pdf library c#: Extract data from pdf file software application cloud windows winforms html class PDF-Converter-Services---User-Guide-(1)8-part1802

PDF Converter Services - User & Developer Guide

PDF Converter Services - User & Developer Guide - Version 8.0 - 07/12/15

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4.12 Controlling which InfoPath views to Export to PDF

Being able to select which views to export is very useful as quite often different

views are used for exporting a form to PDF. Sometimes using the Print View is

good enough, but other times you need to export a different view or multiple

views to PDF format. There are even occasions where different views are

exported depending on the state of the data entered in the form.

As always, the best way to illustrate this is by example. The latest version of

this tutorial is available on the Muhimbi Blog at the following URL:

http://blog.muhimbi.com/2010/08/controlling-which-views-to-export-to.html

4.12.1 Use a special view for exporting to PDF

In this scenario we have an Employee Review form with the following 3 views:

1. Data entry view: A view used for populating data using the InfoPath client

or Forms Services. This is the default view.

2. Print View: A special view that is optimised for printing to a network laser

printer. This is specified as View 1’s Print View.

3. PDF Export view: A separate view that is used to export the InfoPath form

to PDF format as it contains some information that should only show up in

exported PDF files.

As View 1 is the default view and View 2 is the Print View for View 1, under

normal circumstance the 2nd view is used for exporting to PDF. However, we

want to use View 3 for this purpose. We can achieve this by starting the name

of View 3 with “_MuhimbiView”. The Muhimbi PDF Converter will automatically

detect all views that start with this name, export them all and merge them

together into a single PDF file. Naturally these views can be hidden from the

end user by marking them as such.

This is a great solution if you know beforehand that you will always be

exporting the same view(s) to PDF format.

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4.12.2 Determine at runtime which views to export

The previous solution, using view names that start with “_MuhimbiView”, works

great. However, sometimes you need to export a different view depending on

the state of the data.

For example, our Expense Claim form consists of the following Views:

1. Data Entry View 1: Used by the employee to report expenses.

2. Data Entry View 2: Used by the manager to add comments and additional

information.

3. PDF Export View 1: The view that is used to export the form to PDF format

before the manager has reviewed the form.

4. PDF Export View 2: The view that is used to export the form to PDF format

after the manager has reviewed the form.

We can implement this by adding a (hidden) text box named “_MuhimbiViews”

(case sensitive

and using the default ‘my’ namespace

) to any of the views

and populating it with the name of one or more comma separated view names.

The Muhimbi PDF Converter will automatically pick up these names and export

them to PDF format. If multiple views are specified then they are automatically

concatenated together.

In addition to adding the “_MuhimbiViews” text field to the form, all the

developer of the form needs to do is add a little bit of logic to the Submit event

to specify in the “_MuhimbiViews” field which view name(s) to export.

4.12.3 View prioritisation rules

To determine which view or views to export, the Muhimbi PDF Converter uses

the following prioritisation rules:

1. When using the web services interface, any ConversionViews specified in

the ConverterSpecificSettings property will be converted. If this property is

not set then the following rules will be used to determine which views to

convert to PDF.

If a field named “_MuhimbiViews” is found anywhere in the InfoPath form

then the content of this field is used to determine which views to export.

3. If the previous field does not exist, is empty or the specified view name

does not exist then the converter looks at all view names that start with

“_MuhimbiView”.

4. If none of the previous options apply then the view marked as the Default

View is exported.

Regardless of how a view or views are selected for export, if the selected view

has a Print View specified than that view is given priority.

Do not use Muhimbi’s View selection features in combination with InfoPath's

'Print multiple views' facility. The latter is given priority when converting to PDF.

When the final PDF file is assembled then all selected views are included first,

followed by any converted attachments

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5 Working with watermarks

As described in chapter 3.5 Watermarking, the PDF Conversion Service

contains a powerful watermarking engine that can be used to add visible and

invisible watermarks to pages as well as adding headers, footers and other

recurring items.

5.1 Watermarking in .NET

The following C# example shows how to decorate a document with the

following watermarks:

1. T

he word ‘Confidential’

in the background of the cover page.

