EXCEPTION on using byte[] type while posting from view to controller

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In my MVC project, I am using viewModel that has property of type byte[]. I am using byte[] to hold image file so that this file can be passed to model. My view is strongly typed view.
The problem is whenever I click on submit button to send control to controller, I am getting exception "

The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.

.

How can I handle this exception.
Thanks in advance.

What I have tried:

Tried converting byte[] type to null in setter but stackoverflow happened.

Posted 22-Feb-19 0:09am

Codes DeCodes

Updated 22-Feb-19 0:54am

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Richard MacCutchan 22-Feb-19 6:39am

Look at the error message and find out why your data is incorrect.

F-ES Sitecore 22-Feb-19 6:59am

Post the relevant bits of code and view.

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OriginalGriff · Answer 1 · 2019-02-22T00:55:00

Byte arrays and Base64 are not the same thing: Base 64 is a "stringified" representation of binary data, which uses a limited set of 64 printable characters (hence the name) to represent the same data in a way that can easily be transferred over text-based links such as HTML.
Byte arrays contain the binary data directly, and that means full eight bit data in an array.

If your method expects Base64 data, you cannot hand it binary image data and expect it to work, any more than I can hand you a copy "War and Peace" in the original Russian and expect you to read it!

If may be that you can use Convert.ToBase64String Method (System) | Microsoft Docs[^] to convert it, but since I have no access to your data, I can't tell from here if that will work - it will depend on the content of the byte array.