Questions on Telerik Document Processing Forum

6 answers

1.4K+ views

Hi All,

For the PDF Processing , I have to attache a single table row and there will be two cells.(some thing which is simillar to the attachment).

1.First cell constitutes of Question.

2.Second Sells constitues of a table.

It his scenario possible?

Regards,

JP

PdfProcessing

answered on 22 Dec 2020

1 answer

214 views

Getting ArgumentOutOfRange exception when opening a workbook hosted on a server

Hello!
Faced an incomprehensible problem.
When trying to open a workbook, an exception is thrown:
ArgumentOutOfRangeException: Index and count must refer to a location within the string. (Parameter 'count')
At the same time, everything works fine on the working computer during development, there is no exception.
The problem pops up when placing a project on a hosting.

The library from Syncfusion in a similar environment opens the file normally on the hosting.

Library version 2020.3.1019
.net5 Server-side project

private void LoadFile()

{

try

{

string path = Path.Combine(Path.GetPathRoot(Environment.SystemDirectory), "Templates", $"temp.xlsx");

using FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read);

XlsxFormatProvider formatProvider = new XlsxFormatProvider();

// Getting exception there while hosted

using Workbook workbook = formatProvider.Import(stream);

}

catch (Exception error)

{

NotificationReference.Show(new NotificationModel()

{

Text = $"{error.GetType().Name}: {error.Message}",

ThemeColor = "primary"

});

}

SpreadProcessing

answered on 21 Dec 2020

3 answers

480 views

Form Field issues

Attached a project to demonstrate some issues we're seeing that need resolving in order to use the component.

1. When using a font like Tahoma on a form field, the value no longer displays or contains garbled text.

2. Input file is 24KB, output is 2MB!

3. Rotated field lose their rotation after being flattened.

4. Simulate merging with other files, 100 times the file is now 150MB! It's as though it's not re-using the fonts, but keeps adding the same ones.

5. when merging, but not flattening, the form fields are all lost on pages after page 1.

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;

using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Streaming;

using Telerik.Windows.Documents.Fixed.Model;

using Telerik.Windows.Documents.Fixed.Model.Annotations;

using Telerik.Windows.Documents.Fixed.Model.Editing;

using Telerik.Windows.Documents.Fixed.Model.InteractiveForms;

using Telerik.Windows.Documents.Fixed.Model.Resources;

namespace FlattenFormFieldsDemo

{

class Program

{

static void Main(string[] args)

{

PdfFormatProvider provider = new PdfFormatProvider();

RadFixedDocument document = provider.Import(File.ReadAllBytes("InteractiveForms.pdf"));

foreach (RadFixedPage page in document.Pages)

{

foreach (Annotation annotation in page.Annotations)

{

if (annotation.Type == AnnotationType.Widget)

{

Widget widget = (Widget) annotation;

if (widget.Field is TextBoxField field)

{

field.Value = "John Doe";

}

FlattenFormFields(document);

string resultFile = "Flattened.pdf";

if(File.Exists(resultFile))

{

File.Delete(resultFile);

}

File.WriteAllBytes(resultFile, provider.Export(document));

MergeMultipleFiles(resultFile);

}

public static void MergeMultipleFiles(string filename)

{

using (PdfStreamWriter fileWriter = new PdfStreamWriter(File.OpenWrite("MergedFlattened.pdf")))

{

// Iterate through the files you would like to merge

for(int i = 0; i< 100; i++)

{

// Open each of the files

using (PdfFileSource fileToMerge = new PdfFileSource(File.OpenRead(filename)))

{

// Iterate through the pages of the current document

foreach (PdfPageSource pageToMerge in fileToMerge.Pages)

{

// Append the current page to the fileWriter, which holds the stream of the result file

fileWriter.WritePage(pageToMerge);

}

public static void FlattenFormFields(RadFixedDocument document)

{

foreach (RadFixedPage page in document.Pages)

{

List<Widget> widgetsToRemove = new List<Widget>();

FixedContentEditor pageEditor = new FixedContentEditor(page);

foreach (Annotation annotation in page.Annotations)

{

if (annotation.Type == AnnotationType.Widget)

{

Widget widget = (Widget)annotation;

FlattenWidgetAppearance(pageEditor, widget);

widgetsToRemove.Add(widget);

}

foreach (Widget widget in widgetsToRemove)

