利用 NUget包 EPPlus 实现数据导出到Excel（适用于MVC）

aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAvoAAABpCAIAAADEEBBGAAAJdElEQVR4nO3cy2ob5wLA8TxKnqTrrrPy/jxBn8DrHCKSRQJdadFNMMbgjaCmZ2FSI6luTI9bK5TD0cK3qoKAEB4hD3iULuSLLiNpdLe//H50U2U0l09C398zIz37AgAQtGfr3gEAgOWSOwBA4OQOABA4uQMABE7uAACBkzsAQODkDgAQOLkDAARO7gAAgZM7AEDg5A4AEDi5AwAETu4AAIFbZO50Op1Op5MkSZIkNwAAc+t2Rbcx1pw73cq5ubmJ47jdbrdarSiKrgAA5hBFUavVarfbcRx302e26FlA7nQ6nZubm8+fP//2228fP37cBwCYW7lcPj4+/uuvv+r1eqPRiKKoGz0zFM+8udNtndPT04ODg3UPCwAQoD///LNardZqtWazeX19PUPxzJs7SZJ8/vxZ6wAAy/P7779XKpWLi4tmsxnHcZIkq8ud7qmdP/74Y92DAACE7OjoaH9/v1Kp1Gq1KIqmPcEzb+7EcVwul+/35sWLF88BAOb27bff3gfGwcHBzs5OsVisVquNRiOO49XlTpIk7Xa7N77WPTIAQDh6GyOfz+/t7Z2cnNTr9Xa7PdX1rHlzp9VqyR0AYBl6G+Pdu3e7u7tHR0eXl5etVmt1uXNzcxNFkdwBAJahtzHevHmzvb1dLpfPz8+7t++sLneurq7kDgCwDL2Nkcvltra2SqXS6enp1dWV3AEAQjCQO+/fvy8Wi3IHAAhHb2O8evVK7gAAoZE7AEDg5A4AEDi5AwAETu4AAIGTOwBA4OQOABA4uQMABE7uAACBkzsAQODkDgAQOLkDAARO7gAAgZM7AEDg5A79NvKHZwMKmzMt9ChtFp7Qzq5Nd5R6HeY31r1TAHOQO/STO8gdIDiB5E7K9DvwEX23xMBEN+LhRRieMlZQBguezTOtbr5tTn7pFuqp5k76MA0cS6axnHbAu8vLHeBpCzp3eieD+yX6Zrr0RxdD7mSSaR5fnK8wd2ZZaGjLcgd42oLKnf6P5NvcuP0M38gfnh0eHvZ/qG8Wzs4OC4XDuwc3C0uZCEdNsT2P97ZR6i4MTVKpB5thFhtYcvw0trLcGffS9S43aW6eNE4pO5u2scybG3jdNgtpQ9o35DOOU6boyDSWWQd8wpbTXvX0w5/8ogAsXcC50//gRv7w7DCfL/R+RG8Wzs4O85v53txZxqfxhNzJD/25Pbj99JhJmbNTDc5049aTcc+nX2ikyS/dqMMbepVGnLfo27OBnU2fy+faXP+Caaua5e01c+4MPZhpocn/lDl3Jr95AZbvK8udjc2e3unWzsbGQ+487/twXvoloYdt3e/57RSa9rf34PM3NlLmpvHpsZE/TJn7xxzo48mdvgXGjFLKqvIjc2fU2Ygsmxu66+u+fgbLoveJt49MP1hPNnemePMCLE+wuXM3+dw9dps7zx9657Z2nvfnTtdio2dC7qRdbJquSiZvasbF15I7gy9dpifd7sXEEycPO9tdR6bdTtncmNNCA+2a9taa/vxOljNX2cZy2gFfSO44mwOsWVC5M242uMud+4/ku9pJzZ3Btc53dSvDvTvjH+w9vAXcbJN98flyJ9PVnskvXYrhKTjrgfddQMw6TqPqKr0Begt7lKln/ylyZ8JS0w74vBezsr95AZYn3NxJOVvffWgjf3jWvWu55//HTD8P6571L9S5cyftENN3ZvKsP9VP5qwnd9InxfG/BTNd7mSYfcdvblwDLDF3Ml3MmjCWmQc8w6FmvFU5643fAEsTVO6M+9R+yJ3Bc/dP4OzOiL1KWWjss4dvHHmUF7NGbWHsBZkpz+5sjrvIkmFz2XNnQSc0Zr93Z6aFJi8/Ve4MrEzxACv3NebOwNLrvndn2ty53+f0m2xHPztlMnoSuZNyC8wi7t0Zvtl4+s2lvnb3y2XcpUyeQu5kPF4/5AOswVeZOynPXeM3sybmzmZhxD0ao3/hJG3Xh580+Xv3jyJ3RvxyTPpkmzKg+dGZkjaQ021u8Dt1fWsbdQ/wRr4w7WT/6HJn4J026kzoNG9egOWRO725s9Df3Rn9Uzh3H/9T5M641UzaapZ7Scaubd0Xs8b9qFDKt7zHLJGys4PZknlzw1u7/V2ntC89jd2n7MOUaZdWkzvDw5Ry+FO+eQGWRu4M5M7iPoYXljvPUya7cbs5uOERQXD78N3Sjzh3nvcfU3dLo86cjDn6ETubcvYm6+Z6luv72t/onZ91qB5f7vTv0/1vO4w8DzTf8QPMJ5DcgUdgip/yAWCV5A7MZOgGHD+oB/BoyR2YSfrlJXfgAjxGcgdmNBg8UgfgsZI7AEDg5A4AEDi5AwAETu4AAIGTOwBA4OQOABA4uQMABE7uAACBkzsAQODkDgAQOLkDAARO7gAAgZM7AEDg5A4AEDi5AwAETu4AAIGTOwBA4OQOABA4uQMABE7uAACB622MXC63ztwpl8v3u/LNN9+se2QAgBC8ePHiPjAODg5yudzW1lapVFpD7kRRdHx8vA8AsDS//PLLmzdvtre3y+Xy+fl5FEWry50kSVqt1tnZ2boHAQAIWaFQePfu3e7u7tHR0eXlZavVSpJkdbnTbrfr9fqnT5/WPQ4AQJg+fPjw8uXLfD6/t7d3cnJSr9fb7fbqcqfT6cRx3Gg0qtXqp0+ffv3113UPCAAQiJ9//rlUKv30008vX778/vvvd3Z2isVitVptNBpxHHc6ndXlTvf2nVqtVqlU9vf3d3Z28vn827dvX79+ncvlXgEAzCSXy71+/frt27f5fH5nZ2d/f79Sqfz999/dG3dWlztfvnxJkiSO42azeXFxUalUisXijz/+uLu7u729vbW19R4AYCZbW1vb29u7u7t7e3vFYrFSqVxcXDSbzTiOp7qStYDc6Z7gub6+bjabtVqtWq2enJx8/PixXC6XSqUiAMBMSqVSuVw+Ojo6OTmpVqu1Wq3ZbF5fX097amcBuXNfPHEcR1HUaDTq9frl5eX5+fkpAMAczs/PLy8v6/V6o9GIoiiO4xlaZzG50y2eJEm60dNut1utVhRFVwAAc4iiqNVqtdvtbugkSTJD6ywsd+6jp9s93fQBAJhTtyu6jTFzoiwydwAAHiG5AwAETu4AAIGTOwBA4OQOABA4uQMABE7uAACBkzsAQODkDgAQOLkDAARO7gAAgZM7AEDgFpA7hR/+8+y7/v/+/f//zb9eAIBFWODZndq/vjsuLG51D/57/OyH2jJWDAB8Df4BEoO8xWC+fH4AAAAASUVORK5CYII=" alt="" width="315" height="43" />

