NPOI读写Excel (使用NPOI2.0 包含03和07版本)
NPOI 2.0将OOXML的代码放在了单独的DLL中,使用前请确保引用了以下DLL NPOI.dll NPOI.OOXML.dll NPOI.OpenXml4Net.dll NPOI.OpenXmlFormats.dll --------------------------------------------------------------------------------------------------------
NPOI 2.0将OOXML的代码放在了单独的DLL中,使用前请确保引用了以下DLL
NPOI.dll
NPOI.OOXML.dll
NPOI.OpenXml4Net.dll
NPOI.OpenXmlFormats.dll
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http://www.cnblogs.com/luxiaoxun/p/3374992.html
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 POI Project's pure Java implementation of the Excel 2007 OOXML (.xlsx) file format.
即:HSSF适用2007以前的版本,XSSF适用2007版本及其以上的。
下面是用NPOI读写Excel的例子:ExcelHelper封装的功能主要是把DataTable中数据写入到Excel中,或者是从Excel读取数据到一个DataTable中。
ExcelHelper类:
using System; using System.Collections.Generic; using System.Linq; using System.Text; using NPOI.SS.UserModel; using NPOI.XSSF.UserModel; using NPOI.HSSF.UserModel; using System.IO; using System.Data; namespace GMapDemo { class ExcelHelper : IDisposable { private string fileName = null; //文件名 private IWorkbook workbook = null; private FileStream fs = null; private bool disposed; public ExcelHelper(string fileName) { this.fileName = fileName; disposed = false; } ////// 将DataTable数据导入到excel中 /// /// 要导入的数据 /// DataTable的列名是否要导入 /// 要导入的excel的sheet的名称 ///导入数据行数(包含列名那一行) public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten) { int i = 0; int j = 0; int count = 0; ISheet sheet = null; fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(); try { if (workbook != null) { sheet = workbook.CreateSheet(sheetName); } else { return -1; } if (isColumnWritten == true) //写入DataTable的列名 { IRow row = sheet.CreateRow(0); for (j = 0; j /// 将excel中的数据导入到DataTable中 /// /// excel工作薄sheet的名称 /// 第一行是否是DataTable的列名 ///返回的DataTable public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; try { fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(fs); if (sheetName != null) { sheet = workbook.GetSheet(sheetName); } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { IRow firstRow = sheet.GetRow(0); int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数 if (isFirstRowColumn) { for (int i = firstRow.FirstCellNum; i
1.NPOI下载地址:http://npoi.codeplex.com/releases/view/38113
2.NPOI学习系列教程推荐:http://www.cnblogs.com/tonyqus/archive/2009/04/12/1434209.html
参考:
http://www.cnblogs.com/Erik_Xu/archive/2012/06/08/2541957.html
http://www.cnblogs.com/linzheng/archive/2010/12/20/1912137.html
http://www.cnblogs.com/knowledgesea/archive/2012/11/16/2772547.html