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What is the correct encoding to read and write PostScript files

I would like to parse a PostScript file, find appropriate line number and insert a PostScript command. So, I need to read the whole file and write it as a new file along with the new commands I want to insert.
I'm using StreamReader and StreamWriter for this process.
StreamReader sr = new StreamReader("filename.ps", System.Text.Encoding.UTF8, true);
StreamWriter sw = new StreamWriter("updatedfilename.ps",true, System.Text.Encoding.UTF8);
When doing this, even though the commands are inserted in the appropriate location, some characters are getting lost due to encoding issues.
For example, please check the below image: In the After content, you can notice the yellow highlighted characters which got added during my write process.
In summary, I would like to know the process to read and write a PS file as it is without losing data because of encoding.

Convert xsl - fo to pdf

I have an XSL-FO file and data is available in xml/json formats. I wanted to create a pdf using this xsl structure.
Can anyone suggest any open source libraries for conversion? I want it to be done at the C# level.
Note: I tried converting to html but as it is xsl-fo file I can't get the alignment.

You can use Apache FOP (https://xmlgraphics.apache.org/fop/) tool. It can generate PDF document from XSL-FO input.
From the C# it is possible to start Apache FOP process pointing it to the XSL-FO file (or use stdin, so you don't have to use any temporary files). After process exists you get PDF file (in file on disk or stdout).
For start you can make Apache FOP read XSL-FO file and write PDF file to disk, for that use Process class (https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.process?view=netframework-4.8):
Draft code snippet (may contains errors but it should be a good start for you):
Process.Start("C:\\path\\to\\fop input_xsl-fo.xml output.pdf").WaitForExit();

I tried using fo.net and it worked for me,
here is the sample code
string lBaseDir = System.IO.Path.GetDirectoryName("e:\thermalpdf.xsl");
XslCompiledTransform lXslt = new XslCompiledTransform();
lXslt.Load("e:\thermalpdf.xsl");
lXslt.Transform("e:\billingData1.xml", "books1.fo");
FileStream lFileInputStreamFo = new FileStream("books1.fo", FileMode.Open);
FileStream lFileOutputStreamPDF = new FileStream("e:\response2.pdf", FileMode.Create);
FonetDriver lDriver = FonetDriver.Make();
lDriver.BaseDirectory = new DirectoryInfo(lBaseDir);
lDriver.CloseOnExit = true;
lDriver.Render(lFileInputStreamFo, lFileOutputStreamPDF);
lFileInputStreamFo.Close();
lFileOutputStreamPDF.Close();

File.ReadAllText does not return full content in C#

In my c# program, I have an image which is successfully stored in a byte[] data called bytes. I successfully write it into a .txt file using the following code
using (FileStream file = new FileStream("text.txt", FileMode.Create, FileAccess.Write))
{
file.Write(bytes, 0, numToWrite);
file.Close();
}
The above code stores the exact content I wish to store.
Whenever I wish to read the content of the file, text.txt, into textbox I only get the first line or little part of the first line. But when I open the file, text.txt, I see the complete content.
This is the code I use to read the file
string kk = File.ReadAllText("text.txt");

You have said at the start of the question that you have a byte[] that you are writing into the file. It's not clear why you decided not to use File.WriteAllBytes but let's assume that your code is correctly writing all the data into the file called "text.txt", which has been explained in comments does not magically make this a text file.
Using File.ReadAllText is not going to work because The data in the file is binary data, not text. As you can see from the remarks on the documentation, it will try to decide the encoding of the text file (which won't work because it contains binary data) and will do end of line processing which you won't want for a binary file.
The best way to read the data back is to use File.ReadAllBytes, which gives you back a byte[], just like you started with.

How to convert docx to html file using open xml with formatting

I know there are lot of question having same title but I am currently having some issue for them I didn't get the correct way to go.
I am using Open xml sdk 2.5 along with Power tool to convert .docx file to .html file which uses HtmlConverter class for conversion.
I am successfully able to convert the docx file into the Html file but the problem is, html file doesn't retain the original formatting of the document file. eg. Font-size,color,underline,bold etc doesn't reflect into the html file.
Here is my existing code:
public void ConvertDocxToHtml(string fileName)
{
byte[] byteArray = File.ReadAllBytes(fileName);
using (MemoryStream memoryStream = new MemoryStream())
{
memoryStream.Write(byteArray, 0, byteArray.Length);
using (WordprocessingDocument doc = WordprocessingDocument.Open(memoryStream, true))
{
HtmlConverterSettings settings = new HtmlConverterSettings()
{
PageTitle = "My Page Title"
};
XElement html = HtmlConverter.ConvertToHtml(doc, settings);
File.WriteAllText(#"E:\Test.html", html.ToStringNewLineOnAttributes());
}
}
}
So I just want to know if is there any way by which I can retain the formatting in converted HTML file.
I know about some third party APIs which does the same thing. But I would prefer if there any way using open xml or any other open source to do this.

PowerTools for Open XML just released a new HtmlConverter module. It now contains an open source, free implementation of a conversion from DOCX to HTML formatted with CSS. The module HtmlConverter.cs supports all paragraph, character, and table styles, fonts and text formatting, numbered and bulleted lists, images, and more. See https://openxmldeveloper.org/

Your end result will not look exactly the way your Word Document turns out, but this link might help.

You might want to find an external tool to help you do this, like Aspose Words

You can use OpenXML Viewer extension for Firefox for Converting with formatting.
http://openxmlviewer.codeplex.com
This works for me. Hope this helps.

Creating report with Aspose.Word without losing formatting

I am using Aspose.Words to create reports from a template file (.docx filetype).
After using Aspose.Words to modify the template file and saving it into a new file, the formatting of the template file were lost (such as bold text, comments, etc).
I have tried:
Aspose.Words.Document doc = new Document(inputStream);
var outputStream = new MemoryStream();
doc.Save(outputStream, SaveFormat.docx);
What I did not expect is that outputStream is much less bytes than inputStream although I have yet to make any modification on doc. It may the reason why the report file lose their formatting.
What should I try now?

Ok, the problem is because the current version of Aspose.Words I'm using does not support docx filetype. But it still can read text of a .docx file, and only text(without any associated formatting).