How to add attachment to page

[fredggy]

Hi, I am trying to add an image to an existing confluence page.
Can you share some code exemple to do so?
I'm looking into this functions but I am not sure what is the way to go.
thanks

`
// what should the content string be?
private async Task CreateAttachment(string title, string content, long parentId)
{
return await _client.Content.CreateAsync(ContentTypes.Attachment, title, SpaceId, content, parentId);
}

    // how to create a picture Content instance?
    private async Task AttachImageToPage(long toPageId, Content image, string filename)
    {
        var result = await _client.Attachment.AttachAsync(toPageId, image, filename);
        return result.FirstOrDefault();
    }

`

[Lakritzator]

Ok, I'll make something. Hang-in there, I don't always have time to work on this.

[fredggy]

I found this code on stack overflow using rest api that works but it would be nice to have a simple wrapper that offer more parameters maybe.

    private string SimpleRestApiUpload(long pageId, string filePath)
    {
        using (var client = new WebClient())
        {
            string url = string.Format("{0}/rest/api/content/{1}/child/attachment", DomaineUrl, pageId);
            string authString = $"{UserName}:{Password}";
            string encodedValue = Convert.ToBase64String(Encoding.ASCII.GetBytes(authString));
            client.Headers.Add("Authorization", "Basic " + encodedValue);
            client.Headers.Add("X-Atlassian-Token", "nocheck");
            byte[] result = client.UploadFile(url, filePath);
            return Encoding.Default.GetString(result);
        }
    }

[fredggy]

but attachment update doesn't work with that code.

[Lakritzator]

My underlying framework does most of the work for you!
If you have a file on the file system, you can do the following:

using Stream stream = File.OpenRead(@"path to your file");
var attachments = await _client.Attachment.AttachAsync(_toPageId, stream, "myfilename", "Just attached a bitmap");

That's all... (c# 9 syntax, if you can't use that you just need to do a using block around your stream)

Btw.
In the case you have a System.Drawing.Bitmap in your code you can do the following:

Somewhere when your application starts, you'd want to make sure that the underlying HttpExtensions works with Bitmaps, you need to call the following ONCE:

BitmapHttpContentConverter.RegisterGlobally();
(assumes using Dapplo.HttpExtensions.WinForms.ContentConverter;)
Then you can just attach it directly via:

var attachments = await _client.Attachment.AttachAsync(toPageId, bitmap, "image.png", "Just attached a bitmap");
where bitmap is the variable with the bitmap.

By default the image is stored as a PNG, you can configure this, but I think the first option if what you need.

[fredggy]

thanks a lot!

[Lakritzator]

@fredggy Does this mean that works for you?