c# - 尝试通过 ID 获取消息时出现 Microsoft.Graph.Models.ODataErrors.ODataError 错误。 Microsoft Graph GraphServiceClient

Question

当我尝试使用 GraphServiceClient 从共享邮箱下载电子邮件时，我不断收到引发了“Microsoft.Graph.Models.ODataErrors.ODataError”类型的异常。不支持 OData 请求。我用谷歌搜索了这个问题，但没有找到可用的解决方案。

最初以应用程序权限 Mail.ReadWrite 启动。从那里添加 Mail.Read、Mail.ReadBasic、Mail.ReadBasic.All 以查看是否有任何功能。下面是我正在使用的代码示例。

ClientSecretCredential? _clientSecretCredential = new ClientSecretCredential(_settings.TenantId, _settings.ClientId, _settings.ClientSecret);
var graphServiceClient = new GraphServiceClient(_clientSecretCredential,new[] { "https://graph.microsoft.com/.default" });
var messages = await graphServiceClient.Users["<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9ffaf2fef6f3dffefcfcf0eaf1ebb1fcf0f2" rel="noreferrer noopener nofollow">[email protected]</a>"].MailFolders["inbox"].Messages.GetAsync(); 
//messages returns 3 emails  
foreach (var message in messages.Value)
{
    //this throws the error---------------------------------------
    var messageStream = await graphServiceClient
                  .Users["<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="32575f535b5e725351515d475c461c515d5f" rel="noreferrer noopener nofollow">[email protected]</a>"]
                  .MailFolders["inbox"]
                  .Messages[message.Id]
                  .Content
                  .GetAsync();
       //---------------------------------------------------------------
    string path = "File_Path.eml";
    using (FileStream fs = new FileStream(path, FileMode.CreateNew))
    {
        messageStream.CopyTo(fs);
    }
}

如果您能想到 Azure 配置方面存在任何问题，我们将不胜感激。

更新:根据下面的答案，从消息请求中删除 .MailFolders["inbox"] 并添加 TokenCredentialOptions 解决了该问题。

Answer 1

• 我已按照要求进行了尝试，但我也遇到了与您相同的错误。

• 然后，我更新了代码，请查看下面。

using Azure.Identity;
using Microsoft.Graph;
using System;
using System.IO;

namespace GraphApp
{
    class MSGraph
    {
        static async Task Main(string[] args)
        {
            var scopes = new[] { "https://graph.microsoft.com/.default" };
            var tenantId = "tenant_Id";
            var clientId = "client_Id";
            var clientSecret = "client_Secret";
            var options = new TokenCredentialOptions
            {
                AuthorityHost = AzureAuthorityHosts.AzurePublicCloud
            };
            var clientSecretCredential = new ClientSecretCredential(tenantId, clientId, clientSecret, options);
            var graphClient = new GraphServiceClient(clientSecretCredential, scopes);

            try
            {
                var message = await graphClient.Users["User_UPN"]
                    .MailFolders["inbox"]
                    .Messages["message_ID"]
                    .GetAsync();

                var mimeContentStream = await graphClient.Users["User_ID"]
                    .Messages[message.Id]
                    .Content
                    .GetAsync();

                using (var fileStream = File.Create("C:\\Users\\xxxxxxx\\Desktop\\web1\\lastemail.eml"))
                {
                    mimeContentStream.Seek(0, SeekOrigin.Begin);
                    await mimeContentStream.CopyToAsync(fileStream);
                }

                Console.WriteLine("Email message downloaded successfully.");
            }
            catch (ServiceException ex)
            {
                Console.WriteLine($"Error accessing the Graph API: {ex.Message}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"An error occurred: {ex.Message}");
            }
        }
    }
}

• 当我执行上述代码时，.eml 文件成功下载到下面的给定路径

引用文献:

• 引自 Glen Scales - How to Download a Mail | Graph API | C# .