source/Repid.Utility/Helper/NpoiHelper.cs

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using CsvHelper;
using NPOI.HSSF.UserModel;
using NPOI.SS.Formula.Eval;
using NPOI.SS.UserModel;
using NPOI.SS.Util;
using System;
using System.Collections.Generic;
using System.Data;
using System.Dynamic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Web;

namespace Repid.Utility.Helper
{
    /// <summary>
    /// Nopi电子表格处理
    /// </summary>
    public static class NpoiHelper
    {
        #region Xls

        public static DataTable XlsToDataTable(string filePath, int sheetIndex)
        {
            string extName = Path.GetExtension(filePath);

            DataTable dt = new DataTable();

            if (extName.Equals(".xls") || extName.Equals(".xlsx"))
            {
                using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    HSSFWorkbook workbook = new HSSFWorkbook(file);

                    ISheet sheet = workbook.GetSheetAt(sheetIndex);

                    //列头
                    foreach (ICell item in sheet.GetRow(sheet.FirstRowNum).Cells)
                    {
                        dt.Columns.Add(item.ToString(), typeof(string));
                    }

                    //写入内容
                    System.Collections.IEnumerator rows = sheet.GetRowEnumerator();

                    while (rows.MoveNext())
                    {
                        IRow row = (HSSFRow)rows.Current;

                        if (row.RowNum == sheet.FirstRowNum)
                        {
                            continue;
                        }

                        DataRow dr = dt.NewRow();

                        foreach (ICell item in row.Cells)
                        {