C# 批量发送文件

前两天要求做一个批量发送邮件

邮件内容是从excel中读取数据 然后发送

直接贴出代码

using HOSBS.Framework.Utility;
using NPOI.HSSF.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Net.Mail;
using System.Net;
using NPOI.SS.UserModel;
using NPOI.HSSF.Util;
using System.Drawing;
namespace HOSBS.Web.Admin.Areas.HOS.Controllers
{
    public class WorksController : Controller
    {
        //
        // GET: /HOS/Works/

        public ActionResult Index()
        {
            return View();
        }

        public string path = "~/exceldownload/";
        private string StorageRoot
        {
            get { return Path.Combine(Server.MapPath(path)); }
        }
        public ActionResult UploadFiles()
        {
            HttpPostedFileBase file = Request.Files["file1"];
            if (file != null)
            {

                Stream streamfile = file.InputStream;
                DataTable dt = new DataTable();
                var houzhuiname = Path.GetExtension(file.FileName);
                try
                {
                    if (houzhuiname == ".xls")
                    {
                        HSSFWorkbook hssfworkbook = new HSSFWorkbook(streamfile);
                        dt = ImExport(dt, hssfworkbook);
                        GetData(dt);
                    }
                    else
                    {
                        XSSFWorkbook hssfworkbook = new XSSFWorkbook(streamfile);
                        dt = ImExport(dt, hssfworkbook);
                        GetData(dt);
                    }
                    return Json(1);
                }
                catch { }
            }
            return Json(0);
        }
        #region 两种不同版本的操作excel
        /// <summary>
        /// Excel2007的版本，扩展名是.xlsx
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="hssfworkbook"></param>
        /// <returns></returns>
        private static DataTable ImExport(DataTable dt, XSSFWorkbook hssfworkbook)
        {
            NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0);
            System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
            for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++)
            {
                //dt.Columns.Add(Convert.ToChar(((int)'A') + j).ToString());]  
                dt.Columns.Add(sheet.GetRow(0).Cells[j].ToString());
            }
            while (rows.MoveNext())
            {
                XSSFRow row = (XSSFRow)rows.Current;
                DataRow dr = dt.NewRow();
                for (int i = 0; i < 19; i++)
                {
                    NPOI.SS.UserModel.ICell cell = row.GetCell(i);
                    if (cell == null)
                    {
                        dr[i] = null;
                    }
                    else
                    {
                        dr[i] = cell.ToString();
                    }
                }
                dt.Rows.Add(dr);
            }
            return dt;
        }
        /// <summary>
        /// Excel2003以前（包括2003）的版本
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="hssfworkbook"></param>
        /// <returns></returns>
        private static DataTable ImExport(DataTable dt, HSSFWorkbook hssfworkbook)
        {
            NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0);
            System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
            for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++)
            {
                dt.Columns.Add(sheet.GetRow(0).Cells[j].ToString());
                //dt.Columns.Add(Convert.ToChar(((int)'A') + j).ToString());
            }
            while (rows.MoveNext())
            {
                HSSFRow row = (HSSFRow)rows.Current;
                DataRow dr = dt.NewRow();
                for (int i = 0; i < 19; i++)
                {
                    NPOI.SS.UserModel.ICell cell = row.GetCell(i);
                    if (cell == null)
                    {
                        dr[i] = null;
                    }
                    else
                    {
                        dr[i] = cell.ToString();
                    }
                }
                dt.Rows.Add(dr);
            }
            return dt;
        }


        /// <summary>
        /// 生成excel
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public FileResult GetData(DataTable dt)
        {
            int flag = 0;
            foreach (DataRow item in dt.Rows)
            {
                DataTable dtresult = dt.Copy();
                dtresult.Rows.Clear();
                flag++;
                if (flag % 2 == 0)
                {
                    dtresult.Rows.Add(item.ItemArray);
                    NPOI.HSSF.UserModel.HSSFWorkbook book = CreateNewBook(dtresult);

                    if (!Directory.Exists(StorageRoot))
                    {
                        Directory.CreateDirectory(StorageRoot);
                    }
                    string strdate = DateTime.Now.ToString("yyyyMMddhhmmssffff");//获取当前时间  
                    var path = Path.Combine(StorageRoot, strdate + "Excel.xls");
                    // 写入到客户端   
                    using (FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write))
                    {
                        book.Write(fs);
                    }
                    var fullName = Path.Combine(StorageRoot, strdate);
                    SendMail(path, item[18].ToString());
                    dtresult.Rows.Clear();
                    flag = 0;
                }
                else
                {
                    dtresult.Rows.Add(item.ItemArray);
                }
            }
            return null;

