Updating Microsoft Teams Chats and Managing Attachments via Microsoft Graph API in C# .NET6

Amit 671

Hi,

I want to update Microsoft Teams Chats (one-on-one / Channel) programmatically via C# .NET6. Additionally, I want to download and delete attachments.

I see that the Microsoft Graph API has an "Update chatMessage" section, but it is not working for me.

https://learn.microsoft.com/en-us/graph/api/chatmessage-update?view=graph-rest-1.0&tabs=http

Can someone please confirm if we can update/delete chat messages and delete and download attachments via the Graph API?

If yes, could you provide any sample code?

Thank you.

Prasad-MSFT 5,891 Reputation points Microsoft Vendor

2024-06-17T07:17:28.93+00:00

Updating a Chat Message: To update a chat message, you can use the PATCH request to the /chats/{chat-id}/messages/{message-id} endpoint.

https://learn.microsoft.com/en-us/graph/api/chatmessage-update?view=graph-rest-1.0&tabs=http

Deleting a Chat Message: To delete a chat message, you can send a DELETE request to the /chats/{chat-id}/messages/{message-id} endpoint.

https://learn.microsoft.com/en-us/graph/api/chatmessage-softdelete?view=graph-rest-1.0&tabs=http

Downloading an Attachment: To download an attachment, you first need to get the attachment ID using a GET request to the /chats/{chat-id}/messages/{message-id}/attachments endpoint. Then, you can download the attachment using the GET request to the /chats/{chat-id}/messages/{message-id}/attachments/{attachment-id}/$value endpoint.

Deleting an Attachment: Currently, the Graph API does not support directly deleting an attachment from a chat message.
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Amit 671

Thanks for your response @Prasad-MSFT ,

I have given application-level permission in Azure APP, and it contains Chat.ReadWrite.All Permission.

Below is my code.

public async Task UpdateChatMessage(string accessToken, string chatThreadId, string messageId, string newContent)
{
    using (var httpClient = new HttpClient())
    {
        // Set the authorization header with the bearer token
        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
        // The endpoint to update the chat message
        var endpoint = $"https://graph.microsoft.com/v1.0/chats/{chatThreadId}/messages/{messageId}";
        // The content to update the chat message
        var updateContent = new
        {
            body = new
            {
                content = newContent
            }
        };
        // Convert the update content to JSON
        var jsonContent = new StringContent(Newtonsoft.Json.JsonConvert.SerializeObject(updateContent), Encoding.UTF8, "application/json");
		
		
        // Send the PATCH request
        var request = new HttpRequestMessage(new HttpMethod("PATCH"), endpoint) { Content = jsonContent };
        var response = httpClient.SendAsync(request).Result;
        if (response.IsSuccessStatusCode)
        {
            Console.WriteLine("Chat message updated successfully.");
        }
        else
        {
            var responseBody = await response.Content.ReadAsStringAsync();
            Console.WriteLine($"Error updating chat message: {response.StatusCode}");
            Console.WriteLine(responseBody);
        }
    }
}

I am getting below error:

{"error":{"code":"NotFound","message":"PATCH is not supported on specified properties","innerError":{"date":"2024-06-18T06:48:26","request-id":"e1606a3c-fbef-46ae-a407-9272a40d72af","client-request-id":"e1606a3c-fbef-46ae-a407-9272a40d72af"}}}

1 answer

Prasad-MSFT 5,891 Reputation points Microsoft Vendor

2024-06-17T12:53:35.2433333+00:00

Yes, you can update and delete chat messages as well as delete and download attachments via the Microsoft Graph API.

Updating a Chat Message: To update a chat message, you can use the PATCH request to the /chats/{chat-id}/messages/{message-id} endpoint.

https://learn.microsoft.com/en-us/graph/api/chatmessage-update?view=graph-rest-1.0&tabs=http

Deleting a Chat Message: To delete a chat message, you can send a DELETE request to the /chats/{chat-id}/messages/{message-id} endpoint.

https://learn.microsoft.com/en-us/graph/api/chatmessage-softdelete?view=graph-rest-1.0&tabs=http

Downloading an Attachment: To download an attachment, you first need to get the attachment ID using a GET request to the /chats/{chat-id}/messages/{message-id}/attachments endpoint. Then, you can download the attachment using the GET request to the /chats/{chat-id}/messages/{message-id}/attachments/{attachment-id}/$value endpoint.

Deleting an Attachment: Currently, the Graph API does not support directly deleting an attachment from a chat message. You would need to update the message to remove the attachment reference.

Thanks,

Prasad Das

*************************************************************************

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Amit 671 Reputation points

2024-06-19T09:27:43.7566667+00:00

Thanks for your response @Prasad-MSFT ,

I have given application-level permission in Azure APP, and it contains Chat.ReadWrite.All Permission.

Below is my code.

public async Task UpdateChatMessage(string accessToken, string chatThreadId, string messageId, string newContent) { using (var httpClient = new HttpClient()) { // Set the authorization header with the bearer token httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken); // The endpoint to update the chat message var endpoint = $"https://graph.microsoft.com/v1.0/chats/{chatThreadId}/messages/{messageId}"; // The content to update the chat message var updateContent = new { body = new { content = newContent } }; // Convert the update content to JSON var jsonContent = new StringContent(Newtonsoft.Json.JsonConvert.SerializeObject(updateContent), Encoding.UTF8, "application/json"); // Send the PATCH request var request = new HttpRequestMessage(new HttpMethod("PATCH"), endpoint) { Content = jsonContent }; var response = httpClient.SendAsync(request).Result; if (response.IsSuccessStatusCode) { Console.WriteLine("Chat message updated successfully."); } else { var responseBody = await response.Content.ReadAsStringAsync(); Console.WriteLine($"Error updating chat message: {response.StatusCode}"); Console.WriteLine(responseBody); } } }

I am getting below error:

{"error":{"code":"NotFound","message":"PATCH is not supported on specified properties","innerError":{"date":"2024-06-18T06:48:26","request-id":"e1606a3c-fbef-49ae-a407-9272a40d72af","client-request-id":"e1616a3c-fbef-46ae-a407-9272a40d72af"}}}
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Updating Microsoft Teams Chats and Managing Attachments via Microsoft Graph API in C# .NET6

1 answer