{

page.Annotations.Remove(widget);

}

foreach (FormField field in document.AcroForm.FormFields.ToArray())

{

document.AcroForm.FormFields.Remove(field);

}

private static void FlattenWidgetAppearance(FixedContentEditor pageEditor, Widget widget)

{

FormSource widgetAppearance = GetWidgetNormalAppearance(widget);

if (widgetAppearance == null) return;

pageEditor.Position.Translate(widget.Rect.Left, widget.Rect.Top);

pageEditor.DrawForm(widgetAppearance, widget.Rect.Width, widget.Rect.Height);

}

private static FormSource GetWidgetNormalAppearance(Widget widget)

{

FormSource widgetAppearance;

switch (widget.WidgetContentType)

{

case WidgetContentType.PushButtonContent:

widgetAppearance = ((PushButtonWidget)widget).Content.NormalContentSource;

break;

case WidgetContentType.SignatureContent:

widgetAppearance = ((SignatureWidget)widget).Content.NormalContentSource;

break;

case WidgetContentType.VariableContent:

widgetAppearance = ((VariableContentWidget)widget).Content.NormalContentSource;

break;

case WidgetContentType.TwoStatesContent:

TwoStatesButtonWidget twoStatesWidget = (TwoStatesButtonWidget)widget;

widgetAppearance = GetTwoStatesWidgetNormalAppearance(twoStatesWidget);

break;

default:

throw new NotSupportedException(string.Format("Not supported widget content type {0}", widget.WidgetContentType));

}

return widgetAppearance;

}

private static FormSource GetTwoStatesWidgetNormalAppearance(TwoStatesButtonWidget twoStatesWidget)

{

FormField field = twoStatesWidget.Field;

bool isOnState;

switch (field.FieldType)

{

case FormFieldType.CheckBox:

CheckBoxField checkBox = (CheckBoxField) field;

isOnState = checkBox.IsChecked;

break;

case FormFieldType.RadioButton:

RadioButtonField radio = (RadioButtonField) field;

RadioButtonWidget radioWidget = (RadioButtonWidget) twoStatesWidget;

if (radio.ShouldUpdateRadiosInUnison)

{

isOnState = radio.Value != null && radio.Value.Value.Equals(radioWidget.Option.Value);

}

else

{

isOnState = radio.Value == radioWidget.Option;

}

break;

default:

throw new NotSupportedException(string.Format("Not supported field type {0} for TwoStateButtonWidget", field.FieldType));

}

FormSource widgetAppearance = (isOnState ? twoStatesWidget.OnStateContent : twoStatesWidget.OffStateContent).NormalContentSource;

return widgetAppearance;

}

PdfProcessing

answered on 21 Dec 2020

4 answers

639 views

Flattening PDF files using PdfStreamWriter

Good day all.

I am developing an application using C# WinForms and Telerik 2020.1.218.40 that needs to take pre-filled PDF forms and display the page images as static documents. I have been able to read the PDFs and split the documents into individual pages, which when viewed using Microsoft Edge's PDF rendering, displays the forms with data, but when loaded into a RadPdfViewer, only displays the form image without any of the completed data.

Any help in displaying the form data is appreciated.

private static readonly string uploadPath = "H:\\TEMP\\DMSUpload\\";

string splitNameTemplate = Path.Combine(uploadPath, "SplitPage-{0}.pdf");

using (FileStream fs = new FileStream(uploadPath + "TEMP.PDF", FileMode.OpenOrCreate))
{
   RadFixedDocument document = new PdfFormatProvider().Import(fs);
   using (FileStream writeStream = new FileStream(uploadPath + "FOO.PDF", FileMode.OpenOrCreate))
   {
PdfFormatProvider provider = new PdfFormatProvider();
provider.Export(document, writeStream);
using (PdfFileSource fileSource = new PdfFileSource(writeStream))
{
   for (int i = 0; i < fileSource.Pages.Length; i++)
   {
   using (PdfStreamWriter fileWriter = new PdfStreamWriter(File.OpenWrite(string.Format(splitNameTemplate, i + 1))))
   {
PdfPageSource pageSource = fileSource.Pages[i];
fileWriter.WritePage(pageSource);
   }
   }
   }
}
}
pdfViewer.LoadDocument(uploadPath + "SplitPage-1.pdf");

PdfProcessing

answered on 21 Dec 2020

6 answers

358 views

EncodedImageData example for 32 bit argb image

In your example, located at https://github.com/telerik/xaml-sdk/blob/master/PdfProcessing/CreateDocumentWithImages/MainViewModel.cs , you go through how to encode a dual tone image. I have tried to apply this same logic to an 32 bit ARGB image, one directly from RadChartView.ExportToImage, but the image comes out in gray scale and not even in the correct dimensions. I am not sure what I am missing, I've even changed the color space from DeviceGray to DeviceRGB with no luck and set bits per component to 8. I am calculating stride and data correct array size correctly...