2. Page numbers in the right-hand side of the footer on all even pages.

3. Page numbers in the left-hand side of the footer on all odd pages.

The sample code expects the path of the PDF file on the command line. If the

path is omitted then the first MS-Word file found in the current directory will be

used.

Follow the steps described below to create the sample watermarking

application.

1. Create a new Visual Studio C# Console application named Watermarking.

2. Add a Service Reference to the following URL and specify

ConversionService as the namespace

http://localhost:41734/Muhimbi.DocumentConverter.WebService/?wsdl

3. Paste the following code into Program.cs. Note that this code is practically

identical to the sample provided in a previous chapter, with the exception of

the CreateWatermarks method and the line that assigns the watermarks to

the ConversionSettings object.

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PDF Converter Services - User & Developer Guide

PDF Converter Services - User & Developer Guide - Version 8.0 - 07/12/15

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using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.IO;

using System.ServiceModel;

using Watermarking.ConversionService;

namespace Watermarking

{

class Program

{

// ** The URL where the Web Service is located. Amend host name if needed.

static string SERVICE_URL = "http://localhost:41734/Muhimbi.DocumentConverter.WebService/";

static void Main(string[] args)

{

DocumentConverterServiceClient client = null;

try

{

// ** Determine the source file and read it into a byte array.

string sourceFileName = null;

if (args.Length == 0)

{

string[] sourceFiles = Directory.GetFiles(

Directory.GetCurrentDirectory(), "*.doc");

if (sourceFiles.Length > 0)

sourceFileName = sourceFiles[0];

else

{

Console.WriteLine("Please specify a document to convert and watermark.");

Console.ReadKey();

return;

}

else

sourceFileName = args[0];

byte[] sourceFile = File.ReadAllBytes(sourceFileName);

// ** Open the service and configure the bindings

client = OpenService(SERVICE_URL);

//** Set the absolute minimum open options

OpenOptions openOptions = new OpenOptions();

openOptions.OriginalFileName = Path.GetFileName(sourceFileName);

openOptions.FileExtension = Path.GetExtension(sourceFileName);

// ** Set the absolute minimum conversion settings.

ConversionSettings conversionSettings = new ConversionSettings();

conversionSettings.Fidelity = ConversionFidelities.Full;

conversionSettings.Quality = ConversionQuality.OptimizeForPrint;

// ** Get the list of watermarks to apply.

conversionSettings.Watermarks = CreateWatermarks();

// ** Carry out the conversion.

Console.WriteLine("Converting file " + sourceFileName);

byte[] convFile = client.Convert(sourceFile, openOptions, conversionSettings);

// ** Write the converted file back to the file system with a PDF extension.

string destinationFileName = Path.GetDirectoryName(sourceFileName) + @"\" +

Path.GetFileNameWithoutExtension(sourceFileName) +

"." + conversionSettings.Format;

using (FileStream fs = File.Create(destinationFileName))

{

fs.Write(convFile, 0, convFile.Length);

fs.Close();

}

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PDF Converter Services - User & Developer Guide

PDF Converter Services - User & Developer Guide - Version 8.0 - 07/12/15

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Console.WriteLine("File converted to " + destinationFileName);

// ** Open the generated PDF file in a PDF Reader

Process.Start(destinationFileName);

}

catch (FaultException<WebServiceFaultException> ex)

{

Console.WriteLine("FaultException occurred: ExceptionType: " +

ex.Detail.ExceptionType.ToString());

}

catch (Exception ex)

{

Console.WriteLine(ex.ToString());

}

finally

{

CloseService(client);

}

Console.ReadKey();

}

/// <summary>

/// Create the watermarks.

