用EPPlus導入導出數據到excel

項目上中要用到將數據庫中所有表導出為Excel，以及將Excel數據導入數據庫中的操作，使用EPPlus組件，編寫以下兩個函數。

using OfficeOpenXml;
using OfficeOpenXml.Table;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

    public class ExcelHelper
    {

        #region 保存數據列表到Excel（泛型）+void SaveToExcel<T>(IEnumerable<T> data, string FileName, string OpenPassword = "")
        /// <summary>
        /// 保存數據列表到Excel（泛型）
        /// </summary>
        /// <typeparam name="T">集合數據類型</typeparam>
        /// <param name="data">數據列表</param>
        /// <param name="FileName">Excel文件</param>
        /// <param name="OpenPassword">Excel打開密碼</param>
        public static void SaveToExcel<T>(IEnumerable<T> data, string FileName, string OpenPassword = "")
        {
            FileInfo file = new FileInfo(FileName);
            try
            {
                using (ExcelPackage ep = new ExcelPackage(file, OpenPassword))
                {
                    ExcelWorksheet ws = ep.Workbook.Worksheets.Add(typeof(T).Name);
                    ws.Cells["A1"].LoadFromCollection(data, true, TableStyles.Medium10);

                    ep.Save(OpenPassword);
                }
            }
            catch (InvalidOperationException ex)
            {
                Console.WriteLine(ex.Message);
            }
        } 
        #endregion

        #region 從Excel中加載數據（泛型）+IEnumerable<T> LoadFromExcel<T>(string FileName) where T : new()
        /// <summary>
        /// 從Excel中加載數據（泛型）
        /// </summary>
        /// <typeparam name="T">每行數據的類型</typeparam>
        /// <param name="FileName">Excel文件名</param>
        /// <returns>泛型列表</returns>
        private static IEnumerable<T> LoadFromExcel<T>(string FileName) where T : new()
        {
            FileInfo existingFile = new FileInfo(FileName);
            List<T> resultList = new List<T>();
            Dictionary<string, int> dictHeader = new Dictionary<string, int>();

            using (ExcelPackage package = new ExcelPackage(existingFile))
            {
                ExcelWorksheet worksheet = package.Workbook.Worksheets[1];

                int colStart = worksheet.Dimension.Start.Column;  //工作區開始列
                int colEnd = worksheet.Dimension.End.Column;       //工作區結束列
                int rowStart = worksheet.Dimension.Start.Row;       //工作區開始行號
                int rowEnd = worksheet.Dimension.End.Row;       //工作區結束行號

                //將每列標題添加到字典中
                for (int i = colStart; i <= colEnd; i++)
                {
                    dictHeader[worksheet.Cells[rowStart, i].Value.ToString()] = i;
                }

                List<PropertyInfo> propertyInfoList = new List<PropertyInfo>(typeof(T).GetProperties());

                for (int row = rowStart + 1; row < rowEnd; row++)
                {
                    T result = new T();

                    //為對象T的各屬性賦值
                    foreach (PropertyInfo p in propertyInfoList)
                    {
                        try
                        {
                            ExcelRange cell = worksheet.Cells[row, dictHeader[p.Name]]; //與屬性名對應的單元格

                            if (cell.Value == null)
                                continue;
                            switch (p.PropertyType.Name.ToLower())
                            {
                                case "string":
                                    p.SetValue(result, cell.GetValue<String>());
                                    break;
                                case "int16":
                                    p.SetValue(result, cell.GetValue<Int16>());
                                    break;
                                case "int32":
                                    p.SetValue(result, cell.GetValue<Int32>());
                                    break;
                                case "int64":
                                    p.SetValue(result, cell.GetValue<Int64>());
                                    break;
                                case "decimal":
                                    p.SetValue(result, cell.GetValue<Decimal>());
                                    break;
                                case "double":
                                    p.SetValue(result, cell.GetValue<Double>());
                                    break;
                                case "datetime":
                                    p.SetValue(result, cell.GetValue<DateTime>());
                                    break;
                                case "boolean":
                                    p.SetValue(result, cell.GetValue<Boolean>());
                                    break;
                                case "byte":
                                    p.SetValue(result, cell.GetValue<Byte>());
                                    break;
                                case "char":
                                    p.SetValue(result, cell.GetValue<Char>());
                                    break;
                                case "single":
                                    p.SetValue(result, cell.GetValue<Single>());
                                    break;
                                default:
                                    break;
                            }
                        }
                        catch (KeyNotFoundException ex)
                        { }
                    }
                    resultList.Add(result);
                }
            }
            return resultList;
        } 
        #endregion

 

    }