        }
        //创建的excel文档 并且设置excel的style格式
        private static HSSFWorkbook CreateNewBook(DataTable dtresult)
        {
            //创建Excel文件的对象  
            NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
            //添加一个sheet  
            NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("工资条");
            //给sheet1添加第一行的头部标题  
            NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow(0);

            ICellStyle style = book.CreateCellStyle();
            style.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
            style.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
            style.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
            style.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
            ICellStyle style2 = book.CreateCellStyle();
            style2.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
            style2.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
            style2.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
            style2.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
            var newStyle = book.CreateCellStyle();
            newStyle.FillPattern = FillPattern.SolidForeground;
            newStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LightYellow.Index;
            newStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
            newStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
            newStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
            newStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
            IFont font1 = book.CreateFont();
            font1.FontName = "微软雅黑";
            font1.Boldweight = (short)FontBoldWeight.Bold;
            style.SetFont(font1);
            newStyle.SetFont(font1);
            var newStyle2 = book.CreateCellStyle();
            newStyle2.FillPattern = FillPattern.SolidForeground;
            newStyle2.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LightYellow.Index;
            newStyle2.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
            newStyle2.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
            newStyle2.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
            newStyle2.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
            //row1.RowStyle.FillBackgroundColor = "";  
            for (int i = 0; i < dtresult.Columns.Count - 1; i++)
            {
                sheet1.SetColumnWidth(i, 25 * 150);
                row1.CreateCell(i).SetCellValue(dtresult.Columns[i].ColumnName);
                row1.Cells[i].CellStyle = style;
                if (i == 17 || i == 9)
                {
                    row1.GetCell(i).CellStyle = newStyle;
                }
            }
            //将数据逐步写入sheet1各个行  
            for (int i = 0; i < dtresult.Rows.Count; i++)
            {
                NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1);
                for (int j = 0; j < dtresult.Columns.Count - 1; j++)
                {
                    rowtemp.CreateCell(j).SetCellValue(dtresult.Rows[i][j].ToString().Trim());
                    rowtemp.Cells[j].CellStyle = style2;
                    if (j == 17 || j == 9)
                    {
                        rowtemp.GetCell(j).CellStyle = newStyle2;
                    }
                }
            }
            return book;
        }

        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="datapath"></param>
        /// <param name="mailaddress"></param>
        public void SendMail(string datapath, string mailaddress)
        {
            var mailnAddress = SystemManager.ConfigInfo("mailnAddress");
            var mailPwd = SystemManager.ConfigInfo("mailPwd");
            var mainUserName = SystemManager.ConfigInfo("mainUserName");
            MailMessage mailObj = new MailMessage();
            mailObj.From = new MailAddress(mailnAddress); //发送人邮箱地址
            mailObj.To.Add(mailaddress);   //收件人邮箱地址
            mailObj.Subject = "工资条";    //主题
            mailObj.Body = "工资条";    //正文
            SmtpClient smtp = new SmtpClient();
            smtp.Host = "smtp.exmail.qq.com";         //smtp服务器名称
            smtp.UseDefaultCredentials = true;
            smtp.Credentials = new NetworkCredential(mainUserName, mailPwd);  //发送人的登录名和密码
            Attachment inline = new Attachment(datapath);
            mailObj.Attachments.Add(inline);
            smtp.Send(mailObj);
        }

        #endregion
    }
}

然后发送人的邮箱和密码就在配置文件中配置

    <!--发送人邮箱地址-->
    <add key="mailnAddress" value="*****.com"/>
    <!--发送人的登录名-->
    <add key="mainUserName" value="*****.com"/>
    <!--发送人的密码-->
    <add key="mailPwd" value="*****"/>

获取config键值

   public static string ConfigInfo(string key)
        {
            try
            {
                string Result =
                    ConfigurationManager.AppSettings[key].ToString();
                if (!string.IsNullOrEmpty(Result))
                {
                    return Result;
                }
            }
            catch (Exception)
            {
            }
            return "";
        }