REST API: How to create or update attachment in a list item?

Question

I need to attach a file to a list item in Sharepoint 2013.
If an attachment with the same name already exists, I need to overwrite its content with the new one.

I'm currently using request like this:

.../AttachmentFiles/add(FileName='MyFile.csv')

It works if no attachment with the same name exist in the item.
But it fails if attachment already exists.
Is there a way to instruct SP to overwrite the attachment when it's already exists?

Community · Accepted Answer · 2017-04-13 12:41:19Z

2

Apparently, overwrite is not possible with REST but you can delete and re-attach it.
See this Stack Exchange post.

edited Apr 13, 2017 at 12:41

CommunityBot

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answered Mar 22, 2017 at 23:17

Tracy

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user234562 · Accepted Answer · 2017-03-22 15:23:06Z

-1

Not sure about this, but give it a try :D

.../AttachmentFiles/add(overwrite=true, FileName='MyFile.csv')

answered Mar 22, 2017 at 15:23

user234562

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1 Comment

Vlad K Over a year ago

I've tired this, it doesn't work with attachments unfortunately.

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