###  NPOI

This project is migrated from Tony Qu's [NPOI](https://github.com/tonyqus/npoi) by DotNETCore team.

### NPOI of .net standard here, NPOI elsewhere

This NPOI use .net standard 2.0 version. NPOI is still under at [https://github.com/tonyqus/npoi](https://github.com/tonyqus/npoi)

### NuGet Package 

```powershell

Install-Package DotNetCore.NPOI

```
### What is NPOI ?

NPOI is the .NET version of POI Java project at http://poi.apache.org/. POI is an open source project which can help you read/write xls, doc, ppt files. It has a wide application.

For example, you can use it to
* generate a Excel report without Microsoft Office suite installed on your server and more efficient than call Microsoft Excel ActiveX at background;
* extract text from Office documents to help you implement full-text indexing feature (most of time this feature is used to create search engines). 
* extract images from Office documents
* generate Excel sheets that contains formulas

### How can it work on Linux?

On Linux, you need install `libgdiplus`.

- Ubuntu 16.04 and above:
	- apt-get install libgdiplus
	- cd /usr/lib
	- ln -s libgdiplus.so gdiplus.dll
- Fedora 23 and above:
	- dnf install libgdiplus
	- cd /usr/lib64/
	- ln -s libgdiplus.so.0 gdiplus.dll
- CentOS 7 and above:
	- yum install autoconf automake libtool
	- yum install freetype-devel fontconfig libXft-devel
	- yum install libjpeg-turbo-devel libpng-devel giflib-devel libtiff-devel libexif-devel
	- yum install glib2-devel cairo-devel
	- git clone https://github.com/mono/libgdiplus
	- cd libgdiplus
	- ./autogen.sh
	- make
	- make install
	- cd /usr/lib64/
	- ln -s /usr/local/lib/libgdiplus.so gdiplus.dll

### Getting Started

#### Export Excel

```csharp

var newFile = @"newbook.core.xlsx";

using (var fs = new FileStream(newFile, FileMode.Create, FileAccess.Write)) {

    IWorkbook workbook = new XSSFWorkbook();

    ISheet sheet1 = workbook.CreateSheet("Sheet1");

    sheet1.AddMergedRegion(new CellRangeAddress(0, 0, 0, 10));
    var rowIndex = 0;
    IRow row = sheet1.CreateRow(rowIndex);
    row.Height = 30 * 80;
    row.CreateCell(0).SetCellValue("this is content");
    sheet1.AutoSizeColumn(0);
    rowIndex++;

    var sheet2 = workbook.CreateSheet("Sheet2");
    var style1 = workbook.CreateCellStyle();
    style1.FillForegroundColor = HSSFColor.Blue.Index2;
    style1.FillPattern = FillPattern.SolidForeground;

    var style2 = workbook.CreateCellStyle();
    style2.FillForegroundColor = HSSFColor.Yellow.Index2;
    style2.FillPattern = FillPattern.SolidForeground;

    var cell2 = sheet2.CreateRow(0).CreateCell(0);
    cell2.CellStyle = style1;
    cell2.SetCellValue(0);

    cell2 = sheet2.CreateRow(1).CreateCell(0);
    cell2.CellStyle = style2;
    cell2.SetCellValue(1);

    workbook.Write(fs);
}

```

#### Export Word

```csharp
var newFile2 = @"newbook.core.docx";
using (var fs = new FileStream(newFile2, FileMode.Create, FileAccess.Write)) {
    XWPFDocument doc = new XWPFDocument();
    var p0 = doc.CreateParagraph();
    p0.Alignment = ParagraphAlignment.CENTER;
    XWPFRun r0 = p0.CreateRun();
    r0.FontFamily = "microsoft yahei";
    r0.FontSize = 18;
    r0.IsBold = true;
    r0.SetText("This is title");

    var p1 = doc.CreateParagraph();
    p1.Alignment = ParagraphAlignment.LEFT;
    p1.IndentationFirstLine = 500;
    XWPFRun r1 = p1.CreateRun();
    r1.FontFamily = "·ÂËÎ";
    r1.FontSize = 12;
    r1.IsBold = true;
    r1.SetText("This is content, content content content content content content content content content");

    doc.Write(fs);
}

```