Questions on Telerik Document Processing Forum

1 answer

133 views

Import xlsx with chart from template

Hello!
I'm create xlsx from template, which contains some chart

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

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

XlsxFormatProvider formatProvider = new XlsxFormatProvider();

using Workbook workbook = formatProvider.Import(stream);

But workbook doesn't contains any chart objects after importing from stream.
Why?

SpreadProcessing

answered on 26 Oct 2020

3 answers

150 views

RadContentEditor.AddImage() makes page blank sometimes

Hello,

I'm trying few options to draw images to RadFixedDocument, by using FixedContentEditor.DrawImage(), RadFixedPage.Content.AddImage(), by stream, and by image source, in some documents generated PDF is blank, after image added... page has 716x956, position is 333x547, image to be drawed has 150x40px, page margin 50 from all sides.

PdfProcessing

answered on 12 Oct 2020

4 answers

635 views

Error on import

I am loading document from array.

In my local solution it work´s fine, but when i deploy the website to the server it doesnot work. the error is:

The type initializer for 'Telerik.Windows.Documents.Flow.Model.RadFlowDocument' threw an exception.

StackTrace:
at Telerik.Windows.Documents.Flow.Model.RadFlowDocument..ctor(Boolean setInitialDocumentDefaultValues)
at Telerik.Windows.Documents.Flow.FormatProviders.Docx.Import.RadFlowDocumentImportContext.BeginImport()
at Telerik.Windows.Documents.FormatProviders.OpenXml.OpenXmlImporter`1.Import(Stream input, IOpenXmlImportContext context)
at Telerik.Windows.Documents.Flow.FormatProviders.Docx.DocxFormatProvider.ImportOverride(Stream input)
at Telerik.Windows.Documents.Common.FormatProviders.BinaryFormatProviderBase`1.Import(Byte[] input)
at FlujoTrabajo_VentanaFirma.GeneraOficioParaFirma(Byte[]& DocumentoPDF, Int32 idArchivo, Int32& NumOficio, String CodigoValidacion, Int32& IdFormulario, String Firmante, String PieFirma, DbTransaction transaction) in c:\Users\pmunoz\AppData\Local\Temp\WebSitePublish\Web_SIGEDOC--1718161755\obj\Debug\AspnetCompileMerge\Source\FlujoTrabajo\VentanaFirma.aspx.cs:line 1138

WordsProcessing

answered on 06 Oct 2020

1 answer

260 views

How create customer layout of pdfprocessing document page

Hi,

Please help me to create layout of pdf document page have a lot of table and have layout same as picture in attachment file.

Many thanks

PdfProcessing

answered on 30 Sep 2020

3 answers

465 views

CreateThumbnail in Background

Good day,

how is it possible to create the pdf thumbnail images in background without blocking the whole application?

I am generating a list of thumbnails of the 1st page of many PDFS, which results in the application UI beeing blocked.

This is what I am doing:

public ImageSource ConvertPdfToImageThumbnail(string filePath)

{

var tf = new ThumbnailFactory();

using Stream stream = File.Open(filePath, FileMode.Open);

var formatProvider = new PdfFormatProvider();

RadFixedDocument document = formatProvider.Import(stream);

if (document.Pages.Count > 0)

{

ImageSource result = tf.CreateThumbnail(document.Pages[0], document.Pages[0].Size);

return result;

}

return null;

}

The function is not doing anything on the UI, just loading a PDF and creating the ImageSource.

When called from a different Thread, the line

"ImageSource result = tf.CreateThumbnail(document.Pages[0], document.Pages[0].Size);"

is throwing this error: "the calling thread must be STA ..."

How can this task be done without blocking the UI?

Thank you for your support!

PdfProcessing

answered on 30 Sep 2020

6 answers

247 views

Encypting multiple entries gives a corrupt zip file

When creating a password-protected ZIP archive, if I create a new entry and write to it, and during this process create, write and close a second entry, then the first entry appears to be corrupt when you try to read the file.

For example, the following see the following program:

static void Main(string[] args)

{

// Create the main ZIP file

using (var zipStream = File.Create(@"c:\temp\test.zip"))

{

var encrypt = new DefaultEncryptionSettings { Password = "nick" };

using (var zipArchive = new ZipArchive(zipStream, ZipArchiveMode.Create,true,null,null,encrypt))

{

// Create the 1st entry.

using (var entry1 = zipArchive.CreateEntry("text1.txt"))

{

using (var stream1 = entry1.Open())

{

using (var writer1 = new StreamWriter(stream1))

{

writer1.WriteLine("Writer 1 line 1");

// While writing the 1st entry, create a second entry

using (var entry2 = zipArchive.CreateEntry("text2.txt"))

{

using (var stream2 = entry2.Open())

{

using (var writer2 = new StreamWriter(stream2))

{

writer2.WriteLine("Writer 2 line 1");

}

// Continue writing the 1st entry.

writer1.WriteLine("Writer 1 line 2");

}

This runs without error. Opening the file using 7-zip, I can read the "text2.txt" entry with no problem with the correct password. However, opening the "text1.txt" file gives an error suggesting the password is wrong.

Program in .NET 4.6, using Telerik.Windows.Zip 2018.3.1010.40.

ZipLibrary

answered on 29 Sep 2020

2 answers

181 views

How to configure/assemblies needed for .Net Core?

I have a large project coming up that will be a combination of ASP.net core and .Net core console applications to generate various types of documents for customer consumption. I am trying to take this time now to learn how to use the Telerik document libraries. This page seems to imply that there are specific libraries for .net core https://docs.telerik.com/devtools/document-processing/getting-started/first-steps.

Using nuget, I added Telerik.Documents.Core, Fixed, Flow, Flow.FormatProvideders.PDF to the project.. But when referencing the libraries in the Program.cs using section, it will only autofill Telerik.Documents.Core and Telerik.Zip. Visual Studio 19 does not recognize.Fixed or .Flow libraries.

If I change to the telerick.windows versions of the libraries, VS does add all the libraries without a problem to the application. it compiles but when executing, it throws an error as missing libraries.

What am I missing? Should we only create standard .net console apps & only use the .net core libraries when integrating with asp.net core applications?

General Discussions