How to use compression while saving pdf file using PDFView4Net component - wpf

I need to compress the pdf file while saving, through PDFView4Net component using WPF.

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Rich Text Editor with file upload in SPFX/React WebPart

I am looking for some package with Rich Text Editor which has file upload for files (not images) and user can basically upload to Rich Text Editor files and description.
I tried to find something similar, but I was unsuccesful.
Do you have any suggestions ?

add column to Uploaded xlsx file and export(download) on client side in ExcelJS

how to add a new column (at the end) and data (e.g. text and image) to an already uploaded xlsx file and export (download) a new, updated file on the client side. a React app) in ExcelJS. any reference or source code?
I am importing an xlsx file with images and text data and successfully reading image and text data, but I also want to add a new column at the end, add data to the new column, and export (download) the entire new, updated xlsx file to the client side.
Exceljs Docs doesn't cover the file export part.
any solution?
thanks

How to reduce loading time for displaying preview of pdf file in react-pdf

I want to show pdf file preview as an image in React.js using react-pdf library.
I am getting pdf file from online URL and it shows the preview image correctly now. But the loading time seems to be too long and I want to reduce it.
I think the library load the whole pdf file with all pages. Is they any way I can load only one page for preview image so, I can reduce the loading time?

How can I view a PDF using React?

How can I display the following binary array using React?
These are purely PDF files.
This could be successfully uploaded to an MSQL database.
On retrieval I get the shown string.
The file was not compressed ect.
"JVBERi0xLjcNCiW1tbW1DQoxIDAgb2JqDQo8PC9UeXBlL0NhdGFsb2cvUGFnZXMgMiAwIFIvTGFuZyhkZS1ERSkgL1N0cnVjdFRyZWVSb290IDEwIDAgUi9NYXJrSW5mbzw8L01hcmtlZCB0cnVlPj4vTWV0YWRhdGEgMjIgMCBSL1ZpZXdlclByZWZlcmVuY2VzIDIzIDAgUj4+DQplbmRvYmoNCjIgMCBvYmoNCjw8L1R5cGUvUGFnZXMvQ291bnQgMS9LaWRzWyAzIDAgUl0gPj4NCmVuZG9iag0KMyAwIG9iag0KPDwvVHlwZS9QYWdlL1BhcmVudCAyIDAgUi9SZXNvdXJjZXM8PC9Gb250PDwvRjEgNSAwIFI+Pi9FeHRHU3RhdGU8PC9HUzcgNyAwIFIvR1M4IDggMCBSPj4vUHJvY1NldFsvUERGL1RleHQvSW1hZ2VCL0ltYWdlQy9JbWFnZUldID4+L01lZ...."

Is it possible to convert .pdf file to image in ionic with AngularJS?

I am very new to ionic. So I want to convert my pdf file to an image file in using Angularjs.

Once you have rendered the PDF in your appliaction using PDF.JS, converting a PDF page to an image is nothing special. PDF.JS uses a element to render a PDF (although it can also be set to use an SVG). You can easily convert the underlying canvas to an image using canvas.toDataURL method.
We can use canvaz to pdf convertion for this purpose
For more information :
http://usefulangle.com/post/24/pdf-to-jpeg-png-with-pdfjs

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