How to add attachment file to Share Point Document Libarary using Graph API - C# code

Question

Hi there,

I am using this code for adding a sample file as an attachment in SharePoint by Graph API programming in C#, but I got this error

 using (FileStream fsSource = new FileStream(FilePath, FileMode.Open, FileAccess.Read))
            {

                var file_Stream = await graphServiceClient.Sites[siteId].Lists[listId].Drive.Root.ItemWithPath(FilePath).Content.Request().PutAsync<DriveItem>(fsSource);
            }

Answer 1

Hi @Maryam Adib

You can use the graph API to upload files to drive items in SharePoint document library, but adding attachment files to list items is not currently supported.

There is a similar feature request on the graph feedback forum, and you can upvote this thread to increase the priority of the request.

Hope this helps.

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