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c# google drive upload file

Hi I want to upload file google drive but every time ,
I have this error Object reference not set to an instance of an object. I do every think this video series link.I accepted google drive upload request.
I tried zip , jpg, txt upload but same error.
And I try Google.Apis.Drive.v2 but same error.
What can I do? Please help sorry my English :(
private static string ApplicationName = "MysqlYedekleme";
private static string FolderId = "1g_PTi5lQBCbZBax_3foZPdiECOC7cSaU";
private static string filename = "test.rar";
private static string filePath = #"E:\yedekdeneme\test.rar";
private static string contentType = "application/zip";
//drve
private void Form1_Load(object sender, EventArgs e)
{
UserCredential credential = GetUserCredential();
DriveService service = GetDriveService(credential);
uploadFileDrive(service, filename, filePath, contentType);
}
private static UserCredential GetUserCredential()
{
using (var stream = new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
{
string creadPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
creadPath = Path.Combine(creadPath, "driveApiCredentials", "drive-credentials.json");
return GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
Scopes,
"User",
CancellationToken.None,
new FileDataStore(creadPath, true)).Result;
}
}
private static DriveService GetDriveService(UserCredential credential)
{
return new DriveService
(new BaseClientService.Initializer
{
HttpClientInitializer = credential,
ApplicationName = ApplicationName,
});
}
private static string uploadFileDrive(DriveService service, string filename, string filePath, string contentType)
{
try
{
var fileMetadata = new Google.Apis.Drive.v3.Data.File();
fileMetadata.Name = Path.GetFileName(filePath);
fileMetadata.MimeType = "application/zip";
fileMetadata.Parents = new List<string> { FolderId };
FilesResource.CreateMediaUpload request;
using (var stream = new System.IO.FileStream(filePath, System.IO.FileMode.Open))
{
request = service.Files.Create(fileMetadata, stream, contentType);
request.Fields = "id";
request.Upload();
}
var file = request.ResponseBody;
return file.Id;
}
catch (Exception exc)
{
System.Diagnostics.Debug.WriteLine("geldi:"+exc.Message);
}
}

How to create folders in google drive without duplicate using c#?

I am trying to create a folder on my google drive and check if it already exists. I am new to c#, so I wrote a code to create a specific folder in which I can upload my CSV files, but each time my application runs, it creates a duplicate folder with same name and I am now trying to figure out how to stop it.
class GoogleApi
{
private string[] Scopes = { DriveService.Scope.Drive };
private string ApplicationName;
private string FolderId;
private string FileName;
private string FilePath;
private string ContentType;
public GoogleApi(string fileName, string filePath)
{
ApplicationName = "MantisToDrive";
ContentType = "text/csv";
FileName = fileName;
FilePath = filePath;
}
public void Upload()
{
UserCredential credential = GetCredentials();
DriveService service = GetDriveService(credential);
FolderId = CreateFolderToDrive(service, "MantisData");
UploadFileToDrive(service, FileName, FilePath, ContentType);
}
private DriveService GetDriveService(UserCredential credential)
{
return new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = ApplicationName,
});
}
//verify User Credentials using client_secret.json file
private UserCredential GetCredentials()
{
UserCredential credential;
using (var stream = new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
{
string credPath = System.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;
}
return credential;
}
private string UploadFileToDrive(DriveService service, string fileName, string filePath, string contentType)
{
var fileMatadata = new Google.Apis.Drive.v3.Data.File();
fileMatadata.Name = fileName;
fileMatadata.Parents = new List<string> { FolderId };
FilesResource.CreateMediaUpload request;
using (var stream = new FileStream(filePath, FileMode.Open))
{
request = service.Files.Create(fileMatadata, stream, contentType);
//service.Files.Delete(fileName).Execute();
request.Upload();
}
var file = request.ResponseBody;
return file.Id;
}
// creating folder in google drive to store CSV
public static string CreateFolderToDrive(DriveService service, string folderName)
{
bool exists = Exists(service,folderName);
if (exists)
return $"Sorry but the file {folderName} already exists!";
var file = new Google.Apis.Drive.v3.Data.File();
file.Name = folderName;
file.MimeType = "application/vnd.google-apps.folder";
var request = service.Files.Create(file);
request.Fields = "id";
var result = request.Execute();
return result.Id;
}
private static bool Exists(DriveService service, string name)
{
var listRequest = service.Files.List();
listRequest.PageSize = 100;
listRequest.Q = $"trashed = false and name contains '{name}' and 'root' in parents";
listRequest.Fields = "files(name)";
var files = listRequest.Execute().Files;
foreach (var file in files)
{
if (name == file.Name)
return true;
}
return false;
}
}

