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  1. 使用 C# 從數據庫文件中提取數據

    數據庫 被認為是大多數應用程序的組成部分。無論是桌面、Web 還是移動應用程序，數據庫在存儲、訪問和操作數據方面都起著至關重要的作用。有許多數據庫管理系統可以為您創建和管理數據庫。 但是，可能會出現這樣一種情況，即您需要一種方法來從數據庫文件(即 .db 文件)中提取數據，而無需安裝數據庫管理系統或編寫 SQL 查詢。在這種情況下，您將如何解析數據庫文件並從中獲取數據？ 在本文中，我將演示如何在不編寫 SQL 查詢的情況下輕鬆地從 SQLite 數據庫中的表中提取數據。我將使用 GroupDocs.Parser for .NET API，它支持通過 ADO.NET。 從 SQLite 數據庫 (.db) 中的表中提取數據的步驟 在 Visual Studio 中創建一個新項目。 從 NuGet 安裝適用於 GroupDocs.Parser for .NET。 添加以下命名空間。 using System; using System.Collections.Generic; using System.IO; using GroupDocs.Parser.Data; using GroupDocs.Parser.Options; 準備連接字符串。 string connectionString = string.Format("Provider=System.Data.Sqlite;Data Source={0};Version=3;", "sqlite.db"); 在 Parser 對像中加載數據庫文件。 using (Parser parser = new Parser(connectionString, new LoadOptions(FileFormat.Database))) { // 你的代碼在這裡 } 使用 Parser.GetToc 方法獲取數據庫中表的列表。 // 獲取表格列表 IEnumerable toc = parser....Format("Provider=System.Data.Sqlite;Data...string connectionString = string.Format("Provider=System.Data.Sqlite;Data...

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  2. GroupDocs.Markdown cho .NET — Xuất tài liệu san...

    Xuất PDF, Word, Excel, HTML và hơn nữa sang Markdown với một API .NET on‑premises. Phiên bản công khai đầu tiên đã được phát hành....MarkdownConverter( "rich-text-formatting.docx" ); // Convert and save..."rich-text-formatting.md" ); File rich-text-formatting.md đã chuyển...

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  3. GroupDocs.Markdown สำหรับ .NET — ส่งออกเอกสารเป...

    ส่งออก PDF, Word, Excel, HTML, และอื่น ๆ ไปยัง Markdown ด้วย .NET API แบบ on‑premises. การปล่อยรุ่นสาธารณะครั้งแรกได้เผยแพร่แล้ว....MarkdownConverter( "rich-text-formatting.docx" ); // Convert and save..."rich-text-formatting.md" ); ไฟล์ rich-text-formatting.md ที่แป...

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  4. exif data in CSharp

    Document Automation APIs to enrich .NET and Java applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, redact, or classify documents of almost all the popular file Formats....EXIF (Exchangeable Image File Format) è lo standard e definisce...

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  5. exif data in CSharp

    Document Automation APIs to enrich .NET and Java applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, redact, or classify documents of almost all the popular file Formats....EXIF (Exchangeable Image File Format) é o padrão e define como armazenar...

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  6. XMP data of HEIC in CSharp

    Document Automation APIs to enrich .NET and Java applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, redact, or classify documents of almost all the popular file Formats....EXIF (Exchangeable Image File Format) é o padrão e define como armazenar...

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  7. Excel to CSV in Java on GroupDocs Blog | Docume...

    Excel to CSV in Java on GroupDocs Blog | Document Automation Solutions for .NET & Java Developers Recent content in Excel to CSV in Java on GroupDocs Blog | Document Automation Solutions for .NET &......XLSX in CSV- und CSV in Excel-Formate innerhalb von Java-Anwendungen...

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  8. Text Watermark to PPT in Java on GroupDocs Blog...

    Text Watermark to PPT in Java on GroupDocs Blog | Document Automation Solutions for .NET & Java Developers Recent content in Text Watermark to PPT in Java on GroupDocs Blog | Document Automation So......PPT-, PPTX-, PPS- und weitere Formate in Java an, indem Sie die ...

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  9. XLS to CSV in Java on GroupDocs Blog | Document...

    XLS to CSV in Java on GroupDocs Blog | Document Automation Solutions for .NET & Java Developers Recent content in XLS to CSV in Java on GroupDocs Blog | Document Automation Solutions for .NET & Jav......XLSX in CSV- und CSV in Excel-Formate innerhalb von Java-Anwendungen...

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  10. exif data of jpeg in java

    Document Automation APIs to enrich .NET and Java applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, redact, or classify documents of almost all the popular file Formats....EXIF ( Exchangeable Image File Format ) 是指定数码相机和扫描仪主要使用的图像和声音格式的标准。...

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