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C# PDF - Create, Load and Save PDF File

Detailed Guide for PDF Document Creating, Loading and Saving in C# Project

Visual C#
VB.NET
Home > .NET Imaging SDK > C# > Create, Load and Save PDF Document

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.NET PDF document processing add-on (RasterEdge.Imaging.PDF.dll) from RasterEdge DocImage SDK for .NET is one of those strongly-featured and mature imaging library assemblies for C# programming, which is designed to help developers implement PDF-related tasks in their C#.NET document imaging applications.
On this page, you will learn C#.NET PDF document processing classes, object, as well as C#.NET APIs and sample codes for PDF document creating, loading and saving. Before using mature functions of .NET PDF Document Processing Control in C# project, you should reference PDF processing dll (RasterEdge.Imaging.PDF.dll) and other necessary assemblies (like RasterEdge.Imaging.Basic) to your C#.NET project.
PDF Programming Classes in C#.NET
Before you move on to how to create, load and save PDF document in Visual C# programs, you may firstly learn PDF programming classes. In all, PDF document assembly provides two PDF document processing classes, which are PDFDocument and PDFPage.
  • PDFDocument: This class refers to PDF document and it contains all document information of PDF file. It is an extension of BaseDocument. C# programmers can use PDFDocument object to do bulk operations like load, save, convert images/document and lookup metadata.
  • PDFPage: This class refers to PDF document page contained in PDFDocument and uses BasePage as prototype. By storing page information, C# programmers can get images or svg file out of PDFPage. Also annotations can be added onto PDFPage and saved in a document file format.
PDF Document Object in C#.NET
In C#.NET PDF Document DLL Library, PDFDocument represents the main structure of a document and the pages it contains. When a PDFDocument object is created, C# developers can easily extract information about pages and other document structures. In the following parts, you will be guided to generate, load and save PDF document in C# application.
How to Create and Load a PDFDocument Object in C#
The examples that follows illustrate how to use different sources to generate a PDFDocument object in Visual C# project.

Create and Load a PDFDocument Object from Stream

PDFDocument doc = new PDFDocument(Stream s);

Create and Load a PDFDocument Object from File Path

PDFDocument doc = new PDFDocument(@"D:\BugList\sample1.pdf");

Create and Load a PDFDocument Object from Image Collection

// related API
public PDFDocument(REImage[] imageSource);
Once you have created a PDF document object, you can use the C# sample code below to get the number of pages of this object.
public int GetPageCount(Stream s)
{
PDFDocument document = new PDFDocument(s);
return document.GetPageCount();
}
How to Save PDFDocument to File or Stream in C#
If you have a PDFDocument object and have done modification onto it (for example add annotations to page in the document), you can save it back to a PDF file or stream. And following APIs will be used to achieve PDF document saving in C#.NET project.
void Save(String fileName);
void SaveToStream(Stream stream);
byte[] SaveToBytes();


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