This should work (this checks whether the folder exists in your root folder. If not, the method will create a folder):
public static string CreateFolder(string folderName)
{
bool exists = Exists(folderName);
if (exists)
return $"Sorry but the file {folderName} already exists!";
var file = new Google.Apis.Drive.v3.Data.File();
file.Name = folderName;
file.MimeType = "application/vnd.google-apps.folder";
var request = service.Files.Create(file);
request.Fields = "id";
return request.Execute().Id;
}
private static bool Exists(string name)
{
var listRequest = service.Files.List();
listRequest.PageSize = 100;
listRequest.Q = $"trashed = false and name contains '{name}' and 'root' in parents";
listRequest.Fields = "files(name)";
var files = listRequest.Execute().Files;
foreach (var file in files)
{
if (name == file.Name)
return true;
}
return false;
}
In case somebody comes here from the future and the pastebin link is dead. This is how you can upload a file to your google drive:
public static async Task UploadFileAsync(string fileName)
{
var file = new Google.Apis.Drive.v3.Data.File();
file.Name = Path.GetFileName(fileName);
file.Parents = new List<string> {folderID};
byte[] byteArray = System.IO.File.ReadAllBytes(fileName);
using (System.IO.MemoryStream stream = new System.IO.MemoryStream(byteArray))
{
await service.Files.Create(file, stream, "some mime type").UploadAsync();
}
}

How I upload mp3 file in Google drive using C# in MVC

I have successfully uploaded image file in google drive using C#. But i am facing problem in uploading mp3 file on drive.
How I upload mp3 file in Google drive using C# in MVC?
this my Code for save file:
public ServieResponse SaveFileOnGoogleDrive(string url)
{
//string url = string.Empty; ; ;
//string[] scopes = new string[] { DriveService.Scope.Drive,
// DriveService.Scope.DriveFile};
string[] scopes = new string[] { DriveService.Scope.Drive,
DriveService.Scope.DriveAppdata,
//DriveService.Scope.DriveAppsReadonly,
DriveService.Scope.DriveFile,
DriveService.Scope.DriveMetadataReadonly,
DriveService.Scope.DriveReadonly,
DriveService.Scope.DriveScripts };
var clientId = "xxxxxx"; // From https://console.developers.google.com
var clientSecret = "xxxxxxx";
// From https://console.developers.google.com
// here is where we Request the user to give us access, or use the Refresh Token that was previously stored in %AppData%
var credential = GoogleWebAuthorizationBroker.AuthorizeAsync(new ClientSecrets
{
ClientId = clientId,
ClientSecret = clientSecret
},
scopes,
Environment.UserName,
CancellationToken.None,
new FileDataStore("MyAppsToken")).Result;
//Once consent is recieved, your token will be stored locally on the AppData directory, so that next time you wont be prompted for consent.
DriveService service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "CTM",
});
string filePath = WebConfigurationManager.AppSettings["filPath"];
filePath = HttpContext.Current.Server.MapPath(filePath) + url;
uploadFile(service, filePath, "", "");
// service.HttpClient.Timeout = TimeSpan.FromMinutes(100);
//Long Operations like file uploads might timeout. 100 is just precautionary value, can be set to any reasonable value depending on what you use your service for.
//return Json(new { result = "abc" }, JsonRequestBehavior.AllowGet);
ServieResponse ob = new ServieResponse();
ob.ResponseMsg = "Success";
return ob;
}

Now my code is working fine. Updated code is:
public ServieResponse SaveFileOnGoogleDrive(string url)
{
//string url = string.Empty; ; ;
//string[] scopes = new string[] { DriveService.Scope.Drive,
// DriveService.Scope.DriveFile};
string[] scopes = new string[] { DriveService.Scope.Drive,
DriveService.Scope.DriveAppdata,
//DriveService.Scope.DriveAppsReadonly,
DriveService.Scope.DriveFile,
DriveService.Scope.DriveMetadataReadonly,
DriveService.Scope.DriveReadonly,
DriveService.Scope.DriveScripts };
var clientId = "65675933715-poet7f7dhjhrmccmalhb41pltho7tusr.apps.googleusercontent.com"; // From https://console.developers.google.com
var clientSecret = "D8USyz3Pf82wOMi6l2pJehjx";
// From https://console.developers.google.com
// here is where we Request the user to give us access, or use the Refresh Token that was previously stored in %AppData%
var credential = GoogleWebAuthorizationBroker.AuthorizeAsync(new ClientSecrets
{
ClientId = clientId,
ClientSecret = clientSecret
},
scopes,
Environment.UserName,
CancellationToken.None,
new FileDataStore("MyAppsToken")).Result;
//Once consent is recieved, your token will be stored locally on the AppData directory, so that next time you wont be prompted for consent.
DriveService service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "CTM",
});
string filePath = WebConfigurationManager.AppSettings["filPath"];
filePath = HttpContext.Current.Server.MapPath(filePath) + url;
uploadFile(service, filePath);
ServieResponse ob = new ServieResponse();
ob.ResponseMsg = "Success";
return ob;
}
public static void uploadFile(DriveService _service, string _uploadFile)
{
if (System.IO.File.Exists(_uploadFile))
{
var body = new Google.Apis.Drive.v3.Data.File();
//File body = new File();
body.Name = System.IO.Path.GetFileName(_uploadFile);
//body.Description = _descrp;
body.MimeType = GetMimeType(_uploadFile);
// body.Parents = new List<ParentReference>() { new ParentReference() { Id = _parent } };
FilesResource.CreateMediaUpload request;
try
{
using (var stream = new System.IO.FileStream(_uploadFile, System.IO.FileMode.Open))
{
request = _service.Files.Create(body, stream, body.MimeType);
request.Fields = "id";
request.Upload();
}
var file = request.ResponseBody;
var fili = file.Id;
}
catch (Exception e)
{
}
}
else
{
}
}
private static string GetMimeType(string fileName)
{
string mimeType = "application/unknown";
string ext = System.IO.Path.GetExtension(fileName).ToLower();
Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext);
if (regKey != null && regKey.GetValue("Content Type") != null)
mimeType = regKey.GetValue("Content Type").ToString();
return mimeType;
}

