How to convert a document from a one format to another within C# and VB.Net

Convert a document to another format within C# and VB.Net

Document .Net can help your application to convert a document from a one format to another.
You'll need only to Load a document and Save to a desired format:


            DocumentCore dc = DocumentCore.Load("...");
            dc.Save("....");

Document .Net supports these formats:

PDF DOCX RTF HTML
Create/Read/Write Create/Read/Write Create/Read/Write Create/Read/Write

Conversion examples:

  1. Convert DOCX to PDF:

                DocumentCore dc = DocumentCore.Load(@"d:\Before.docx");
                dc.Save(@"d:\After.pdf");
    
  2. Convert PDF to DOCX:

                DocumentCore dc = DocumentCore.Load(@"d:\Before.pdf");
                dc.Save(@"d:\After.docx");
    
  3. Convert RTF to HTML:

                DocumentCore dc = DocumentCore.Load(@"d:\Before.rtf");
                dc.Save(@"d:\After.html");
    
  4. Convert DOCX to RTF (in memory):

                byte[] rtfBytes = ....; // Say, get RTF bytes from DB.
                byte[] docxBytes = null;
                using (MemoryStream msRtf = new MemoryStream(rtfBytes))
                {
                    DocumentCore dc = DocumentCore.Load(msRtf, new RtfLoadOptions());
                    using (MemoryStream msDocx = new MemoryStream())
                    {
                        dc.Save(msDocx, new DocxSaveOptions());
                        docxBytes = msDocx.ToArray();
                    }
                }
    
  5. Convert PDF to HTML (with options):

                DocumentCore dc = DocumentCore.Load(@"d:\Before.pdf", 
                    new PdfLoadOptions()
                    {DetectTables=true,
                    ConversionMode = PdfConversionMode.Continuous,
                    PageIndex=0,
                    PageCount=1});
    
                dc.Save(@"d:\After.html", new HtmlFixedSaveOptions()
                {Version = HtmlVersion.Html5,
                CssExportMode = CssExportMode.Inline,
                EmbedImages = true});
    

Furthermore, during the conversion cycle you may replace any element in a document or add something new: digital signature, a watermark, page numbering etc.

 

Complete code

using System.IO;
using SautinSoft.Document;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            ConvertFromFile();
            ConvertFromStream();
        }

        /// <summary>
        /// Convert PDF to DOCX (file to file).
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/examples/convert-document.php
        /// </remarks>
        static void ConvertFromFile()
        {
            string inpFile = @"..\..\example.pdf";
            string outFile = @"Result.docx";

            DocumentCore dc = DocumentCore.Load(inpFile);
            dc.Save(outFile);

            // Open the result for demonstation purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
        }

        /// <summary>
        /// Convert PDF to HTML (using Stream).
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/examples/convert-document.php
        /// </remarks>
        static void ConvertFromStream()
        {

            // We need files only for demonstration purposes.
            // The conversion process will be done completely in memory.
            string inpFile = @"..\..\example.pdf";
            string outFile = @"Result.html";
            byte[] inpData = File.ReadAllBytes(inpFile);
            byte[] outData = null;

            using (MemoryStream msInp = new MemoryStream(inpData))
            {

                // Load a document.
                DocumentCore dc = DocumentCore.Load(msInp, new PdfLoadOptions()
                {
                    PreserveGraphics = true,
                    DetectTables = true
                });

                // Save the document to HTML-fixed format.
                using (MemoryStream outMs = new MemoryStream())
                {
                    dc.Save(outMs, new HtmlFixedSaveOptions()
                    {
                        CssExportMode = CssExportMode.Inline,
                        EmbedImages = true
                    });
                    outData = outMs.ToArray();                    
                }
                // Show the result for demonstation purposes.
                if (outData != null)
                {
                    File.WriteAllBytes(outFile, outData);
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
                }
            }
        }
    }
}

Download.

        
            Imports System
Imports System.IO
Imports SautinSoft.Document

Module Sample
    Sub Main()
        ConvertFromFile()
        ConvertFromStream()
    End Sub

    ''' <summary>
    ''' Convert PDF to DOCX (file to file).
    ''' </summary>
    ''' <remarks>
    ''' Details: https://sautinsoft.com/products/document/examples/convert-document.php
    ''' </remarks>
    Sub ConvertFromFile()
        Dim inpFile As String = "..\example.pdf"
        Dim outFile As String = "Result.docx"

        Dim dc As DocumentCore = DocumentCore.Load(inpFile)
        dc.Save(outFile)

        ' Open the result for demonstation purposes.
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
    End Sub

    ''' <summary>
    ''' Convert PDF to HTML (using Stream).
    ''' </summary>
    ''' <remarks>
    ''' Details: https://sautinsoft.com/products/document/examples/convert-document.php
    ''' </remarks>
    Sub ConvertFromStream()

        ' We need files only for demonstration purposes.
        ' The conversion process will be done completely in memory.
        Dim inpFile As String = "..\example.pdf"
        Dim outFile As String = "Result.html"
        Dim inpData() As Byte = File.ReadAllBytes(inpFile)
        Dim outData() As Byte = Nothing

        Using msInp As New MemoryStream(inpData)

            ' Load a document.
            Dim dc As DocumentCore = DocumentCore.Load(msInp, New PdfLoadOptions() With {
                .PreserveGraphics = True,
                .DetectTables = True
            })

            ' Save the document to HTML-fixed format.
            Using outMs As New MemoryStream()
                dc.Save(outMs, New HtmlFixedSaveOptions() With {
                    .CssExportMode = CssExportMode.Inline,
                    .EmbedImages = True
                })
                outData = outMs.ToArray()
            End Using
            ' Show the result for demonstation purposes.
            If outData IsNot Nothing Then
                File.WriteAllBytes(outFile, outData)
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
            End If
        End Using
    End Sub
End Module

Download.

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