.Have you been trying to connect your website or application to Google Drive? Would you like to see a list of files or a list of Directories stored on Google Drive? Would you like to Upload a file to Google Drive or download a file from Google drive using C#.Net using Visual Studio. In this tutorial series, we will be looking into the, using the Google.net Client library which makes accessing Google APIs much simpler.

1. Google Drive Api Download

There are a lot of things you can do with the Google Drive API, Download files, Upload files, Change Files, Copy files, Delete Files, Trash Files, Create directory’s, delete directory’s. There is even a version of%appdata% on Google Drive where you can store your application specific files for each user. Parent ChildFiles and directories can have parents and children. The top level is Root so if the parent collection item has IsRoot set to true then you know you have hit the top. (Note:Root is not actually returned in the list). If you want to order things in a parent child tree.

All you need to do is look at the Parents collection on the file.SearchThere are a few issues with List. First of all if the user has “trashed” the folder List is still going to return it. This is where Search comes in, before you execute your list add a “Q” to it. Request.Q = 'trashed=false';Another nice search is if you only want to return directories. Request.Q = 'mimeType='application/vnd.google-apps.folder' and trashed=false';You can link searches together with.

Here is a link to the Api reference for Search. ConclusionYou should now understand how to access the Google Drive API with an authenticated user. You should also understand the difference between a files and directories, how to get a list of all of the files currently on Google drive. I hope you will also agree that working with the Google APIs is quite easy once you get the authentication down. I hope this lesson was able to get you started on your Google Drive development.Blog authors who like to make people happy and help them enjoy working with the Google APIs, release the code to go along with this tutorial on.Please Share.

DanI was working through your entire blog post and everything went well (using an instance of DriveService) until I came to the download section. My DriveService is instantiated by:Google.Apis.Services.BaseClientService.Initializer cManager;cManager = CredentialManager.getCredentials;var service = new Google.Apis.Drive.v2.DriveService(cManager);using the getCredentials method detailed in my SO question.Using the following:FilesResource.GetRequest getFile = service.Files.Get(file.Id);System.IO.Stream stream = getFile.ExecuteAsStream;the metadata for the file was pulled in json format.

It was at that point I reverted back to the google docs I linked to in my previous comment. JatinderHi Linda,Thanks for sharing a wonderful post. I am new to Google Drive and have following scenarios for which I am not able to find anything (not sure if anything exists or not)– I am creating a Windows app which will be SAAS based. Different Users will register and create their company logins and subusers under them.

Now I want them to put the google drive credentials in one of the form and this should work for rest of the users. Currently the problem is that while development I got the google log in done and it never asks for the login again but when testing on a different system with different login, it keeps asking for google login. I simply want admin users to put their google drive credentials and it should work for upload and download files for all the users for that company.– I want to keep versions of the same file (just like google drive does by default) on google drive. Lets say user A uploaded file xyz and then user B downloaded and changed file xyz and uploaded it on the drive again.I want 2 things here – only the changed content should get uploaded and not the whole file (this will save time for the user)2ndly I want to have history of the same file so I can show in my Windows applicationThanksJatinder. JatinderHi Linda,Thank you very much for your answer. It has really helped me to resolve the first issue but I am still looking for options for the 2nd part of first point as well as 2nd point.I will re-phrase below– I want my code to upload only the changedadded content so that it doesnt upload the whole file after user changed something– I want to maintain history like how google docs do so I can give the users the option to revert back to a particular revision numberBy the way I sent you an email through the contact form, not sure if you received it.ThanksJatinder.

Sabyasachi NandaI am trying to work on a web application using asp.net (with C#), that enables users to access files from their respective Google Drive. The code works perfectly in the native environment and I can view the files, and download them as per requirement.

However, when I hoist it on the local server (IIS), the program does not work. It doesn’t redirect to the Google Authentication page as required.

Worth mentions, while working on the local (native) system, I had used the client credentials for the native application and after hoisting it on the local server, I used the Client credentials for the web application (I also tried with the native credentials as well). Nothing seemed to work. Additionally, when I tried usingthe native credentials in the C# API run-time now it redirects to the authentication page but gives an error (redirect uri mismatch). Also, the redirect uri in the request keeps on changing every time I run the program. As informed now I am using Please help as I’m sure there is something I’m missing.

Michael BLinda, Great article!!!I have an ASP.NET application. I’m using the Google Picker in DocsView to allow the user to select one of their Google Drive files that when selected the ASP.NET will copy and share it to a number of other Google users from a list that is stored in the ASP.NET program. I have the selecting of the file finished and I am fixing to start the copy and share portionQuestion1: I have generated a Web application OAuth Client ID. Should I have created a different OAuth Client ID (Service account or Installed application)?Question2: Is there already an example of what I described above with the mixing of Google Picker and Google Drive API in an ASP.NET app?Thanks in advance!!!.

HyesunThanks for replying. I’ve tried to sign those assembly with a strong name, but I failed, so I solved it in other way using embedding those.dll files as resources. Thank you for your help, again. May I ask one more question? So, the.exe file works fine alone without the.dll files, but when I tested it in other computer, it doesn’t run I save all users log-in information (such as username and password) file in my google drive, and my application accesses the file to let user log in. I’m gonna change this log-in feature when I complete its web application, but for now I need to manage user log-in information using my google drive. I wanted to check other users can log in and use my application, so I tried to start the application in my other computer logged in my different google account.

