使用 Google Drive .NET API 创建文件的空响应

我正在尝试使用 Google Drive .NET API v3 将文件上传到我的云端硬盘。我的代码如下

static string[] Scopes = { DriveService.Scope.Drive,
                       DriveService.Scope.DriveAppdata,
                       DriveService.Scope.DriveFile,
                       DriveService.Scope.DriveMetadataReadonly,
                       DriveService.Scope.DriveReadonly,
                       DriveService.Scope.DriveScripts };
    static string ApplicationName = "Drive API .NET Quickstart";

    public ActionResult Index()
    {
        UserCredential credential;

        using (var stream =
            new FileStream("C:/Users/admin1/Documents/visual studio 2017/Projects/TryGoogleDrive/TryGoogleDrive/client_secret.json", FileMode.Open, FileAccess.Read))
        {
            string credPath = Environment.GetFolderPath(
                System.Environment.SpecialFolder.Personal);
            credPath = Path.Combine(credPath, ".credentials/drive-dotnet-quickstart.json");

            credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                Scopes,
                "user",
                CancellationToken.None,
                new FileDataStore(credPath, true)).Result;
            Debug.WriteLine("Credential file saved to: " + credPath);
        }

        // Create Drive API service.
        var service = new DriveService(new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName = ApplicationName,
        });

        // Define parameters of request.
        FilesResource.ListRequest listRequest = service.Files.List();
        listRequest.PageSize = 10;
        listRequest.Fields = "nextPageToken, files(id, name)";

        // List files.
        IList<Google.Apis.Drive.v3.Data.File> files = listRequest.Execute()
            .Files;
        Debug.WriteLine("Files:");
        if (files != null && files.Count > 0)
        {
            foreach (var file in files)
            {
                Debug.WriteLine("{0} ({1})", file.Name, file.Id);
            }
        }
        else
        {
            Debug.WriteLine("No files found.");
        }

        var fileMetadata = new Google.Apis.Drive.v3.Data.File()
        {
            Name = "report.csv",
            MimeType = "text/csv",
        };
        FilesResource.CreateMediaUpload request;
        using (var stream = new FileStream("C:/debugging/report.csv",
                                FileMode.Open))
        {
            request = service.Files.Create(
                fileMetadata, stream, "text/csv");
            request.Fields = "id";
            request.Upload();
        }
        var response = request.ResponseBody;
        Console.WriteLine("File ID: " + response.Id);

        return View();        
    }

我面临的问题是响应始终为空。我进一步查看了一下，发现该请求返回了 403 resultCode。我还看了一些关于SO的其他问题this https://stackoverflow.com/questions/39468798/google-drive-api-v3-response-null and this https://stackoverflow.com/questions/19021931/google-drive-api-v2-insertmediaupload-null-response-received?rq=1但两者都没有任何帮助。

编辑：我忘了提及代码的第一部分工作正常 - 它列出了我的云端硬盘中的所有文件。只有第二部分不起作用（上传文件部分）

    string[] Scopes = { DriveService.Scope.Drive };

• 更改 Drive 范围，然后删除文件 token.json
• 在 vs2017 中，当 client_secret.json 文件存在时，您可以在 token.json 文件夹中看到 token.json 文件。