How to save images from webbrowser without re-download ? [or override "save picture as ..." option] in C#

Question

1.00/5 (2 votes)

See more:

Hi,

How can Save a Captcha Image from loaded web Browser Component
c# in windows application, witout re-download it.
Like as I Right Click on Image and press "Save picture as ...".

What I have tried:

if I try to download this captcha, server returns diffrent Image !

Posted 12-Aug-18 6:37am

Amir Hosein Nasr

Updated 12-Aug-18 15:01pm

Add a Solution

Comments

Richard MacCutchan 12-Aug-18 12:45pm

The whole point about a captcha is that it is dynamically generated by the server. This is to stop hackers capturing the image and trying to use it in their spam messages.

Amir Hosein Nasr 13-Aug-18 5:43am

but I can right click on image and save it. not any way to save it ?

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)

Dave Kreskowiak · Accepted Answer · 2018-08-12T15:02:00

Solution 1

You can't. The image is sent with a tag that tells the browser not to cache the image file. Once the browser renders the image, it forgets the image file even exists.

Posted 12-Aug-18 15:02pm

Dave Kreskowiak

Comments

Amir Hosein Nasr 13-Aug-18 0:38am

but why I can right click on image and save it.

Dave Kreskowiak 13-Aug-18 8:20am

The image is still in memory (it does have to be rendered whenever called upon). There's just no cached file for it.