使用NPOI 2.1.1读取EXCEL2003/2007返回DataTable

一，不借助插件读取Excel2003、2007：

            string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + path + ";" + "Extended Properties=‘Excel 12.0; HDR=Yes; IMEX=1‘";
            OleDbConnection conn = new OleDbConnection(strConn);
            conn.Open();
            string strExcel = "";
            OleDbDataAdapter myCommand = null;
            DataSet ds = null;
            strExcel = "select * from [sheet1$]";
            myCommand = new OleDbDataAdapter(strExcel, strConn);
            ds = new DataSet();
            myCommand.Fill(ds, "table1");
            return ds;

　　

二，使用NPOI 2.1.1读取EXCEL2003/2007

在使用NPOI 2.0.1读取Excel2007文档时，标准的日期格式2014/12/4 给读成了04-十二月-2014，不知道是我的人品差，还是版本bug，又不想手动去转换格式，试了下最新版本，解决了这问题。

调用方法就一句话：DataTable dt1 = ExcelNpoiHelper.ImportExcelAllToDt(file);

附ExcelNpoiHelper类。

using NPOI.HSSF.UserModel;
using NPOI.SS.Formula.Eval;
using NPOI.SS.UserModel;
using NPOI.SS.Util;
using NPOI.XSSF.UserModel;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;

namespace UploadValuationReport.excelhelper
{
    public class ExcelNpoiHelper
    {
        #region 从datatable中将数据导出到excel
        /// <summary>
        /// DataTable导出到Excel的MemoryStream
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        static MemoryStream ExportDt(DataTable dtSource, string strHeaderText)
        {
            HSSFWorkbook workbook = new HSSFWorkbook();
            HSSFSheet sheet = workbook.CreateSheet() as HSSFSheet;

            #region 右击文件 属性信息

            //{
            //    DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
            //    dsi.Company = "NPOI";
            //    workbook.DocumentSummaryInformation = dsi;

            //    SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
            //    si.Author = "文件作者信息"; //填加xls文件作者信息
            //    si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
            //    si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
            //    si.Comments = "作者信息"; //填加xls文件作者信息
            //    si.Title = "标题信息"; //填加xls文件标题信息
            //    si.Subject = "主题信息"; //填加文件主题信息
            //    si.CreateDateTime = DateTime.Now;
            //    workbook.SummaryInformation = si;
            //}

            #endregion

            HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
            HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
            dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

            //取得列宽
            int[] arrColWidth = new int[dtSource.Columns.Count];
            foreach (DataColumn item in dtSource.Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
            }
            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            int rowIndex = 0;

            foreach (DataRow row in dtSource.Rows)
            {
                #region 新建表，填充表头，填充列头，样式

                if (rowIndex == 65535 || rowIndex == 0)
                {
                    if (rowIndex != 0)
                    {
                        sheet = workbook.CreateSheet() as HSSFSheet;
                    }

                    #region 表头及样式

                    {
                        HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
                        headerRow.HeightInPoints = 25;
                        headerRow.CreateCell(0).SetCellValue(strHeaderText);

                        HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
                        headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                        HSSFFont font = workbook.CreateFont() as HSSFFont;
                        font.FontHeightInPoints = 20;
                        font.Boldweight = 700;
                        headStyle.SetFont(font);

                        headerRow.GetCell(0).CellStyle = headStyle;

                        sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
                        //headerRow.Dispose();
                    }

                    #endregion

                    #region 列头及样式

                    {
                        HSSFRow headerRow = sheet.CreateRow(1) as HSSFRow;

                        HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
                        headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                        HSSFFont font = workbook.CreateFont() as HSSFFont;
                        font.FontHeightInPoints = 10;
                        font.Boldweight = 700;
                        headStyle.SetFont(font);

                        foreach (DataColumn column in dtSource.Columns)
                        {
                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
                            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

                            //设置列宽
                            sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);

