NPOI

This project is migrated from Tony Qu's 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

NuGet Package

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

• Docker

  • Alpine

  # base sdk-alpine/aspnetcore-runtime-alpine images
  
  RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
  RUN apk --update add libgdiplus
  

Getting Started

Export Excel

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

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);
}