/// </summary>

/// <returns>An array of watermarks to apply</returns>

public static Watermark[] CreateWatermarks()

{

List<Watermark> watermarks = new List<Watermark>();

// ** Specify the default settings for properties

Defaults wmDefaults = new Defaults();

wmDefaults.FillColor = "#000000";

wmDefaults.LineColor = "#000000";

wmDefaults.FontFamilyName = "Arial";

wmDefaults.FontSize = "10";

// **************** 'Confidential' Text ***************

// ** 'Confidential' watermark for front page

Watermark confidential = new Watermark();

confidential.Defaults = wmDefaults;

confidential.StartPage = 1;

confidential.EndPage = 1;

confidential.Rotation = "-45";

confidential.Width = "500";

confidential.Height = "500";

confidential.HPosition = HPosition.Center;

confidential.VPosition = VPosition.Middle;

confidential.ZOrder = -1;

// ** Create a new Text element that goes inside the watermark

Text cfText = new Text();

cfText.Content = "Confidential";

cfText.FontSize = "40";

cfText.Width = "500";

cfText.Height = "500";

cfText.Transparency = "0.10";

// ** And add it to the list of watermark elements.

confidential.Elements = new Element[] { cfText };

// ** And add the watermark to the list of watermarks

watermarks.Add(confidential);

// **************** Watermark for Odd pages ***************

Watermark oddPages = new Watermark();

oddPages.Defaults = wmDefaults;

oddPages.StartPage = 3;

oddPages.PageInterval = 2;

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PDF Converter Services - User & Developer Guide

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oddPages.Width = "600";

oddPages.Height = "50";

oddPages.HPosition = HPosition.Right;

oddPages.VPosition = VPosition.Bottom;

// ** Add a horizontal line

Line line = new Line();

line.X = "1";

line.Y = "1";

line.EndX = "600";

line.EndY = "1";

line.Width = "5";

// ** Add a page counter

Text oddText = new Text();

oddText.Content = "Page: {PAGE} of {NUMPAGES}";

oddText.Width = "100";

oddText.Height = "20";

oddText.X = "475";

oddText.Y = "15";

oddText.LineWidth = "-1";

oddText.FontStyle = FontStyle.Regular;

oddText.HAlign = HAlign.Right;

// ** And add it to the list of watermark elements

oddPages.Elements = new Element[] { line, oddText };

// ** And add the watermark to the list of watermarks

watermarks.Add(oddPages);

// **************** Watermark for Even pages ***************

Watermark evenPages = new Watermark();

evenPages.Defaults = wmDefaults;

evenPages.StartPage = 2;

evenPages.PageInterval = 2;

evenPages.Width = "600";

evenPages.Height = "50";

evenPages.HPosition = HPosition.Left;

evenPages.VPosition = VPosition.Bottom;

// ** No need to create an additional line,re-use the previous one

// ** Add a page counter

Text evenText = new Text();

evenText.Content = "Page: {PAGE} of {NUMPAGES}";

evenText.Width = "100";

evenText.Height = "20";

evenText.X = "25";

evenText.Y = "15";

evenText.LineWidth = "-1";

evenText.FontStyle = FontStyle.Regular;

evenText.HAlign = HAlign.Left;

// ** And add it to the list of watermark elements

evenPages.Elements = new Element[] { line, evenText };

// ** And add the watermark to the list of watermarks

watermarks.Add(evenPages);

return watermarks.ToArray();

}

/// <summary>

/// Configure the Bindings, endpoints and open the service using the specified address.

/// </summary>

/// <returns>An instance of the Web Service.</returns>

public static DocumentConverterServiceClient OpenService(string address)

{

DocumentConverterServiceClient client = null;

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try

{

BasicHttpBinding binding = new BasicHttpBinding();

// ** Use standard Windows Security.

binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;

binding.Security.Transport.ClientCredentialType =

HttpClientCredentialType.Windows;

// ** Increase the client Timeout to deal with (very) long running requests.

binding.SendTimeout = TimeSpan.FromMinutes(30);

binding.ReceiveTimeout = TimeSpan.FromMinutes(30);

// ** Set the maximum document size to 50MB

binding.MaxReceivedMessageSize = 50 * 1024 * 1024;

binding.ReaderQuotas.MaxArrayLength = 50 * 1024 * 1024;

binding.ReaderQuotas.MaxStringContentLength = 50 * 1024 * 1024;

// ** Specify an identity (any identity) in order to get it past .net3.5 sp1

EndpointIdentity epi = EndpointIdentity.CreateUpnIdentity("unknown");

EndpointAddress epa = new EndpointAddress(new Uri(address), epi);

client = new DocumentConverterServiceClient(binding, epa);

client.Open();

return client;

}

catch (Exception)

{

CloseService(client);

throw;

}

/// <summary>

/// Check if the client is open and then close it.

