NewLife.Office.Rendering

NewLife.Office - Office Automation Library

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A comprehensive .NET office automation library covering Excel, Word, PPT, PDF and 15+ document formats in one package

Source: https://github.com/NewLifeX/NewLife.Office
NuGet: NewLife.Office (Rendering package: NewLife.Office.Rendering)

Overview

NewLife.Office is a comprehensive .NET office automation library covering Excel (xlsx/xls), Word (docx/doc), PowerPoint (pptx/ppt), PDF, Markdown, RTF, ODS, Email (eml/msg), iCalendar, vCard, EPUB, XPS, and legacy binary formats based on OLE2/BIFF8, backed by the Rendering extension package (documents → images).

• Zero external dependencies: only depends on NewLife.Core, built directly on Open XML (ZIP + XML) / PDF / OLE2 file structures
• Full framework support: net45 / netstandard2.0 / netstandard2.1 / net8.0 / net10.0, with AOT compatibility analysis (IsAotCompatible, zero IL warnings) on net8.0+
• MIT licensed: free with no commercial license risk
• Unified API: NewLife.Office namespace with a consistent API style, low learning cost

CSV read/write is provided by CsvFile in NewLife.Core; this library does not duplicate CSV.

Highlights

• Full format coverage: four core formats + ten lightweight formats + OLE2/BIFF8 legacy formats, all in one library
• Zero external dependencies: operates directly on file structures, package size <500KB
• High-fidelity roundtrip: L2/L3 fidelity architecture (model + RawXml/part passthrough), read → modify → write without losing formatting
• Markdown conversion hub: bidirectional MD↔docx/PDF/HTML/Excel/PPT/Word conversion, a unified entry for AI knowledge base ingestion
• Rendering extension: NewLife.Office.Rendering (separate NuGet) provides document → image rendering, image processing, and QR codes
• AOT/cross-platform: zero IL warnings on net8.0 / net10.0; CI covers win-x64 / win-x86 / win-arm64 / linux-x64 / linux-arm64 / osx-x64 / osx-arm64 / linux-loongarch64 (LoongArch via QEMU), with 23 AOT smoke scenarios including all 31 language tables
• 31-language localization: exception messages, document output labels and assembly metadata are translated for the current culture and fall back to English; Locales/*.yml are compiled into the assembly and work under NativeAOT

Supported Formats

Quick Start

Unified Text / Markdown Extraction

using NewLife.Office;

// One-liner: extract plain text from any supported format
String? text = OfficeFactory.ReadText("document.docx");
String? text2 = OfficeFactory.ReadText("report.xlsx");

// Extract as Markdown (preserves structure)
String? md = OfficeFactory.ReadMarkdown("slides.pptx");

// doc (97-2003) → docx conversion
OfficeFactory.ConvertDocToDocx("legacy.doc", "legacy.docx");

Command-Line Tool (NewLife.Office.Cli)

# Any office document → Markdown
dotnet run --project NewLife.Office.Cli -- convert input.docx output.md

# doc (97-2003) → docx (legacy document migration)
dotnet run --project NewLife.Office.Cli -- doc2docx legacy.doc legacy.docx

Excel Write and Read

using NewLife.Office;

using var ms = new MemoryStream();
var writer = new ExcelWriter(ms);
writer.WriteHeader("Data", new[] { "编号", "姓名", "金额" }, CellStyle.Header);
writer.WriteRow("Data", new Object?[] { 1, "张三", 1234.56m }, new CellStyle
{
    Border = CellBorderStyle.Thin,
    NumberFormat = "#,##0.00",
});
writer.Save();

ms.Position = 0;
var reader = new ExcelReader(ms, Encoding.UTF8);
var rows = reader.ReadRows("Data").ToList();

More capabilities (object mapping import/export, template fill, format conversion, rendering, etc.) see Requirements and the source examples.

Documentation

• Requirements
• Feature List
• Architecture
• Competitive Analysis
• ChangeLog

Ecosystem Map

NewLife is a layered ecosystem of independently versioned open-source projects. The map below is shared verbatim by every NewLife repository; each project links to its repository and its primary NuGet package.

