asp.net MVC NPOI导出excel通用

一、创建一个类文件添加

    public class ExportToExcelColumn
    {
        public ExportToExcelColumn(string _Columnnames,string _EnglishColumnnames)
        {
            Columnnames = _Columnnames;
            EnglishColumnnames = _EnglishColumnnames;
        }
        public ExportToExcelColumn(string _Columnnames,string _EnglishColumnnames,List<EnumName> _EnumValueList)
        {
            Columnnames = _Columnnames;
            EnglishColumnnames = _EnglishColumnnames;
            EnumValueList = _EnumValueList;
            if(_EnumValueList!=null&& _EnumValueList.Count()>0)
            {
                IsEnum = true;
            }
        }
        public string Columnnames { get; set; }
        public string EnglishColumnnames { get; set; }

        public bool IsEnum { get; set; } = false;

        public List<EnumName> EnumValueList  { get; set; }

}

    public class EnumName
    {
        public string EnumKey { get; set; }
        public string EnumValue { get; set; }
    }

二、添加调用方法

 #region
        /// <summary>
        /// 
        /// </summary>
        /// <param name="list">数据</param>
        /// <param name="saveFileName">保存名</param>
        /// <param name="Columnnames">列名</param>
        /// <param name="IsSortCol">是否添加排序列</param>
        /// <returns></returns>
        public ActionResult ExportToExcel(List<dynamic> list,string saveFileName,List<ExportToExcelColumn> Columnnames,bool IsSortCol)
        {
            //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("Sheet1");

            //给sheet1添加第一行的头部标题

            NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow(0);
            //存储列名
            if (Columnnames != null)
            {
                int iStart = 0;
                if (IsSortCol)
                {
                    row1.CreateCell(iStart).SetCellValue("序号");
                    iStart = 1;
                }
                for (int i = 0; i < Columnnames.Count; i++)
                {
                    row1.CreateCell(i + iStart).SetCellValue(Columnnames[i].Columnnames);
                }
                
                //存储值
                if (list != null)
                {
                    for (int i = 0; i < list.Count; i++)
                    {
                        NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1);
                        if (IsSortCol)
                        {
                            rowtemp.CreateCell(0).SetCellValue(i + 1);
                        }
                        for (int m = 0; m < Columnnames.Count; m++)
                        {
                            string value = "";
                            bool IsEnum = Columnnames[m].IsEnum;
                            List<EnumName> EnumValueList= Columnnames[m].EnumValueList;

                            value = list[i][Columnnames[m].EnglishColumnnames].ToString();

                            if(IsEnum)
                            {
                                EnumName enumName = EnumValueList.FirstOrDefault(t=>t.EnumKey== value);
                                if (enumName != null)
                                {
                                    value = enumName.EnumValue;
                                }
                                else
                                {
                                    enumName = EnumValueList.FirstOrDefault(t => t.EnumKey == "");
                                    if (enumName != null)
                                    {
                                        value = enumName.EnumValue;
                                    }
                                }
                            }
                            rowtemp.CreateCell(m + iStart).SetCellValue(value);
                        }

                    }
                }
            }
            // 写入到客户端 
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            book.Write(ms);
            ms.Seek(0,SeekOrigin.Begin);
            return File(ms,"application/vnd.ms-excel",saveFileName + ".xls");

        }

        #endregion

  三、自定义导出列

   List<ExportToExcelColumn> Columnnames = new List<ExportToExcelColumn>();
   Columnnames.Add(new ExportToExcelColumn("编号","code"));
   Columnnames.Add(new ExportToExcelColumn("名称","name"));

     List<EnumName> EnumValueList = new List<EnumName>();
     EnumValueList.Add(new EnumName() { EnumKey = "0",EnumValue = "成功" });
     //默认值
     EnumValueList.Add(new EnumName() { EnumKey = "",EnumValue = "失败" });

     Columnnames.Add(new ExportToExcelColumn("状态","status",EnumValueList));

四、调用导出方法

        /// <summary>
        /// 
        /// </summary>
        /// <param name="list">数据</param>
        /// <param name="fileName">保存名</param>
        /// <param name="Columnnames">列名</param>
        /// <param name="IsSortCol">是否添加排序列</param>
        /// <returns></returns> return ExportToExcel(list,filename,Columnnames,true);