                        }
                        //headerRow.Dispose();
                    }

                    #endregion

                    rowIndex = 2;
                }

                #endregion

                #region 填充内容

                HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
                foreach (DataColumn column in dtSource.Columns)
                {
                    HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;

                    string drValue = row[column].ToString();

                    switch (column.DataType.ToString())
                    {
                        case "System.String": //字符串类型
                            double result;
                            if (IsNumeric(drValue, out result))
                            {

                                double.TryParse(drValue, out result);
                                newCell.SetCellValue(result);
                                break;
                            }
                            else
                            {
                                newCell.SetCellValue(drValue);
                                break;
                            }

                        case "System.DateTime": //日期类型
                            DateTime dateV;
                            DateTime.TryParse(drValue, out dateV);
                            newCell.SetCellValue(dateV);

                            newCell.CellStyle = dateStyle; //格式化显示
                            break;
                        case "System.Boolean": //布尔型
                            bool boolV = false;
                            bool.TryParse(drValue, out boolV);
                            newCell.SetCellValue(boolV);
                            break;
                        case "System.Int16": //整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(drValue, out intV);
                            newCell.SetCellValue(intV);
                            break;
                        case "System.Decimal": //浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(drValue, out doubV);
                            newCell.SetCellValue(doubV);
                            break;
                        case "System.DBNull": //空值处理
                            newCell.SetCellValue("");
                            break;
                        default:
                            newCell.SetCellValue("");
                            break;
                    }

                }

                #endregion

                rowIndex++;
            }
            using (MemoryStream ms = new MemoryStream())
            {
                workbook.Write(ms);
                ms.Flush();
                ms.Position = 0;

                //sheet;
                //workbook.Dispose();

                return ms;
            }
        }

        /// <summary>
        /// DataTable导出到Excel文件
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        /// <param name="strFileName">保存位置</param>
        public static void ExportDTtoExcel(DataTable dtSource, string strHeaderText, string strFileName)
        {
            using (MemoryStream ms = ExportDt(dtSource, strHeaderText))
            {
                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
            }
        }
        #endregion

        #region 从excel2003/2007中将数据导出到datatable(默认第一行为标头,实际数据从第二行读取)
        /// <summary>
        /// 自动辨别excel2003/2007
        /// </summary>
        /// <param name="strFileName">excel文档路径</param>
        /// <returns></returns>
        public static DataTable ImportExcelAllToDt(string strFileName)
        {
            DataTable dt = new DataTable();
            IWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = WorkbookFactory.Create(file);//使用接口，自动识别excel2003/2007格式
            }
            ISheet sheet = workbook.GetSheetAt(0);//得到里面第一个sheet
            //HSSFSheet sheet = hssfworkbook.GetSheetAt(0) as HSSFSheet;
            if (Path.GetExtension(strFileName).Equals(".xlsx"))
            {
                dt = ImportExcel2007InDt(sheet, 0, true);
                return dt;
            }
            else
            {
                dt = ImportExcel2003InDt(sheet, 0, true);
                return dt;
            }

        }

        /// <summary>读取excel
        /// 默认第一行为标头,实际数据从第二行读取
        /// </summary>
        /// <param name="strFileName">excel文档路径</param>
        /// <returns></returns>
        public static DataTable ImportExcel2003ToDt(string strFileName)
        {
            DataTable dt = new DataTable();
            IWorkbook hssfworkbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                hssfworkbook = new HSSFWorkbook(file);
            }
            HSSFSheet sheet = hssfworkbook.GetSheetAt(0) as HSSFSheet;
            dt = ImportExcel2003InDt(sheet, 0, true);
            return dt;
        }