第一步:为项目安装Epplus Nuget包。

Install-Package EPPlus 

第二步：在data项目中新建Repository，命名为ExcelWriter.cs.

将以下代码粘入，修改项目引用名字。

using System;
using OfficeOpenXml;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;

namespace ****.Data.Repositories
{
    public class ExcelWriter<TEntity>  where TEntity :class
    {
        public void WriteToFileStream(IEnumerable<TEntity> list, out MemoryStream memoryStream)
        {
            var pack = new ExcelPackage();
            var ws = pack.Workbook.Worksheets.Add("预约时间表");

            var col = ;
            var row = ;
            foreach (var propertyInfo in typeof(TEntity).GetProperties())
            {
                var displayName = propertyInfo.Name;
                ws.Cells[row, col].Value = displayName;
                col++;
            }

            row++;

            foreach (var coachBatchPayoutExcelModel in list)
            {

                for (var i = ; i < col; i++)
                {
                    var colName = ws.Cells[, i].Value.ToString();
                    ws.Cells[row, i].Value = coachBatchPayoutExcelModel.GetType().GetProperty(colName).GetValue(coachBatchPayoutExcelModel, null);
                }
                row++;
            }

            foreach (var propertyInfo in typeof(TEntity).GetProperties())
            {
                var attribute = propertyInfo.GetCustomAttributes(typeof(DisplayNameAttribute), true).Cast<DisplayNameAttribute>().SingleOrDefault();
                if (attribute != null)
                {
                    ws.Cells.First(item => item.GetValue<string>() == propertyInfo.Name).Value = attribute.DisplayName;
                }
            }
            ws.Column().Style.Numberformat.Format = "yyyy年MM月dd日";
            ws.Column().Width = ;
            ws.Column().Width = ;
            ws.Column().Width = ;
            ws.Column().Width = ;
            ws.Column().Width = ;
            ws.Column().Width = ;
            memoryStream = new MemoryStream(pack.GetAsByteArray());
        }
    }
}

以上为一泛型，如何使用请参考以下使用样例。

  #region 下载数据

            Mapper.CreateMap<OnlineBookingInfo, ExcelModel>();
            var excels = Mapper.Map<List<OnlineBookingInfo>, List<ExcelModel>>(onlineBookingInfos);

            MemoryStream memoryStream;
            var excelWriter = new ExcelWriter<ExcelModel>();
            excelWriter.WriteToFileStream(excels, out memoryStream);
            return File(memoryStream, "application/vnd.ms-excel", "郑州科技馆预约参观名单" + DateTime.Now.Date.ToString("yyyy_MM_dd") + ".xls");
  #endregion

先将需要导出的数据使用mapper，映射到新的实体类型（只需要导出的实体，此处的可以为新建）

excel的title为新建实体的dispalyname的名字。

使用的时候先

MemoryStream memoryStream;

var excelWriter = new ExcelWriter<ExcelModel>();

然后

excelWriter.WriteToFileStream(excels, out memoryStream);

最后输出

return File(memoryStream, "application/vnd.ms-excel", "郑州科技馆预约参观名单" + DateTime.Now.Date.ToString("yyyy_MM_dd") + ".xls");