How To create an instance of Google BaseClientService.Initializer

I want to know how to create an instance of Google BaseClientService.Initializer. I need to use the BaseClientService.Initializer to create the GmailService instance, and then use this GmailService instance to create an UsersResource instance.
Google.Apis.Services.BaseClientService.Initializer initializer = new BaseClientService.Initializer();
initializer.ApiKey = "MyApiKey";
initializer.ApplicationName = "MyProject";
initializer.DefaultExponentialBackOffPolicy = Google.Apis.Http.ExponentialBackOffPolicy.None;
Google.Apis.Gmail.v1.GmailService gmailService = new GmailService(initializer);
Google.Apis.Gmail.v1.UsersResource usersResource = new UsersResource(gmailService);
UsersResource.MessagesResource messagesResource = usersResource.Messages;

First go to the link bellow and open an application in your google account.
once you run the code you'll get exception for the first time, given you an address to go and enable the API in your google account.
https://console.developers.google.com/apis/dashboard?project=super-pharm-log-notifications
static string[] Scopes = { GmailService.Scope.GmailCompose, GmailService.Scope.GmailSend, GmailService.Scope.GmailInsert };
static private BaseClientService.Initializer initializeGmailAccountServices()
{
string appRoot = null;
if (System.Web.HttpContext.Current == null)
{
appRoot = Environment.CurrentDirectory;
}
else
{
appRoot = System.Web.HttpContext.Current.Server.MapPath(#"~\");
}
string path = Path.Combine(appRoot, DBConstants.GMAIL_CREDENTIALS_PATH);
UserCredential credential;
using (var stream = new FileStream(path, FileMode.Open, FileAccess.Read))
{
ClientSecrets secrets = GoogleClientSecrets.Load(stream).Secrets;
var t = GoogleWebAuthorizationBroker.AuthorizeAsync(secrets, Scopes, "user", CancellationToken.None);
t.Wait();
credential = t.Result;
}
return= new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "your application name",
};
}
private static string Base64UrlEncode(string input)
{
var inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
// Special "url-safe" base64 encode.
return Convert.ToBase64String(inputBytes)
.Replace('+', '-')
.Replace('/', '_')
.Replace("=", "");
}

How to upload file to google drive with asp.net web application?

I used code for upload for console application.
its working but for web client api.. its not working for web application ...
I got null for Responsebody=null.
here is my code:
ClientSecrets secrets = new ClientSecrets()
{
ClientId = parameters.ClientId,
ClientSecret = parameters.ClientSecret
};
var token = new TokenResponse { RefreshToken = parameters.RefreshToken };
var credentials = new UserCredential(new GoogleAuthorizationCodeFlow(
new GoogleAuthorizationCodeFlow.Initializer
{
ClientSecrets = secrets
}),
Environment.UserName,
token);
var service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credentials,
ApplicationName = "Google Drive",
});
if (FileUpload1.HasFile)
{
var filename = FileUpload1.FileName;
var filepath = FileUpload1.PostedFile.FileName;
Google.Apis.Drive.v2.Data.File body = new Google.Apis.Drive.v2.Data.File();
body.Title = filename;
body.Description = "Documents";
body.MimeType =GetMimeType(filename);
body.Parents = new List<ParentReference>() { new ParentReference() { Id = "0BySorYm3rcaNeXV2Y0M5bXh1WjA" } };
//byte[] array = System.IO.File.ReadAllBytes(filepath);
MemoryStream stream = new MemoryStream(FileUpload1.FileBytes);
FilesResource.InsertMediaUpload fileuploadrequest = new FilesResource.InsertMediaUpload(service, body, stream, GetMimeType(filename));
//var name=MediaFileSource.GetContentTypeForFileName(filename);
//fileuploadrequest.Convert = true;
//fileuploadrequest.OauthToken=parameters.AccessToken;
fileuploadrequest.Upload();
//geting null using this code and also not getting error for upload
Google.Apis.Drive.v2.Data.File response = fileuploadrequest.ResponseBody;