        /// <summary>读取excel
        /// 默认第一行为标头,实际数据从第二行读取
        /// </summary>
        /// <param name="strFileName">excel文档路径</param>
        /// <returns></returns>
        public static DataTable ImportExcel2007ToDt(string strFileName)
        {
            DataTable dt = new DataTable();
            IWorkbook hssfworkbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                hssfworkbook = new XSSFWorkbook(file);
            }
            ISheet sheet = hssfworkbook.GetSheetAt(0);
            dt = ImportExcel2007InDt(sheet, 0, true);
            return dt;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheetName">需要导出的sheet</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExcel2003ToDt(string strFileName, string sheetName, int headerRowIndex)
        {
            IWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = new HSSFWorkbook(file);
            }
            HSSFSheet sheet = workbook.GetSheet(sheetName) as HSSFSheet;
            DataTable table = new DataTable();
            table = ImportExcel2003InDt(sheet, headerRowIndex, true);
            //ExcelFileStream.Close();
            workbook = null;
            sheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheetName">需要导出的sheet</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExcel2007ToDt(string strFileName, string sheetName, int headerRowIndex)
        {
            IWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = new XSSFWorkbook(file);
            }
            HSSFSheet sheet = workbook.GetSheet(sheetName) as HSSFSheet;
            DataTable table = new DataTable();
            table = ImportExcel2007InDt(sheet, headerRowIndex, true);
            //ExcelFileStream.Close();
            workbook = null;
            sheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheetIndex">需要导出的sheet序号</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExcel2003ToDt(string strFileName, int sheetIndex, int headerRowIndex)
        {
            HSSFWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = new HSSFWorkbook(file);
            }
            HSSFSheet sheet = workbook.GetSheetAt(sheetIndex) as HSSFSheet;
            DataTable table = new DataTable();
            table = ImportExcel2003InDt(sheet, headerRowIndex, true);
            //ExcelFileStream.Close();
            workbook = null;
            sheet = null;
            return table;
        }
        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheetIndex">需要导出的sheet序号</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExcel2007ToDt(string strFileName, int sheetIndex, int headerRowIndex)
        {
            IWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = new XSSFWorkbook(file);
            }
            HSSFSheet sheet = workbook.GetSheetAt(sheetIndex) as HSSFSheet;
            DataTable table = new DataTable();
            table = ImportExcel2007InDt(sheet, headerRowIndex, true);
            //ExcelFileStream.Close();
            workbook = null;
            sheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheetName">需要导出的sheet</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <param name="needHeader">是否需要头</param>
        /// <returns></returns>
        public static DataTable ImportExcel2003ToDt(string strFileName, string sheetName, int headerRowIndex, bool needHeader)
        {
            IWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = new HSSFWorkbook(file);
            }
            HSSFSheet sheet = workbook.GetSheet(sheetName) as HSSFSheet;
            DataTable table = new DataTable();
            table = ImportExcel2003InDt(sheet, headerRowIndex, needHeader);
            //ExcelFileStream.Close();
            workbook = null;
            sheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheetIndex">需要导出的sheet序号</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <param name="needHeader">是否需要头</param>
        /// <returns></returns>
        public static DataTable ImportExcel2003ToDt(string strFileName, int sheetIndex, int headerRowIndex, bool needHeader)
        {
            HSSFWorkbook workbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                workbook = new HSSFWorkbook(file);
            }
            HSSFSheet sheet = workbook.GetSheetAt(sheetIndex) as HSSFSheet;
            DataTable table = new DataTable();
            table = ImportExcel2003InDt(sheet, headerRowIndex, needHeader);
            //ExcelFileStream.Close();
            workbook = null;
            sheet = null;
            return table;
        }

        static DataTable ImportExcel2003InDt(ISheet sheet, int headerRowIndex, bool needHeader)
        {
            DataTable table = new DataTable();
            HSSFRow headerRow;
            int cellCount;
            try
            {
                if (headerRowIndex < 0 || !needHeader)
                {
                    headerRow = sheet.GetRow(0) as HSSFRow;
                    cellCount = headerRow.LastCellNum;

                    for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                    {
                        DataColumn column = new DataColumn(Convert.ToString(i));
                        table.Columns.Add(column);
                    }
                }
                else
                {
                    headerRow = sheet.GetRow(headerRowIndex) as HSSFRow;
                    cellCount = headerRow.LastCellNum;

                    for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                    {
                        if (headerRow.GetCell(i) == null)
                        {
                            if (table.Columns.IndexOf(Convert.ToString(i)) > 0)
                            {
                                DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
                                table.Columns.Add(column);
                            }
                            else
                            {
                                DataColumn column = new DataColumn(Convert.ToString(i));
                                table.Columns.Add(column);
                            }

