This document introduces the EPPlus library for working with Excel files in .NET. It provides a simple and convenient API for reading and writing Excel 2007/2010 files using the Open XML format. The document outlines EPPlus and compares it to other Excel libraries, discusses licensing and limitations, and provides an example code snippet for creating an Excel file and adding content programmatically. It recommends EPPlus as a preferable alternative to NPOI for Excel file operations in .NET applications.

1. 1
Excel 元件 -EPPlus!
Presented by
Joncash
6/1/2012

2. 2
Outline
• Introduction EPPlus
• Other Library
• Limit & License
• How to use
• Snippet Code
• References

3. 3
Introduction EPPLus
• EPPlus is a .net library that reads and writes
Excel 2007/2010 files using the Open Office Xml
format (xlsx).
• EPPlus 提供簡單、便捷的 API 介面
▫ 用 .Cells[rowIndex, colIndex] 就能直接存取欄位
▫ 用 .Cells[r1:c1] 就能取得一段選取範圍
▫ 用 Cells[…].Style.Font.Color.SetColor(Color.Red)
改變字型
▫ Many more

4. 4
Other Library
• NPOI Library
▫ 源自於 Apache POI 專案
• Open XML SDK
▫ 微軟提供的函式庫
• OpenOffice.org SDK
▫ OpenOffice
• LinqToExcel
▫ 只限於讀取

5. 5
Limit & License
• Only Support Excel 2007/2010
• LGPL （ GNU Lesser General Public
License ）
▫ 純引用 Library 不用 open source.
▫ 有修改 Library, 修改的部份要及產品中使用到的
Source Code 要 Open Source

6. 6
How to use
• Download
▫ http://epplus.codeplex.com/
▫ NuGet
• Reference EPPlus.dll in your project

7. 7
Snippet Code
//Create Excel
FileInfo newFile = new FileInfo(outputDir.FullName +
@"sample6.xlsx");
ExcelPackage pck = new ExcelPackage(newFile);
//Add the Content sheet
var ws = pck.Workbook.Worksheets.Add("Content");
//set style
ws.Cells["B1:E1"].Style.Font.Bold = true;
//set value
ws.Cells["B1"].Value = "Name";

8. 8
EPPlus and Linq
var sheet1 = pck.Workbook.Worksheets["Sheet1"];
var query = (from cell in sheet1.Cells["a:a"]
where cell.Value != ""
select cell);
query3.SingleOrDefault().Value.Dump();
Version 2.8 has added support for
enumeration of cells....

9. 9
NPOI V.S EPPlus
NPOI EPPLUs
// 建立 worksheet var pck = new ExcelPackage(new
var workBook = new HSSFWorkbook(); FileInfo(@"D:EPPLus.xlsx"));
// 建立 sheet // 建立 sheet
var sheet1 = var sheet1 =
workBook.CreateSheet("Sheet1");
pck.Workbook.Worksheets.Add("Sheet1")
;
// 設值
sheet1.CreateRow(1).CreateCell(1).SetCell
Value("XXX"); // 設值
sheet1.Cells[1, 1].Value = "XXX";
// 存檔
FileStream file = new // 存檔
FileStream(@"C:NPOI.xls", pck.Save();
FileMode.Create);
hssfworkbook.Write(file);
file.Close();

10. 10
References
• 比NPOI更討喜的Excel元件-EPPlus!
• EPPlus-Create advanced Excel 2007 spreadsheets on
• [C#] NPOI、OpenXML SDK、
OpenOffice.org SDK 寫入資料到 EXCEL 檔案
• 在 Server 端存取 Excel 檔案的利器：
NPOI Library
• Creating Reports in Excel 2007 using EPPlus (