How to download the azure storage file(first page only)-VB.NET

Question

0.00/5 (No votes)

See more:

hi,
I want to download the azure storage pdf/tif file in local.
In pdf having many pages. I need to download only the first page.
I no need other pages.

What I have tried:

Dim size = CloudFile.Properties.Length
Dim buffer(size) As [Byte]
Dim Retval = cCloudFile.DownloadToByteArray(buffer, 0)
Dim fileName ="newfile.pdf"
File.WriteAllBytes(fileName, buffer)

but its download all the pages. I need to download first page only.

Posted 12-Jul-21 0:21am

shiva_yn

Updated 12-Jul-21 0:43am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Chris Copeland · Answer 1 · 2021-07-12T00:43:00

While I've not used it, just checking the documentation for CloudFile indicates to me that it is agnostic of the type of file it's downloading: it doesn't know whether the file is a text document, PDF, image, or spreadsheet. All it knows is that there's a file being stored containing data.

If you want to extract pages then you probably need to use a PDF library to interact with the file once all of the content has been downloaded. That does mean continuing to download the whole file, then pass the contents into a PDF parser library in order to extract the first page.

A quick Google seemed to show iTextSharp[^] is a popular library for doing this, though the NuGet page seems to indicate that it's now at EOL and iText 7 should be used instead.