C#导出Excel表格方法

using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.SS.Formula.Functions;
using System.Reflection;
using System.IO;

public class Exportmethod
    {
        /// <summary>
        /// 导出Excel表格
        /// </summary>
        /// <typeparam name="T">数据类型</typeparam>
        /// <param name="listEntity"></param>
        /// <returns></returns>
        public static byte[] Output<T>(List<T> listEntity) where T : class
        {
            Type entityType = (listEntity?.FirstOrDefault()).GetType();
            IWorkbook workbook = new XSSFWorkbook();
            ISheet sheet = workbook.CreateSheet("sheet");
            var scd = typeof(System.ComponentModel.DisplayNameAttribute);
            var entityProperties = entityType.GetProperties().Where(item => item.GetCustomAttribute(scd) != null).ToList();
            IRow Title = sheet.CreateRow(0);
            IRow rows = null;

　　　　　　　　
            for (int i = 0; i < listEntity.Count; i++)
            {
                var dbitem = listEntity[i];
                rows = sheet.CreateRow(i+1);
                for (int j = 0; j < entityProperties.Count; j++)
                {
                    var prop = entityProperties[j];
                    if (i == 0)
                    {
　　　　　　　　　　　　　　//表头赋值
                        var display = prop.GetCustomAttribute(scd) as System.ComponentModel.DisplayNameAttribute;
                        Title.CreateCell(j).SetCellValue(display.DisplayName);
                        
                    }
　　　　　　　　　　　　//表格数据
                    var value = prop.GetValue(dbitem)?.ToString();
                    rows.CreateCell(j).SetCellValue(value ?? "");
                }
            }

            using (MemoryStream ms = new MemoryStream())
            {
                workbook.Write(ms);
                return ms.GetBuffer();
            }
        }

下面是实体模型，需要在前面加DisplayName，这样做的意义是有多少就生成多少列

 /// <summary>
    /// 视图模型
    /// </summary>
    public class QueryListDataDto
    {
        /// <summary>
        /// ID
        /// </summary>
        [DisplayName("编号")]
        public int Id { get; set; }

        /// <summary>
        /// 名称
        /// </summary>
        [DisplayName("名称")]
        public string Name { get; set; }

        /// <summary>
        /// 说明
        /// </summary>
        [DisplayName("说明")]
        public string Description { get; set; }

条件：需要NPOI包