Posting Documents to OneNote via new REST API - windows-store-apps

Question

For some reason, any document I upload to OneNote via the new REST API is corrupt when viewed from OneNote. Everything else is fine, but the file (for example a Word document) isn't clickable and if you try and open is shows as corrupt.
This is similar to what may happen when there is a problem with the byte array, or its in memory, but that doesn't seem to be the case. I use essentially the same process to upload the file bytes to SharePoint, OneDrive, etc. It's only to OneNote that the file seems to be corrupt.
Here is a simplified version of the C#
HttpRequestMessage createMessage = null;
HttpResponseMessage response = null;
using (var streamContent = new ByteArrayContent(fileBytes))
{
streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
streamContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");
streamContent.Headers.ContentDisposition.Name = fileName;
createMessage = new HttpRequestMessage(HttpMethod.Post, authorizationUrl)
{
Content = new MultipartFormDataContent
{
{
new StringContent(simpleHtml,
System.Text.Encoding.UTF8, "text/html"), "Presentation"
},
{streamContent}
}
};
response = await client.SendAsync(createMessage);
var stream = await response.Content.ReadAsStreamAsync();
successful = response.IsSuccessStatusCode;
}
Does anyone have any thoughts or working code uploading an actual binary document via the OneNote API via a Windows Store app?

Answer 1

The WinStore code sample contains a working example (method: CreatePageWithAttachedFile) of how to upload an attachment.
The slight differences I can think of between the above code snippet and the code sample are that the code sample uploads a pdf file (instead of a document) and the sample uses StreamContent (while the above code snippet uses ByteArrayContent).
I downloaded the code sample and locally modified it to use a document file and ByteArrayContent. I was able to upload the attachment and view it successfully. Used the following to get a byte array from a given stream:
using (BinaryReader br = new BinaryReader(stream))
{
byte[] b = br.ReadBytes(Convert.ToInt32(s.Length));
}
The rest of the code looks pretty similar to the above snippet and overall worked successfully for me.
Here are a few more things to consider while troubleshooting the issue:
Verify the attachment file itself isn't corrupt in the first place. for e.g. can it be opened without the OneNote API being in the mix?
Verify the API returned a 201 Http Status code back and the resulting page contains the attachment icon and allows downloading/viewing the attached file.

Answer 2

So, the issue was (strangely) the addition of the meta Content Type in the tag sent over in the HTML content that's not shown. The documentation refers to adding a type=[mime type] in the object tag, and since the WinStore example didn't do this (it only adds the mime type to the MediaTypeHeaderValue I removed it and it worked perfectly.
Just changing it to this worked:
<object data-attachment=\"" + fileName + "\" data=\"name:" + attachmentPartName + "\" />
Thanks for pointing me in the right direction with the sample code!