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  1. 使用 C# 从数据库文件中提取数据

    数据库 被认为是大多数应用程序的组成部分。无论是桌面、Web 还是移动应用程序，数据库在存储、访问和操作数据方面都发挥着至关重要的作用。有许多数据库管理系统允许为您创建和管理数据库。 然而，当您需要一种从数据库文件(即 .db 文件) 中提取数据的方法时，可能会出现这样的情况，而无需安装数据库管理系统或编写 SQL 查询。在这种情况下，您将如何解析数据库文件并从中获取数据？ 在本文中，我将演示如何轻松地从 SQLite 数据库中的表中提取数据，而无需编写 SQL 查询。我将使用 GroupDocs.Parser for .NET API，它支持通过 [ADO.NET](https://en.wikipedia. org/wiki/ADO.NET) 。 从 SQLite 数据库 (.db) 中的表中提取数据的步骤 1. 在 Visual Studio 中创建一个新项目。 2. 从 NuGet 安装 GroupDocs.Parser for .NET。 3. 添加以下命名空间。 using System; using System.Collections.Generic; using System.IO; using GroupDocs.Parser.Data; using GroupDocs.Parser.Options; 4. 准备连接字符串。 string connectionString = string.Format("Provider=System.Data.Sqlite;Data Source={0};Version=3;", "sqlite.db"); 5. 在 Parser 对象中加载数据库文件。 using (Parser parser = new Parser(connectionString, new LoadOptions(FileFormat.Database))) { // 你的代码在这里 } 6....无论是桌面、Web 还是移动应用程序，数据库在存储、访问和操作数据方面都发挥...

    blog.groupdocs.com/zh/parser/extract-data-from-...
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  2. Render archives as HTML, PDF, and image files (...

    This topic describes how to use the GroupDocs.Viewer Java API to convert archive files to HTML, PDF, PNG, and JPEG formats....within your Java application (web or desktop). To start using the...navigation bar at the top of the web page. Render archive files as...

    docs.groupdocs.com/viewer/java/old-render-archi...
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  3. GroupDocs Blog

    GroupDocs Blog - GroupDocs Blog | Document Automation Solutions for .NET & Java Developers...conversions within your desktop or web-based applications. For the data...

    blog.groupdocs.com/groupdocs.blog/page/31/
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  4. GroupDocs Blog

    GroupDocs Blog - GroupDocs Blog | Document Automation Solutions for .NET & Java Developers...choices to interchange data in web services. With this huge usage...

    blog.groupdocs.com/groupdocs.blog/page/19/
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  5. Convert to Spreadsheet in C# | PDF to Excel | W...

    Convert PDF to Excel (XLS, XLSX) or convert DOC, DOCX to Excel spreadsheet in C# using document conversion API for .NET. Build your own Conversion App....drawings, eBooks, PDF, email files, Web pages, images, photoshop files...

    blog.groupdocs.com/conversion/convert-document-...
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  6. Add annotation to the document | GroupDocs

    The page describes document annotations of different types and how to add annotations to a document using GroupDocs.Annotation API.... Represents a web-link that can be applied to the...

    docs.groupdocs.com/annotation/java/add-annotati...
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  7. Convert TXT to ODT using Node.js

    Convert TXT to ODT using Node.js for fast and accurate document transformation. This guide also shows the steps of how to export TXT to ODT in Node.js with ease....resource if you want to handle web-friendly document formats in...

    kb.groupdocs.com/conversion/nodejs/convert-txt-...
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  8. Render DOCX to JPG using Node.js

    This topic explains how to render DOCX to JPG using Node.js with code example. There is no need to install any extra softwares to render DOCX to JPG in Node.js....can be easily embedded into web apps, shared via APIs, or stored...

    kb.groupdocs.com/viewer/nodejs/render-docx-to-j...
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  9. Convert SVG to PNG in Java - Vector Graphics to...

    Convert SVG vector graphics to PNG images using Java. Rotate, flip, watermark, grayscale, and adjust brightness & gamma of converted PNG using Java API....These images are mainly used on web because of the high pixel density...

    blog.groupdocs.com/conversion/convert-svg-to-pn...
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  10. Supported File Formats | GroupDocs

    This topic lists file formats supported by GroupDocs.Total for Python via .NET....a wide variety of formats in web or desktop apps. Comparison supports...

    docs.groupdocs.com/total/python-net/supported-d...
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