Iformfile file edit mode in MVC C#

Question

0.00/5 (No votes)

See more:

Please help,I am using

IFormFile File

to upload file in MVC C#. Now in Edit mode can i show that file so that user need not to select again on Submit? Otherwise it become empty model in Edit Mode. Also i am storing data in binary format in DB.

What I have tried:

So far I have tried creating

IFormFile File

object return from Controller but while returning in json format it through error.

Posted 29-Sep-22 21:35pm

Mukesh Ghosh

Updated 29-Sep-22 21:45pm

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)

Richard Deeming · Answer 1 · 2022-09-29T21:45:00

No. You cannot pre-populate an <input type="file">, since that would allow random websites to trick users into uploading files from their computer without knowing which file they were uploading.

And even if you could, your site never receives the full path of the file on the user's computer; just the file name and the contents of the file. That wouldn't be enough information to select the same file again.

And even if that wasn't the case, there's no guarantee that the file would still exist in the same path, and wouldn't have changed since it was first uploaded. And there's no guarantee that the edit happens on the same computer that the file was first uploaded from.

The best you can do is to display some sort of indicator that a file already exists, and ignore the file in the POST action if it's null or empty.