Document Object Model (DOM)

How to load a PDF document in C# and VB.Net

Load from a file:
```
DocumentCore dc = DocumentCore.Load(@"d:\Book.pdf");
```
The dc object represents a document loaded into memory. The file format is detected automatically from the file extension: ".pdf".

After loading you'll get the document presented as the Tree Of Objects, where the root node is DocumentCore class.

To guarantee that a loadable content is really PDF and set some loading options, use PdfLoadOptions as 2nd parameter.
```
DocumentCore dc = DocumentCore.Load(@"d:\Book.pdf", new PdfLoadOptions());
```

Load from a Stream:


            // Assume that we already have a PDF document as bytes array.
            byte[] pdfBytes = null;
            // pdfBytes = ...

            DocumentCore dc = null;
            using (MemoryStream pdfStream = new MemoryStream(pdfBytes))
            {
                dc = DocumentCore.Load(pdfStream, new PdfLoadOptions());
            }
            // Here we can do with our document 'dc' anything we need.

using System.IO;
using SautinSoft.Document;

namespace Example
{
    class Program
    {
       
        static void Main(string[] args)
        {
            LoadPDFFromFile();
            //LoadPDFFromStream();
        }

        // From a file
        static void LoadPDFFromFile()
        {
            string filePath = @"..\..\example.pdf";

            // The file format is detected automatically from the file extension: ".pdf".
            // But as shown in the example below, we can specify PdfLoadOptions as 2nd parameter
            // to explicitly set that a loadable document has PDF format.
            DocumentCore dc = DocumentCore.Load(filePath);
        }

        static void LoadPDFFromStream()
        {
            // Assume that we already have a PDF document as bytes array.
            byte[] fileBytes = File.ReadAllBytes(@"..\..\example.pdf");

            DocumentCore dc = null;

            // Create a MemoryStream
            using (MemoryStream ms = new MemoryStream(fileBytes))
            {
                // Specifying PdfLoadOptions we explicitly set that a loadable document is PDF.
                // Also we specified here to load only 1st page and
                // switched off the 'OptimizeImage' to not merge adjacent images into a one.
                PdfLoadOptions pdfLO = new PdfLoadOptions()
                {
                    PageCount = 1,
                    OptimizeImages = false
                };

                // Load a PDF document from the MemoryStream.
                dc = DocumentCore.Load(ms, new PdfLoadOptions());
            }
        }
    }
}

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            Imports System.IO
Imports SautinSoft.Document

Module ExampleVB

    Sub Main()
        LoadPDFFromFile()
        'LoadPDFFromStream();
    End Sub

    ' From a file
    Public Sub LoadPDFFromFile()
        Dim filePath As String = "..\example.pdf"

        ' The file format is detected automatically from the file extension: ".pdf".
        ' But as shown in the example below, we can specify PdfLoadOptions as 2nd parameter
        ' to explicitly set that a loadable document has PDF format.
        Dim dc As DocumentCore = DocumentCore.Load(filePath)
    End Sub

    Public Sub LoadPDFFromStream()

        ' Get document bytes.
        Dim fileBytes() As Byte = File.ReadAllBytes("..\example.pdf")

        Dim dc As DocumentCore = Nothing

        ' Create a MemoryStream
        Using ms As New MemoryStream(fileBytes)

            ' Specifying PdfLoadOptions we explicitly set that a loadable document is PDF.
            ' Also we specified here to load only 1st page and
            ' switched off the 'OptimizeImage' to not merge adjacent images into a one.
            Dim pdfLO As New PdfLoadOptions() With {
                    .PageCount = 1,
                    .OptimizeImages = False
                }

            ' Load a PDF document from the MemoryStream.
            dc = DocumentCore.Load(ms, New PdfLoadOptions())
        End Using
    End Sub
End Module

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