToString());context.Response.AddHeader("Content-Transfer-Encoding", "binary");context.Response.ContentType = "application/octet-stream";context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");context.Response.WriteFile(fileInfo.FullName);context.Response.Flush();context.Response.End();

 

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