C#利用NPOI处理excel的类NPOIHelper.cs

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› C++›C++教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

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

    public class NPOIHelper
    {
        private static WriteLog wl = new WriteLog();


        #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 = "http://www.yongfa365.com/";
            //    workbook.DocumentSummaryInformation = dsi;

            //    SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
            //    si.Author = "柳永法"; //填加xls文件作者信息
            //    si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息
            //    si.LastAuthor = "柳永法2"; //填加xls文件最后保存者信息
            //    si.Comments = "说明信息"; //填加xls文件作者信息
            //    si.Title = "NPOI测试"; //填加xls文件标题信息
            //    si.Subject = "NPOI测试Demo"; //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.Dispose();
                //workbook.Dispose();

                return ms;
            }
        }

        /// <summary>
        /// DataTable导出到Excel的MemoryStream
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        static void ExportDTI(DataTable dtSource, string strHeaderText, FileStream fs)
        {
            XSSFWorkbook workbook = new XSSFWorkbook();
            XSSFSheet sheet = workbook.CreateSheet() as XSSFSheet;

            #region 右击文件 属性信息

            //{
            //    DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
            //    dsi.Company = "http://www.yongfa365.com/";
            //    workbook.DocumentSummaryInformation = dsi;

            //    SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
            //    si.Author = "柳永法"; //填加xls文件作者信息
            //    si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息
            //    si.LastAuthor = "柳永法2"; //填加xls文件最后保存者信息
            //    si.Comments = "说明信息"; //填加xls文件作者信息
            //    si.Title = "NPOI测试"; //填加xls文件标题信息
            //    si.Subject = "NPOI测试Demo"; //填加文件主题信息
            //    si.CreateDateTime = DateTime.Now;
            //    workbook.SummaryInformation = si;
            //}

            #endregion

            XSSFCellStyle dateStyle = workbook.CreateCellStyle() as XSSFCellStyle;
            XSSFDataFormat format = workbook.CreateDataFormat() as XSSFDataFormat;
            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 == 0)
                {
                    #region 表头及样式
                    //{
                    //    XSSFRow headerRow = sheet.CreateRow(0) as XSSFRow;
                    //    headerRow.HeightInPoints = 25;
                    //    headerRow.CreateCell(0).SetCellValue(strHeaderText);

                    //    XSSFCellStyle headStyle = workbook.CreateCellStyle() as XSSFCellStyle;
                    //    headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;
                    //    XSSFFont font = workbook.CreateFont() as XSSFFont;
                    //    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

                    {
                        XSSFRow headerRow = sheet.CreateRow(0) as XSSFRow;


                        XSSFCellStyle headStyle = workbook.CreateCellStyle() as XSSFCellStyle;
                        headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;
                        XSSFFont font = workbook.CreateFont() as XSSFFont;
                        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 = 1;
                }

                #endregion

                #region 填充内容

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

                    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++;
            }
            workbook.Write(fs);
            fs.Close();
        }

        /// <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)
        {
            string[] temp = strFileName.Split('.');

            if (temp[temp.Length - 1] == "xls" && dtSource.Columns.Count < 256 && dtSource.Rows.Count < 65536)
            {
                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();
                    }
                }
            }
            else
            {
                if (temp[temp.Length - 1] == "xls")
                    strFileName = strFileName + "x";

                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                {
                    ExportDTI(dtSource, strHeaderText, fs);
                }
            }
        }
        #endregion

        #region 从excel中将数据导出到datatable
        /// <summary>
        /// 读取excel 默认第一行为标头
        /// </summary>
        /// <param name="strFileName">excel文档路径</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName)
        {
            DataTable dt = new DataTable();
            IWorkbook wb;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = WorkbookFactory.Create(file);
            }
            ISheet sheet = wb.GetSheetAt(0);
            dt = ImportDt(sheet, 0, true);
            return dt;
        }

        /// <summary>
        /// 读取Excel流到DataTable
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <returns>第一个sheet中的数据</returns>
        public static DataTable ImportExceltoDt(Stream stream)
        {
            try
            {
                DataTable dt = new DataTable();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                ISheet sheet = wb.GetSheetAt(0);
                dt = ImportDt(sheet, 0, true);
                return dt;
            }
            catch (Exception)
            {

                throw;
            }
        }

        /// <summary>
        /// 读取Excel流到DataTable
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <param name="sheetName">表单名</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns>指定sheet中的数据</returns>
        public static DataTable ImportExceltoDt(Stream stream, string sheetName, int HeaderRowIndex)
        {
            try
            {
                DataTable dt = new DataTable();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                ISheet sheet = wb.GetSheet(sheetName);
                dt = ImportDt(sheet, HeaderRowIndex, true);
                return dt;
            }
            catch (Exception)
            {

                throw;
            }
        }

        /// <summary>
        /// 读取Excel流到DataSet
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <returns>Excel中的数据</returns>
        public static DataSet ImportExceltoDs(Stream stream)
        {
            try
            {
                DataSet ds = new DataSet();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                for (int i = 0; i < wb.NumberOfSheets; i++)
                {
                    DataTable dt = new DataTable();
                    ISheet sheet = wb.GetSheetAt(i);
                    dt = ImportDt(sheet, 0, true);
                    ds.Tables.Add(dt);
                }
                return ds;
            }
            catch (Exception)
            {

                throw;
            }
        }

        /// <summary>
        /// 读取Excel流到DataSet
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <param name="dict">字典参数，key：sheet名，value：列头所在行号，-1表示没有列头</param>
        /// <returns>Excel中的数据</returns>
        public static DataSet ImportExceltoDs(Stream stream,Dictionary<string,int> dict)
        {
            try
            {
                DataSet ds = new DataSet();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                foreach (string key in dict.Keys)
                {
                    DataTable dt = new DataTable();
                    ISheet sheet = wb.GetSheet(key);
                    dt = ImportDt(sheet, dict[key], true);
                    ds.Tables.Add(dt);
                }
                return ds;
            }
            catch 
                       
