Graph Email Attachment does not have Content or ContentBytes attributes

Question

Graph Email Attachment does not have Content or ContentBytes attributes

Ashley Fonseca 21

I am using latest version of Graph and related nuget pakages. I have seen examples on how to download attachment but I cannot find Content or ContentByte attribute Attachment class. How can I get attachment. Below is my code

var attachment = await graphClient.Users[users[0].Id].Messages[messages[0].Id].Attachments[aId.Id]
.Request()
.GetAsync();

Please see attach screenshot.

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Answer 1

Srinivasa Rao Darna 6,761 Microsoft External Staff

Hi @Anonymous ,

To get mail attachment you can change your code as follows.

var stream = await graphClient.Users["{userId}"].Messages["{messageId}"].Attachments["{attachmentId}"].Content  
	.Request()  
	.GetAsync();

Hope this helps.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have further questions about this answer, please click "Comment".

Ashley Fonseca 21 Reputation points

2022-06-22T23:38:36.823+00:00

Thanks for your response.
Unfortuntely it says IAttachmentRequestBuilder does not contain a definition for Content.
Am I using wrong sdk or something?

Srinivasa Rao Darna 6,761 Microsoft External Staff

@Anonymous , It appears Content is missed SDK build though the documentation suggests using Content.

Here are workarounds available.

var attachmentRequestBuilder = client.Me.Messages[msgId].Attachments[attId];  
var fileRequestBuilder = new FileAttachmentRequestBuilder(attachmentRequestBuilder.RequestUrl, client);  
  
Console.WriteLine($"Request URL: {fileRequestBuilder.Content.Request().RequestUrl}");  
var stream = await fileRequestBuilder.Content.Request().GetAsync();

or

var requestUrl = GraphServiceClient.Users[CurrentUser.Id].Messages[CurrentMessage.Id]  
   .Attachments[id].AppendSegmentToRequestUrl("$value");  
var hrm = new HttpRequestMessage(HttpMethod.Get, requestUrl);  

await client.AuthenticationProvider.AuthenticateRequestAsync(hrm);  
var response = await client.HttpProvider.SendAsync(hrm);  

var content = await response.Content.ReadAsStringAsync();

https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/563#issuecomment-608571810
https://stackoverflow.com/questions/66711817/microsoft-graph-rest-api-how-to-get-mime-content-from-an-itemattachment-in-c-sh
https://stackoverflow.com/questions/60992118/how-to-use-value-using-microsoft-graph-library-in-c-sharp

Hope this helps.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have further questions about this answer, please click "Comment".

Answer 2

Paul Klinger 15

Hi, I recently had the same problem.

Here is a solution that worked for me and is supported by the v5 of the MS Graph SDK.

//Get Attachment
var stream = await graphClient.Users["{userID}"].Messages["{msgId}"].Attachments["{attachmentId}"]
.GetAsync();

//cast stream to FileAttachment 
var fileAttachment = stream as FileAttachment; 

//Now you could do something like save the file
File.WriteAllBytes(filePath, fileAttachment.ContentBytes);

Answer 3

Elias Glor 6

For anyone else having this problem:

Attachment is a generic type and there are different types of attachments --> https://learn.microsoft.com/en-us/graph/api/resources/attachment?view=graph-rest-1.0
The Graph Nuget package returns an Attachment object, while the concrete type could be an actual FileAttachment. So to access ContentBytes you need to cast it to its concrete type.

No need for these workarounds.

Srinivasa Rao Darna 6,761 Reputation points Microsoft External Staff

2022-12-01T07:32:55.947+00:00

Hello @Elias Glor , Thanks for bringing up this, Check this post get-email-attachments-via-graph-api-missing-conten.html with (attach as FileAttachment).ContentBytes.

Answer 4

Ashley Fonseca 21

Thanks for your help mate, this workaround works perfectly. I really appriciate your help. You save me lot of trobule and time to write powershell script as a workaround.

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Graph Email Attachment does not have Content or ContentBytes attributes

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