Project	What it does	Downloads
Foundation
NewLife.Core	Logging, configuration, caching, networking, serialization, scheduling and APM tracing.
NewLife.XCode	Data middleware: single tables at the tens-of-billions scale, automatic sharding, read-write splitting, 10+ databases.
NewLife.Net	High-performance network library: 1.77M pps / 14.5 Gbps on a single machine (TCP 1KB, 2026-10), 4M long-lived TCP connections.
NewLife.Remoting	Protocol communication and RPC framework for client/server applications and IoT devices.
NewLife.Agent	Installs .NET applications as OS daemons: Windows services and Linux systemd.
NewLife.Templates	dotnet new project templates for console, web, API, service, data and IoT projects.
Data & Messaging
NewLife.Redis	Redis client with microsecond latency, millions of ops/s and built-in message queues.
NewLife.RocketMQ	Pure managed RocketMQ client for Apache RocketMQ and Alibaba Cloud Message Queue.
NewLife.MQTT	MQTT client and server, including Alibaba Cloud IoT connectivity.
NewLife.NovaDb	Hybrid database in C#: embedded or networked, relational, time-series, message queue and KV in one.
NewLife.MySql	MySql driver and helper layer built on the NewLife data stack.
Web, AI & Distributed
NewLife.Cube	Rapid admin-platform framework: permissions, SSO, OAuth server and CRUD scaffolding.
Stardust	Distributed service platform: node management, APM, configuration center, registry and release center.
AntJob	Distributed task and real-time data scheduling platform with sharding, retries and backfill.
NewLife.AI	Unified client for 46 LLM providers plus ChatAI, a ready-to-run web chat application.
Industrial & IoT
NewLife.IoT	IoT standard library defining protocol contracts and device abstractions.
NewLife.Modbus	Modbus TCP/RTU/ASCII implementation on top of NewLife.IoT.
NewLife.Siemens	Siemens PLC protocol on top of NewLife.IoT.
NewLife.Omron	Omron PLC protocol on top of NewLife.IoT.
NewLife.Melsec	Mitsubishi Melsec PLC protocol on top of NewLife.IoT.
NewLife.OPC	OPC client for industrial data access.	—
NewLife.BACnet	BACnet building-automation protocol stack.
ZeroIoT	Lightweight open-source IoT platform with gateway and device management.	—
Vehicle Telematics
NewLife.JT808	JT/T 808 vehicle positioning protocol: 70+ message bodies, 2011/2013/2019.
NewLife.JT809	JT/T 809 platform-to-platform protocol for transport authorities.
NewLife.JT1078	JT/T 1078 in-vehicle video: RTP parsing, FLV/fMP4 remuxing and live streaming.
Domain Components
NewLife.Office	One package for Excel, Word, PPT, PDF and 15+ document formats.
NewLife.Audio	Cross-platform audio: codecs, device I/O, DSP, containers and streaming.
NewLife.Video	Video codecs, container formats, frame processing and streaming.
NewLife.Map	Unified interface over Baidu, AMap, Tencent and Tianditu with geocoding and coordinate conversion.
NewLife.IP	IPv4 geolocation with an offline memory-mapped database and an online API fallback.
Tools & Products
CrazyCoder	Developer toolbox: network, serial port, crypto, regex, Modbus and MQTT.
GitCandy	Self-hosted Git source code management system.	—
LuckyClover	Installs the matching .NET runtime automatically when launched from an older host.	—

Badges show the primary package of each project; theme, extension and satellite packages are listed on their NuGet pages.The 30+ packages not listed here (FTP, LoRa, Office extensions, protocol drivers and more) are available under the NewLifeX organization and on newlifex.com.

Team

Founded in 2002, the NewLife team has spent more than two decades on the .NET and IoT ecosystem, maintains nearly 100 open-source projects (34 of them core to this map), and delivers integrated software and hardware solutions for power, logistics, healthcare, industrial control and internet industries. We live by the motto "learning has no seniority — mastery earns respect".

Open-source components have been downloaded 6.48M times from NuGet (ecosystem-wide, as of 2026-10).

Website: https://newlifex.com · Open source organization: https://github.com/NewLifeX

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