Thanks.

PdfProcessing

answered on 21 Dec 2020

1 answer

250 views

Encoding when importing with CsvFormatProvider

Hi

In the documentation for CsvFormatProvider (https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/formats-and-conversion/csv/settings) it is decribed that you can use Settings.Encoding to set the encoding when exporting.

How does it work when importing a file? Does CsvFormatProvider automatically detect the encoding of the provided file? Or do I need to ensure that files that I import always have a certain encoding?

Thanks!

SpreadProcessing

answered on 18 Dec 2020

2 answers

482 views

Watermark

In the process of evaluating the PDF functionality provided by Telerik so we can switch components (hopefully).

Is there a way to add a watermark to an existing PDF using another PDF as that watermark?

Thanks.

PdfProcessing

answered on 17 Dec 2020

4 answers

1.3K+ views

HTML to PDF, No CSS and Unable to make landscape

Hi,

I am looking at the WordsProcessing to use in a project to convert HTML to PDF, however I have two issues. One the CSS from the linked files are not being applied so the first and easy question is must this be inline styles \ css in the cshtml file

The second is how do I get the output to show as landscape. My code below shows you how I am currently doing it and it is pushing out the HTML table and data but no styles from bootstrap (mentioned above) but its also very squashed so I need it to be in a landscape format.

public byte[] ConvertDocumentToPDF(byte[] fileData, string extension, ImageQuality exportQuality)

{

byte[] convertedData = null;

RadFlowDocument document;

IFormatProvider<RadFlowDocument> provider = this.providers

.FirstOrDefault(p => p.SupportedExtensions

.Any(e => string.Compare(extension, e, StringComparison.InvariantCultureIgnoreCase) == 0));

if (provider == null)

{

Log.Error($"No provider found that supports the extension: {extension}");

return null;

}

try

{

using (Stream stream = new MemoryStream(fileData))

{

try

{

document = provider.Import(stream);

}

catch (Exception ex)

{

Log.Error(ex.ToString());

return null;

}

var quality = Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Export.ImageQuality.Medium;

switch (exportQuality)

{

case ImageQuality.High:

quality = Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Export.ImageQuality.High;

break;

case ImageQuality.Medium:

quality = Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Export.ImageQuality.Medium;

break;

case ImageQuality.Low:

quality = Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Export.ImageQuality.Low;

break;

}

PdfFormatProvider formatProvider = new PdfFormatProvider();

formatProvider.ExportSettings.ImageQuality = quality;

using (var stream = new MemoryStream())

{

formatProvider.Export(document, stream);

convertedData = stream.ToArray();

}

catch (Exception ex)

{

Log.Error(ex.ToString());

}

return convertedData;

}

Any and all help gratefully received.

Thanks

WordsProcessing

answered on 15 Dec 2020

8 answers

433 views

What objects to use for bringing RTF, PDF, etc. files into document flow

Hi all,

My company has historically used an ActiveX control to produce certain documents, created as PDFs, for printing or sending via email. With the move to a new development environment we lost support for ActiveX and need to switch to the Telerik document controls.

We wrote a program using the following Telerik objects:

Telerik.Windows.Documents.Fixed.Model.RadFixedDocument.

Telerik.Windows.Documents.Fixed.Model.RadFixedPage.

Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.

This works fine for most of the document creation, but we have a need to add language specific to each of our customers to the document. This language comes from each customer in an RTF file. The old control had a method to add the RTF file to the document flow, and it used the RTF metadata to add the properly formatted text to the document. Can you tell me if the Telerik document model has the ability to do this? And what objects/methods would be best to use? If it doesn't support RTF specifically, but has this ability for other formats, I can convert the RTF file to PDF, DOCX, etc. Thanks.

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