Click or drag to resize

PdfVisionMergePdf(ListByte) Method

Merges different PDF documents into single PDF in memory

Namespace: SautinSoft.PdfVision
Assembly: SautinSoft.PdfVision (in SautinSoft.PdfVision.dll) Version: 2024.12.6
Syntax
public byte[] MergePdf(
	List<byte[]> pdfBytesCollection
)

Parameters

pdfBytesCollection  ListByte
List which contains PDF documents as array of bytes.

Return Value

Byte
Single PDF document as byte array - in case of merging successfully
null - in case of merging failed
Example
How to merge PDF in memory in C#
using System;
using System.IO;
using System.Collections.Generic;
using SautinSoft.PdfVision;

namespace Sample
{
    class Program
    {
        static void Main(string[] args)
        {
            MergePdfInMemory();
        }
        public static void MergePdfInMemory()
        {
            // Before starting, we recommend to get a free 100-day key:
            // https://sautinsoft.com/start-for-free/

            // Apply the key here:
            // SautinSoft.PdfVision.SetLicense("...");
            PdfVision v = new PdfVision();
            // The whole merge process will be done in memory.
            // We're using files only to get input data and show the result.
            string[] inpFiles = new string[] {@"..\..\..\simple text.pdf", @"..\..\..\table.pdf"};
            string outFile = new FileInfo("Result.pdf").FullName;

            // Get bytes from input pdf documents.
            List<byte[]> mergingPdf = new List<byte[]>();
            foreach (string inpFile in inpFiles)
                mergingPdf.Add(File.ReadAllBytes(inpFile));

            // Merge PDF documents in memory into single document.
            byte[] singlePdf = v.MergePdf(mergingPdf);

            if (singlePdf!= null)
            {
                File.WriteAllBytes(outFile, singlePdf);
                // Open the resulting PDF document in a default PDF Viewer.
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
            }
        }
    }
}
How to merge PDF in memory in VB.Net
Imports System
Imports System.IO
Imports System.Collections.Generic
Imports SautinSoft.PdfVision

Namespace Sample
    Friend Class Program
        Shared Sub Main(ByVal args() As String)
            MergePdfInMemory()
        End Sub
        Public Shared Sub MergePdfInMemory()
        ' Before starting, we recommend to get a free 100-day key:
            ' https://sautinsoft.com/start-for-free/

            ' Apply the key here:
            ' SautinSoft.PdfVision.SetLicense("...");
            Dim v As New PdfVision()
            ' The whole merge process will be done in memory.
            ' We're using files only to get input data and show the result.
            Dim inpFiles() As String = {"..\..\..\simple text.pdf", "..\..\..\table.pdf"}
            Dim outFile As String = (New FileInfo("Result.pdf")).FullName

            ' Get bytes from input pdf documents.
            Dim mergingPdf As New List(Of Byte())()
            For Each inpFile As String In inpFiles
                mergingPdf.Add(File.ReadAllBytes(inpFile))
            Next inpFile

            ' Merge PDF documents in memory into single document.
            Dim singlePdf() As Byte = v.MergePdf(mergingPdf)

            If singlePdf IsNot Nothing Then
                File.WriteAllBytes(outFile, singlePdf)
                ' Open the resulting PDF document in a default PDF Viewer.
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
            End If
        End Sub
    End Class
End Namespace
See Also