/// </summary>

/// <param name="client">The client to close</param>

public static void CloseService(DocumentConverterServiceClient client)

{

if (client != null && client.State == CommunicationState.Opened)

client.Close();

}

4. Make sure the output folder contains an MS-Word file.

5. Compile and execute the application.

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5.2 Watermarking in Java

The following Java based sample code is identical to the example provided in

section 4.2 with the exception that the Watermarks property in the

ConversionSettings class is now populated with a simple watermark that prints

the word ‘Confidential’ on the front page in combination with the current date.

For details on how to setup your Java environment and generate the Web

Service proxies see the before mentioned section 4.2

package com.muhimbi.app;

import com.muhimbi.ws.*;

import java.io.*;

import java.net.URL;

import java.util.List;

import javax.xml.bind.JAXBElement;

import javax.xml.namespace.QName;

public class WsClient {

private final static String DOCUMENTCONVERTERSERVICE_WSDL_LOCATION =

"http://localhost:41734/Muhimbi.DocumentConverter.WebService/?wsdl";

public static void main(String[] args) {

try {

if (args.length != 1) {

System.out.println("Please specify a single file name on the command line.");

} else {

// ** Process command line parameters

String sourceDocumentPath = args[0];

File file = new File(sourceDocumentPath);

String fileName = getFileName(file);

String fileExt = getFileExtension(file);

System.out.println("Converting file " + sourceDocumentPath);

// ** Initialise Web Service

DocumentConverterService_Service dcss = new DocumentConverterService_Service(

new URL(DOCUMENTCONVERTERSERVICE_WSDL_LOCATION),

new QName("http://tempuri.org/", "DocumentConverterService"));

DocumentConverterService dcs = dcss.getBasicHttpBindingDocumentConverterService();

// ** Only call conversion if file extension is supported

if (isFileExtensionSupported(fileExt, dcs)) {

// ** Read source file from disk

byte[] fileContent = readFile(sourceDocumentPath);

// ** Converting the file

OpenOptions openOptions = getOpenOptions(fileName, fileExt);

ConversionSettings conversionSettings = getConversionSettings();

byte[] convertedFile = dcs.convert(fileContent, openOptions, conversionSettings);

// ** Writing converted file to file system

String destinationDocumentPath = getPDFDocumentPath(file);

writeFile(convertedFile, destinationDocumentPath);

System.out.println("File converted sucessfully to " + destinationDocumentPath);

} else {

System.out.println("The file extension is not supported.");

}

} catch (IOException e) {

System.out.println(e.getMessage());

} catch (DocumentConverterServiceGetConfigurationWebServiceFaultExceptionFaultFaultMessage e){

printException(e.getFaultInfo());

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} catch (DocumentConverterServiceConvertWebServiceFaultExceptionFaultFaultMessage e) {

printException(e.getFaultInfo());

}

public static OpenOptions getOpenOptions(String fileName, String fileExtension) {

ObjectFactory objectFactory = new ObjectFactory();

OpenOptions openOptions = new OpenOptions();

// ** Set the minimum required open options. Additional options are available

openOptions.setOriginalFileName(objectFactory.createOpenOptionsOriginalFileName(fileName));

openOptions.setFileExtension(objectFactory.createOpenOptionsFileExtension(fileExtension));

return openOptions;

}

public static ConversionSettings getConversionSettings() {

ConversionSettings conversionSettings = new ConversionSettings();

// ** Set the minimum required conversion settings. Additional settings are available

conversionSettings.setQuality(ConversionQuality.OPTIMIZE_FOR_PRINT);

conversionSettings.setRange(ConversionRange.ALL_DOCUMENTS);

conversionSettings.getFidelity().add("Full");

conversionSettings.setFormat(OutputFormat.PDF);

conversionSettings.setWatermarks(getWatermarks());

return conversionSettings;

}

public static JAXBElement<ArrayOfWatermark> getWatermarks()

{

ObjectFactory objectFactory = new ObjectFactory();