                        }
                        else if (table.Columns.IndexOf(headerRow.GetCell(i).ToString()) > 0)
                        {
                            DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
                            table.Columns.Add(column);
                        }
                        else
                        {
                            DataColumn column = new DataColumn(headerRow.GetCell(i).ToString());
                            table.Columns.Add(column);
                        }
                    }
                }
                int rowCount = sheet.LastRowNum;
                for (int i = (headerRowIndex + 1); i <= sheet.LastRowNum; i++)
                {
                    try
                    {
                        HSSFRow row;
                        if (sheet.GetRow(i) == null)
                        {
                            row = sheet.CreateRow(i) as HSSFRow;
                        }
                        else
                        {
                            row = sheet.GetRow(i) as HSSFRow;
                        }

                        DataRow dataRow = table.NewRow();

                        for (int j = row.FirstCellNum; j <= cellCount; j++)
                        {
                            try
                            {
                                if (row.GetCell(j) != null)
                                {
                                    switch (row.GetCell(j).CellType)
                                    {
                                        case CellType.String:
                                            string str = row.GetCell(j).StringCellValue;
                                            if (str != null && str.Length > 0)
                                            {
                                                dataRow[j] = str.ToString();
                                            }
                                            else
                                            {
                                                dataRow[j] = null;
                                            }
                                            break;
                                        case CellType.Numeric:
                                            if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
                                            {
                                                dataRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
                                            }
                                            else
                                            {
                                                dataRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
                                            }
                                            break;
                                        case CellType.Boolean:
                                            dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                            break;
                                        case CellType.Error:
                                            dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                            break;
                                        case CellType.Formula:
                                            switch (row.GetCell(j).CachedFormulaResultType)
                                            {
                                                case CellType.String:
                                                    string strFORMULA = row.GetCell(j).StringCellValue;
                                                    if (strFORMULA != null && strFORMULA.Length > 0)
                                                    {
                                                        dataRow[j] = strFORMULA.ToString();
                                                    }
                                                    else
                                                    {
                                                        dataRow[j] = null;
                                                    }
                                                    break;
                                                case CellType.Numeric:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
                                                    break;
                                                case CellType.Boolean:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                                    break;
                                                case CellType.Error:
                                                    dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                                    break;
                                                default:
                                                    dataRow[j] = "";
                                                    break;
                                            }
                                            break;
                                        default:
                                            dataRow[j] = "";
                                            break;
                                    }
                                }
                            }
                            catch (Exception exception)
                            {
                                //wl.WriteLogs(exception.ToString());
                            }
                        }
                        table.Rows.Add(dataRow);
                    }
                    catch (Exception exception)
                    {
                        //wl.WriteLogs(exception.ToString());
                    }
                }
            }
            catch (Exception exception)
            {
                //wl.WriteLogs(exception.ToString());
            }
            return table;
        }

        /// <summary>
        /// 将制定sheet中的数据导出到datatable中
        /// </summary>
        /// <param name="sheet">需要导出的sheet</param>
        /// <param name="headerRowIndex">列头所在行号，-1表示没有列头</param>
        /// <param name="needHeader">是否需要列头</param>
        /// <returns></returns>
        static DataTable ImportExcel2007InDt(ISheet sheet, int headerRowIndex, bool needHeader)
        {
            DataTable table = new DataTable();
            NPOI.XSSF.UserModel.XSSFRow headerRow;
            int cellCount;
            try
            {
                if (headerRowIndex < 0 || !needHeader)
                {
                    headerRow = sheet.GetRow(0) as NPOI.XSSF.UserModel.XSSFRow;
                    cellCount = headerRow.LastCellNum;