                    
                     
                      



鲜花




握手




雷人




路过




鸡蛋

该文章已有0人参与评论

请发表评论

全部评论

专题导读

More+

10-27 六六分期app的软件客服如何联系？(六六分期

11-06 可心卡盟:win10系统火狐flash插件崩溃怎么

11-06 亲亲特价:怎么删除回收站图标

11-06 济南大学虚拟社区:鲁大师节能降温的具体办

11-06 xlueops.exe:无线网络安装向导

11-06 女斗合众国:win7系统cf与主机连接不稳定怎

11-06 0xc000022-[cf烟雾头]cf怎么调烟雾头

11-06 qizideyouhuo:应用程序无法正常启动0xc0000

11-06 ipz-185:win7系统vcf文件怎么打开

11-06 傻哥蹦迪:win10系统s4怎么打开usb调试

11-06 八神浩树gtaste:回收站清空了怎么恢复

11-06 妖尾之黑色守护:win10系统电脑没有1440x900

11-06 校园至尊魔王小说:win7系统浏览网页时字体

11-06 女斗合众国:win10系统访问共享文件夹提示请

11-06 tokyo hot n0654:恢复win7系统默认字体一招

11-06 雨酷仙境:设置win7系统转移临时文件夹腾出

11-06 阿穆纳伊之杖:win7系统开始菜单在右边还原

11-06 tunespotting:win10系统火狐flash插件总是

11-06 甘尔葛分析师：计谋网站seo关键词暴涨有什

11-06 蔡贵霖: 计谋网站seo关键词暴涨有什么秘密

11-06 博益网首页:ao3网页版进入不了解决方法

11-06 漏斗子专栏: 网站数据分析小白易懂精华篇

11-06 见证双虹怎么做:win7系统开启telnet命令的

11-06 颾狐蝶蜋:系统资源不足无法完成请求的服务

11-06 国光中学校歌:提交网站到alexa查询详细步骤

11-06 西安有情天:静态网页和动态网页的区别

11-06 红木雅尚斋:外部链接构造对网站的好处

11-06 前官礼遇：防止域名劫持–增强域安全性的10

11-06 密传二转答案: 中文分词算法有哪些

11-06 金泉家园邮编:百度快照劫持的表现及应对方

深入理解Objective-C：优化你的代码发布时间：2022-07-13

C#保存Excel文件发布时间：2022-07-13

剪的笔顺,诠释剪的笔画,认识剪的部首

六六分期app的软件客服如何联系？(六六分期

2023-10-27

florent37/ViewAnimator: A fluent Android

2022-08-15

florent37/Shrine-MaterialDesign2: implem

2022-08-17

CVE-2020-36276

2022-09-23

SimpleSoftwareIO/simple-sms: Send and re

2022-08-13

阅读排行榜

1 六六分期app的软件客服如何联系？(六六分期

六六分期app的软件客服如何联系？不知道吗？加qq群【895510560】即可！标题：六六分期

阅读：19287|2023-10-27

2 可心卡盟:win10系统火狐flash插件崩溃怎么

今天小编告诉大家如何处理win10系统火狐flash插件总是崩溃的问题，可能很多用户都不知

阅读：10021|2022-11-06

3 亲亲特价:怎么删除回收站图标

今天小编告诉大家如何对win10系统删除桌面回收站图标进行设置，可能很多用户都不知道

阅读：8344|2022-11-06

4 济南大学虚拟社区:鲁大师节能降温的具体办

今天小编告诉大家如何对win10系统电脑设置节能降温的设置方法，想必大家都遇到过需要

阅读：8714|2022-11-06

5 xlueops.exe:无线网络安装向导

我们在使用xp系统的过程中,经常需要对xp系统无线网络安装向导设置进行设置，可能很多

阅读：8658|2022-11-06

6 女斗合众国:win7系统cf与主机连接不稳定怎

今天小编告诉大家如何处理win7系统玩cf老是与主机连接不稳定的问题，可能很多用户都不

阅读：9688|2022-11-06

7 0xc000022-[cf烟雾头]cf怎么调烟雾头

电脑对日常生活的重要性小编就不多说了，可是一旦碰到win7系统设置cf烟雾头的问题，很

阅读：8647|2022-11-06

8 qizideyouhuo:应用程序无法正常启动0xc0000

我们在日常使用电脑的时候，有的小伙伴们可能在打开应用的时候会遇见提示应用程序无法

阅读：8014|2022-11-06

9 ipz-185:win7系统vcf文件怎么打开

今天小编告诉大家如何对win7系统打开vcf文件进行设置，可能很多用户都不知道怎么对win

阅读：8683|2022-11-06

10 傻哥蹦迪:win10系统s4怎么打开usb调试

今天小编告诉大家如何对win10系统s4开启USB调试模式进行设置，可能很多用户都不知道怎

阅读：7550|2022-11-06

扫描微信二维码

查看手机版网站

随时了解更新最新资讯

139-2527-9053

在线客服（服务时间 9:00～18:00）

在线QQ客服

地址：深圳市南山区西丽大学城创智工业园

电邮：jeky_zhao#qq.com

移动电话：139-2527-9053

客服电话

电子邮件

C#利用NPOI处理excel的类NPOIHelper.cs

请发表评论

全部评论

上一篇：

下一篇：

CVE-2022-2115

dustinvtran/ml-videos: A collection of v

ravikumar001/maven

更的笔顺,体会更的笔画,理会更的部首

ceejbot/LOUDBOT: AUTOMATED SHOUTING FOR