CODEWITHSUNDEEP
c#microsoft-graph-apiattachment
user8608110
user8608110

Reputation: 211

Microsoft Graph - Saving file attachments through C#?

Is it possible to save file attachments in C# through Microsoft Graph API?

I know I can get the properties of the attachment (https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/attachment_get) - can we also save it to a certain location?

Upvotes: 3

Views: 6309

Answers (2)

Tomas Paul
Tomas Paul

Reputation: 540

Once you have particular Microsoft Graph message, you can e.g. pass it to a method as parameter. Then you need to make another request to get attachments by message Id, iterate through attachments and cast it to FileAttachment to get access to the ContentBytes property and finally save this byte array to the file.

private static async Task SaveAttachments(Message message)
{
    var attachments = 
        await _client.Me.MailFolders.Inbox.Messages[message.Id].Attachments.Request().GetAsync();

    foreach (var attachment in attachments.CurrentPage)
    {
        if (attachment.GetType() == typeof(FileAttachment))
        {
            var item = (FileAttachment)attachment; // Cast from Attachment
            var folder = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
            var filePath = Path.Combine(folder, item.Name);
            System.IO.File.WriteAllBytes(filePath, item.ContentBytes);
        }
    }
}

Upvotes: 11

RasmusW
RasmusW

Reputation: 3461

When you get the attachment properties, they will contain information about the attachment.

There are three types of attachments.

First, check the attachment type in the properties' @odata.type and handle them correspondingly.

For fileAttachment types, they contain a contentLocation attribute, which is the URI of the attachment contents.

You can download the attachment from the URI.

Upvotes: 2

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