                    for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                    {
                        DataColumn column = new DataColumn(Convert.ToString(i));
                        table.Columns.Add(column);
                    }
                }
                else
                {
                    headerRow = sheet.GetRow(headerRowIndex) as NPOI.XSSF.UserModel.XSSFRow;
                    cellCount = headerRow.LastCellNum;

                    for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                    {
                        if (headerRow.GetCell(i) == null)
                        {
                            if (table.Columns.IndexOf(Convert.ToString(i)) > 0)
                            {
                                DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
                                table.Columns.Add(column);
                            }
                            else
                            {
                                DataColumn column = new DataColumn(Convert.ToString(i));
                                table.Columns.Add(column);
                            }

                        }
                        else if (table.Columns.IndexOf(headerRow.GetCell(i).ToString()) > 0)
                        {
                            DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
                            table.Columns.Add(column);
                        }
                        else
                        {
                            DataColumn column = new DataColumn(headerRow.GetCell(i).ToString());
                            table.Columns.Add(column);
                        }
                    }
                }
                int rowCount = sheet.LastRowNum;
                for (int i = (headerRowIndex + 1); i <= sheet.LastRowNum; i++)
                {
                    try
                    {
                        NPOI.XSSF.UserModel.XSSFRow row;
                        if (sheet.GetRow(i) == null)
                        {
                            row = sheet.CreateRow(i) as NPOI.XSSF.UserModel.XSSFRow;
                        }
                        else
                        {
                            row = sheet.GetRow(i) as NPOI.XSSF.UserModel.XSSFRow;
                        }

                        DataRow dataRow = table.NewRow();

                        for (int j = row.FirstCellNum; j <= cellCount; j++)
                        {
                            try
                            {
                                if (row.GetCell(j) != null)
                                {
                                    switch (row.GetCell(j).CellType)
                                    {
                                        case CellType.String:
                                            string str = row.GetCell(j).StringCellValue;
                                            if (str != null && str.Length > 0)
                                            {
                                                dataRow[j] = str.ToString();
                                            }
                                            else
                                            {
                                                dataRow[j] = null;
                                            }
                                            break;
                                        case CellType.Numeric:
                                            if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
                                            {
                                                dataRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
                                            }
                                            else
                                            {
                                                dataRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
                                            }
                                            break;
                                        case CellType.Boolean:
                                            dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                            break;
                                        case CellType.Error:
                                            dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                            break;
                                        case CellType.Formula:
                                            switch (row.GetCell(j).CachedFormulaResultType)
                                            {
                                                case CellType.String:
                                                    string strFormula = row.GetCell(j).StringCellValue;
                                                    if (!string.IsNullOrEmpty(strFormula))
                                                    {
                                                        dataRow[j] = strFormula;
                                                    }
                                                    else
                                                    {
                                                        dataRow[j] = null;
                                                    }
                                                    break;
                                                case CellType.Numeric:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
                                                    break;
                                                case CellType.Boolean:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                                    break;
                                                case CellType.Error:
                                                    dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                                    break;
                                                default:
                                                    dataRow[j] = "";
                                                    break;
                                            }
                                            break;
                                        default:
                                            dataRow[j] = "";
                                            break;
                                    }
                                }
                            }
                            catch (Exception exception)
                            {
                                //wl.WriteLogs(exception.ToString());
                            }
                        }
                        table.Rows.Add(dataRow);
                    }
                    catch (Exception exception)
                    {
                        //wl.WriteLogs(exception.ToString());
                    }
                }
            }
            catch (Exception exception)
            {
                //wl.WriteLogs(exception.ToString());
            }
            return table;
        }
        #endregion