ArrayOfWatermark watermarks = new ArrayOfWatermark();

// ** Specify some of the default settings for properties

Defaults wmDefaults = new Defaults();

wmDefaults.setFillColor(objectFactory.createDefaultsFillColor("#FF0000"));

wmDefaults.setFontFamilyName(objectFactory.createDefaultsFontFamilyName("Arial"));

// ** 'Confidential' watermark for front page

Watermark confidential = new Watermark();

confidential.setDefaults(objectFactory.createContainerDefaults(wmDefaults));

confidential.setStartPage(1);

confidential.setEndPage(1);

confidential.setRotation(objectFactory.createElementRotation("-15"));

confidential.setWidth(objectFactory.createElementWidth("500"));

confidential.setHeight(objectFactory.createElementHeight("250"));

confidential.setHPosition(HPosition.CENTER);

confidential.setVPosition(VPosition.ABSOLUTE);

confidential.setY(objectFactory.createElementY("275"));

confidential.setZOrder(-1);

// ** Create a new Text element that goes inside the watermark

Text cfText = new Text();

cfText.setContent(objectFactory.createTextContent("Confidential - {DATE}"));

cfText.setFontSize(objectFactory.createTextFontSize("40"));

cfText.getFontStyle().add("Bold");

cfText.getFontStyle().add("Italic");

cfText.setWidth(objectFactory.createElementWidth("500"));

cfText.setHeight(objectFactory.createElementHeight("250"));

cfText.setTransparency(objectFactory.createElementTransparency("0.10"));

// ** And add it to the list of watermark elements.

ArrayOfElement cfElements = new ArrayOfElement();

cfElements.getElement().add(cfText);

confidential.setElements(objectFactory.createContainerElements(cfElements));

// ** And add the watermark to the list of watermarks

watermarks.getWatermark().add(confidential);

return objectFactory.createConversionSettingsWatermarks(watermarks);

}

public static String getFileName(File file) {

String fileName = file.getName();

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return fileName.substring(0, fileName.lastIndexOf('.'));

}

public static String getFileExtension(File file) {

String fileName = file.getName();

return fileName.substring(fileName.lastIndexOf('.') + 1, fileName.length());

}

public static String getPDFDocumentPath(File file) {

String fileName = getFileName(file);

String folder = file.getParent();

if (folder == null) {

folder = new File(file.getAbsolutePath()).getParent();

}

return folder + File.separatorChar + fileName + '.' + OutputFormat.PDF.value();

}

public static byte[] readFile(String filepath) throws IOException {

File file = new File(filepath);

InputStream is = new FileInputStream(file);

long length = file.length();

byte[] bytes = new byte[(int) length];

int offset = 0;

int numRead;

while (offset < bytes.length

&& (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {

offset += numRead;

}

if (offset < bytes.length) {

throw new IOException("Could not completely read file " + file.getName());

}

is.close();

return bytes;

}

public static void writeFile(byte[] fileContent, String filepath) throws IOException {

OutputStream os = new FileOutputStream(filepath);

os.write(fileContent);

os.close();

}

public static boolean isFileExtensionSupported(String extension, DocumentConverterService dcs)

throws DocumentConverterServiceGetConfigurationWebServiceFaultExceptionFaultFaultMessage

{

Configuration configuration = dcs.getConfiguration();

final JAXBElement<ArrayOfConverterConfiguration> converters = configuration

.getConverters();

final ArrayOfConverterConfiguration ofConverterConfiguration = converters.getValue();

final List<ConverterConfiguration> cList = ofConverterConfiguration

.getConverterConfiguration();

for (ConverterConfiguration cc : cList) {

final List<String> supportedExtension = cc.getSupportedFileExtensions()

.getValue().getString();

if (supportedExtension.contains(extension)) {

return true;

}

return false;

}

public static void printException(WebServiceFaultException serviceFaultException) {

System.out.println(serviceFaultException.getExceptionType());

JAXBElement<ArrayOfstring> element = serviceFaultException.getExceptionDetails();

ArrayOfstring value = element.getValue();

for (String msg : value.getString()) {

System.out.println(msg);

}

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