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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.... 从 NuGet 安装 GroupDocs.Parser for .NET...

    blog.groupdocs.com/zh/parser/extract-data-from-...
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  2. Change Page Orientation of Word Document in C# ...

    Change the orientation of pages in Word DOC/DOCX documents using C#. Set pages as portrait or landscape within .NET applications using GroupDocs....NET application via NuGet . PM> Install-Package GroupDocs...

    blog.groupdocs.com/merger/change-page-orientati...
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  3. Add Watermark to Images in C# | Text & Image Wa...

    C# ways to add text to image as watermark, or add image watermarks to PNG, JPG/JPEG, WebP, GIF, TIFF, BMP images using .NET Watermarking API by GroupDocs....downloads section or get it from NuGet . Install-Package GroupDocs...

    blog.groupdocs.com/watermark/add-watermark-to-i...
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  4. Convert PDF to Grayscale JPG & PNG Images using C#

    Transform PDF documents to grayscale JPG or PNG images in C#. Apply gamma, manage contrast or control brightness within .NET application....NET application via NuGet . PM> Install-Package GroupDocs...

    blog.groupdocs.com/conversion/convert-pdf-to-gr...
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  5. Scan QR Code from PDF using C#

    This article offers a guide on how to extract QR Code from PDF in C#, including a code example that demonstrates how to effectively scan QR Code from PDF using C#....can be easily installed via NuGet Package Manager to extract QR...

    kb.groupdocs.com/parser/net/scan-qrcode-from-pd...
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  6. Extract Images from PPTX using C#

    Learn how to extract images from PPTX using C# with a step-by-step guide. This tutorial provides C# code to extract images from PPTX files efficiently for your projects....library in your C# project via NuGet to enable the functionality...

    kb.groupdocs.com/parser/net/extract-images-from...
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  7. How to run examples | GroupDocs

    Learn how to run C# examples which contain creating a watermark, removing watermark, adding watermark to photos, removing watermark from photo and many more examples....NET from Nuget or official GroupDocs website...

    docs.groupdocs.com/watermark/net/how-to-run-exa...
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  8. How to merge images to JPEG using C# | GroupDocs

    Learn how to merge images to JPEG file, combine images into one JPEG file programmatically in C# language using GroupDocs.Merger for .NET library....API DLLs or MSI installer or NuGet: PM > Install - Package GroupDocs...

    docs.groupdocs.com/merger/net/getting-started/u...
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  9. How to Run Examples | GroupDocs

    Learn how to run C# examples which contain many examples of data redaction. You can learn redact in word, how to redact information in pdf or images and many more....NET **from Nuget or official GroupDocs website...

    docs.groupdocs.com/redaction/net/how-to-run-exa...
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  10. Topics tagged csharp

    Topics tagged csharp...9 99 March 12, 2025 Upgrade NuGet Package "GroupDocs.Watermark"...

    forum.groupdocs.com/tag/csharp
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