        #region 更新excel中的数据
        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluid">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, string[] updateData, int coluid, int rowid)
        {
            FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int i = 0; i < updateData.Length; i++)
            {
                try
                {
                    if (sheet1.GetRow(i + rowid) == null)
                    {
                        sheet1.CreateRow(i + rowid);
                    }
                    if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
                    {
                        sheet1.GetRow(i + rowid).CreateCell(coluid);
                    }

                    sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
                }
                catch (Exception ex)
                {
                    // wl.WriteLogs(ex.ToString());
                    throw;
                }
            }
            try
            {
                readfile.Close();
                FileStream writefile = new FileStream(outputFile, FileMode.Create, FileAccess.Write);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch (Exception ex)
            {
                // wl.WriteLogs(ex.ToString());
            }

        }

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluids">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, string[][] updateData, int[] coluids, int rowid)
        {
            FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
            readfile.Close();
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int j = 0; j < coluids.Length; j++)
            {
                for (int i = 0; i < updateData[j].Length; i++)
                {
                    try
                    {
                        if (sheet1.GetRow(i + rowid) == null)
                        {
                            sheet1.CreateRow(i + rowid);
                        }
                        if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
                        {
                            sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
                        }
                        sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
                    }
                    catch (Exception ex)
                    {
                        // wl.WriteLogs(ex.ToString());
                    }
                }
            }
            try
            {
                FileStream writefile = new FileStream(outputFile, FileMode.Create);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch (Exception ex)
            {
                //wl.WriteLogs(ex.ToString());
            }
        }

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluid">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, double[] updateData, int coluid, int rowid)
        {
            FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int i = 0; i < updateData.Length; i++)
            {
                try
                {
                    if (sheet1.GetRow(i + rowid) == null)
                    {
                        sheet1.CreateRow(i + rowid);
                    }
                    if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
                    {
                        sheet1.GetRow(i + rowid).CreateCell(coluid);
                    }

                    sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
                }
                catch (Exception ex)
                {
                    //wl.WriteLogs(ex.ToString());
                    throw;
                }
            }
            try
            {
                readfile.Close();
                FileStream writefile = new FileStream(outputFile, FileMode.Create, FileAccess.Write);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch (Exception ex)
            {
                //wl.WriteLogs(ex.ToString());
            }

        }

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluids">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, double[][] updateData, int[] coluids, int rowid)
        {
            FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
            readfile.Close();
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int j = 0; j < coluids.Length; j++)
            {
                for (int i = 0; i < updateData[j].Length; i++)
                {
                    try
                    {
                        if (sheet1.GetRow(i + rowid) == null)
                        {
                            sheet1.CreateRow(i + rowid);
                        }
                        if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
                        {
                            sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
                        }
                        sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
                    }
                    catch (Exception ex)
                    {
                        //wl.WriteLogs(ex.ToString());
                    }
                }
            }
            try
            {
                FileStream writefile = new FileStream(outputFile, FileMode.Create);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch (Exception ex)
            {
                //wl.WriteLogs(ex.ToString());
            }
        }

        #endregion

        #region 读取Excel文件,获取有多少个Sheet数
        /// <summary>
        /// 读取Excel文件,获取有多少个Sheet数
        /// </summary>
        /// <param name="filePath">文件地址</param>
        /// <returns></returns>
        public static int GetSheetNumber(string filePath)
        {
            int number = 0;
            try
            {
                FileStream readfile = new FileStream(filePath, FileMode.Open, FileAccess.Read);

                HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
                number = hssfworkbook.NumberOfSheets;

            }
            catch (Exception exception)
            {
                //wl.WriteLogs(exception.ToString());
            }
            return number;
        }

        #endregion

        #region 获取Excel文件中,Sheet表单的名字列表
        /// <summary>
        /// 获取Excel文件中,Sheet表单的名字列表
        /// </summary>
        /// <param name="filePath">文件地址</param>
        /// <returns></returns>
        public static ArrayList GetSheetName(string filePath)
        {
            ArrayList arrayList = new ArrayList();
            try
            {
                FileStream readfile = new FileStream(filePath, FileMode.Open, FileAccess.Read);

                HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
                for (int i = 0; i < hssfworkbook.NumberOfSheets; i++)
                {
                    arrayList.Add(hssfworkbook.GetSheetName(i));
                }
            }
            catch (Exception exception)
            {
                //wl.WriteLogs(exception.ToString());
            }
            return arrayList;
        }

        #endregion

        #region 是否是数字
        /// <summary>
        /// 是否是数字
        /// </summary>
        /// <param name="message"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        public static bool IsNumeric(String message, out double result)
        {
            Regex rex = new Regex(@"^[-]?\d+[.]?\d*$");
            result = -1;
            if (rex.IsMatch(message))
            {
                result = double.Parse(message);
                return true;
            }
            else
                return false;

        }

        #endregion

        #region Excel2007 的导入 导出
        /// <summary>
        /// 将Excel文件中的数据读出到DataTable中(xlsx)
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns>
        public static DataTable ExcelToTableForXLSX(string file)
        {
            DataTable dt = new DataTable();
            using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
            {
                XSSFWorkbook xssfworkbook = new XSSFWorkbook(fs);
                ISheet sheet = xssfworkbook.GetSheetAt(0);

                //表头
                IRow header = sheet.GetRow(sheet.FirstRowNum);
                List<int> columns = new List<int>();
                for (int i = 0; i < header.LastCellNum; i++)
                {
                    object obj = GetValueTypeForXLSX(header.GetCell(i) as XSSFCell);
                    if (obj == null || obj.ToString() == string.Empty)
                    {
                        dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
                        //continue;
                    }
                    else
                        dt.Columns.Add(new DataColumn(obj.ToString()));
                    columns.Add(i);
                }
                //数据
                for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
                {
                    DataRow dr = dt.NewRow();
                    bool hasValue = false;
                    foreach (int j in columns)
                    {
                        dr[j] = GetValueTypeForXLSX(sheet.GetRow(i).GetCell(j) as XSSFCell);
                        if (dr[j] != null && dr[j].ToString() != string.Empty)
                        {
                            hasValue = true;
                        }
                    }
                    if (hasValue)
                    {
                        dt.Rows.Add(dr);
                    }
                }
            }
            return dt;
        }

        /// <summary>
        /// 将DataTable数据导出到Excel文件中(xlsx)
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="file"></param>
        public static void TableToExcelForXLSX(DataTable dt, string file)
        {
            XSSFWorkbook xssfworkbook = new XSSFWorkbook();
            ISheet sheet = xssfworkbook.CreateSheet("Test");

            //表头
            IRow row = sheet.CreateRow(0);
            for (int i = 0; i < dt.Columns.Count; i++)
            {
                ICell cell = row.CreateCell(i);
                cell.SetCellValue(dt.Columns[i].ColumnName);
            }

            //数据
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                IRow row1 = sheet.CreateRow(i + 1);
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    ICell cell = row1.CreateCell(j);
                    cell.SetCellValue(dt.Rows[i][j].ToString());
                }
            }

            //转为字节数组
            MemoryStream stream = new MemoryStream();
            xssfworkbook.Write(stream);
            var buf = stream.ToArray();

            //保存为Excel文件
            using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write))
            {
                fs.Write(buf, 0, buf.Length);
                fs.Flush();
            }
        }

        /// <summary>
        /// 获取单元格类型(xlsx)
        /// </summary>
        /// <param name="cell"></param>
        /// <returns></returns>
        private static object GetValueTypeForXLSX(XSSFCell cell)
        {
            if (cell == null)
                return null;
            switch (cell.CellType)
            {
                case CellType.Blank: //BLANK:
                    return null;
                case CellType.Boolean: //BOOLEAN:
                    return cell.BooleanCellValue;
                case CellType.Numeric: //NUMERIC:
                    return cell.NumericCellValue;
                case CellType.String: //STRING:
                    return cell.StringCellValue;
                case CellType.Error: //ERROR:
                    return cell.ErrorCellValue;
                case CellType.Formula: //FORMULA:
                default:
                    return "=" + cell.CellFormula;
            }
        }

        #endregion

    }
}

ExcelNpoiHelper

时间： 2024-10-09 10:41:27

使用NPOI 2.1.1读取EXCEL2003/2007返回DataTable的相关文章

C#读取txt文件返回DATATABLE

//1.打开资源管理器 OpenFileDialog open = new OpenFileDialog(); if (open.ShowDialog() == DialogResult.OK) { textBox1.Text =open.FileName; } //传入txt文件路径参数 读取txt文件所有内容 返回DATATABLE public DataTable GetTxt(string pths)        {            StreamReader sr = new S

PHPExcel 读取excel2003，2007各个版本整理

PHPExcel 读取excel2003,2007各个版本整理 最近在做一个php读取excel存入数据库的功能,于是用到了phpexcel,下载安装以后只能读取excel2003,2007以后的读取不了,搜了很多很多方法,也用了不少时间,最后总结一下吧,希望帮助以后像我这样的新手 首先读取2007的时候 一直没法load文件,最后发现好像是,没有读取权限吧? 说说解决方法吧 1. 设置php.ini里面的open_basedir,把前面的:去掉,也就是取消注释 这时又报错了:PHPExcel

java使用poi.3.10读取excel 2007以上版本（xlsx格式）

1.在使用过程中,一直报错 throw new ClassNotFoundException(name);原因:没有导入xmlbeans-2.6.0.jar包,建议在使用poi时,将所有包都导入进工程. 2.案例源码 import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.Iterator; import org.apache.poi.hssf

NPOI 导入Excel和读取Excel

1.整个Excel表格叫做工作表:WorkBook(工作薄),包含的叫页(工作表):Sheet:行:Row:单元格Cell. 2.NPOI是POI的C#版本,NPOI的行和列的index都是从0开始 3.POI读取Excel有两种格式一个是HSSF,另一个是XSSF. HSSF和XSSF的区别如下: HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) file format. XSSF is the

echarts通过ajax向服务器发送post请求,servlet从数据库读取数据并返回前端

1.echarts的官网上的demo,都是直接写死的随机数据,没有和数据库的交互,所以就自己写了一下,ok,我们开始一步一步走一遍整个流程吧. 就以官网最简单的那个小demo来做修改吧.官网上的小demo的效果图如下:(很熟悉,有没有) 2.按照echarts的使用方法新建一个echarts.html文件.为ECharts准备一个具备大小(宽高)的Dom(讲的有点细,熟悉的朋友直接跳过) <!DOCTYPE html> <head> <meta charset="u

服务器不装Excel读取Excel并转换DataTable

原来是用OleDb.4.0组件读取Excel,但是放到服务器后 傻了,服务器没装Excel ,而且领导说不可以装 没办法,只好自己重新找下代码 在CodeProject找到一个开源的dll,一阵欢喜啊,虽然是winform项目,但是主要是用他的类库所以提取一下后 自己研究后重新封装了一个类,运行 耶! 完美支持 需要Dome的同学下载后去研究下吧 地址:http://download.csdn.net/detail/jine515073/7266371 本人用 Excel 97-2003 工作表

【c#操作office】--OleDbDataAdapter 与OleDbDataReader方式读取excel,并转换为datatable

OleDbDataAdapter方式: /// <summary> /// 读取excel的表格放到DataTable中 ---OleDbDataAdapter /// </summary> /// <param name="strSql"></param>        /// <param name="excelpath">excel路径</param> /// <returns>

java利用poi来读取execl表格返回对象

利用poi来读取execl表格,返回一个对象(可能有点不完善,但是应该能满足平常的所用),用到了反射等等; 使用的jar包有: commons-collections4-4.1.jar poi-3.17.jar poi-ooxml.3.17.jar poi-ooxml-schemas.3.17.jar xmllbeans-2.6.0.jar /** * 静态属性包 * @author Administrator * */public class Common { public static fi

JAVA读取Excel2003、2007、2010教程

import java.io.File;import java.io.FileInputStream;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Sheet;import org.apache.poi.ss.usermodel.Workbook;import org.apache.poi.ss.usermodel.WorkbookFactory; public class TestExcel