I saw the consent screen, but it seems like my application accesses my different google account’s google drive, not the drive contains the users log-in information file. If it’s true, would you like to give me some idea to make other users able to log in the application through accessing my google drive?.

Google Drive Api Download

ThomasHi Linda. I really enjoy reading your blog.And I really appriciate that you are helping others use Googles APIs,since Google is not very good at documentation.I have a request though, could you make a step by step tutorial about how to use the Google Drive V2 REST API from c#? That is, only using HTTP/HTTPS request directly to do everything?That way it should be possible to interact with Google Drive without having to lug around any Google DLL files or similar(all quickstart examples in c# seems to lug around a HUGE amount of Google DLL files). ThomasThanks for your reply.I have found it very difficult to find adequate information about how to form valid https requests to the Google Drive V2 REST API.I am currently doing to login flow using Javascript and then I connect to a webservice, that I am writing in c#, that then attempts to give me a list of the files stored on my Google Drive.But I keep getting a 403 forbidden. Gopal BiswasI’m trying to develop the google service account and it works fine for me.I have mailed you some times ago for a problem and I think I have resolved the issue. The service account “Service account ID” is working as serviceAccountEmail.One problem I’m facing now, Suppose a folder has created in google drive named “UploadDocs” and I’m uploading files under this folder. The files are uploaded inside the folder successfully but I couldn’t see those uploaded files at all.

Is this happening for permissions for the folder “UploadDocs”? What is the process to give full permission to the folder “UploadDocs”?Please help. Simon JinThank you for your reply. I have one question though.I just wanted to see folders and files under root directory when i set ‘root’ in parents in Q, but I can see only file called “Get started” pdf file. (I used C# code)Where are my folders?But I can see folders when I search by name (ex. Name=’Folder1′) in the Code.Also I can see the folder output when I use Api test called “Try this API” which is on API help website.So only C# code does not show folders?Can you please tell me why it shows only files, not folders?FYI: I authenticated using Service account and used Google Drive v3 SDKThanks.

Post authorIf the only file you are seeing is “Get started” pdf file that is a sure sign that you are using a service account for authentication. Service accounts are not you. Think of it as a dummy user it has its own google drive account which by default has no files.Options:.

Upload files to the service account using the files.create method. Share a folder on your personal google drive account with the service account. You do this by taking the service account email address and sharing a folder with it.

Note: to my knowledge you cant share your personal root folder with anyone.Tip: If you are allowing the service account to upload files to your personal google drive account remember to have it grant your personal user permissions to access the files using permissions.create method or you are going to have files on your drive account that you dont have permissions to access.I am assuming this is also you. Simon JinDear Linda, Thank for your answer. You are right.Two questiones here– I created Non-Root directory and shared to my service account. The folder name is “MyRoot”. I guess there may be another directories that has same name with this one. /MyRoot/Folder1/Folder2/MyRoot) The aim is to get FileID of MyRoot (first level folder), but if we use name=’MyRoot’ in Q, we will have 2 result.

How can I solve this problem? For now as you know, we cannot list folders and file in root, so getting MyRoot without duplication is possible?– Can I access my service account’s drive on the google drive web?.

.Have you been trying to connect your website or application to Google Drive? Would you like to see a list of files or a list of Directories stored on Google Drive? Would you like to Upload a file to Google Drive or download a file from Google drive using C#.Net using Visual Studio.

In this tutorial series, we will be looking into the, using the Google.net Client library which makes accessing Google APIs much simpler. There are a lot of things you can do with the Google Drive API, Download files, Upload files, Change Files, Copy files, Delete Files, Trash Files, Create directory’s, delete directory’s.

There is even a version of%appdata% on Google Drive where you can store your application specific files for each user. RayYour articles have been a great help in enabling me to understand working with the Google Drive API. Using them I have managed to write a small program that can authenticate, down load a list of files and also using one of the file IDs download the file to my hard drive. However I cannot get a file to upload. Using the code above I get the same error as Ishay – Value cannot be null.

I am also using the ZLib.portable version 1.110.0. Sorry but I do not understand how to get past this problem. Can you please offer some help?. Akshita GuptaHi LyndaWRT my previous comment, I figured out the syntax of getting fields from v3 api to get webViewLink. Wanted to know the second part of how I can view it in browser. As this is the service account, the link generated tells needs permission. So when I add permission for another user, I can see the file inside the drive after logging in.

How can I get that share url or how can the service account delegate control such that the file opens up in browser after getting data from drive api?Web Search shows me using domain wide delegation and adding permissions for another user. I tried the permissions one and as told above, I wanted to pop the file in browser after getting results and not check in that user’s drive.Sorry about the long post but I am confused with the logic here. NebojsaHello Linda.I have problem from very beginning.When I use Your code (it’s vb.net):`Dim upl As FilesResource.InsertMediaUpload = service.Files.Insert(TheFile, IO.File.OpenRead(zipFilePath), TheFile.MimeType)`I got error: “Too many arguments to ‘Public Overridable Function Insert(body As Google.Apis.Drive.v2.Data.File) As Google.Apis.Drive.v2.FilesResource.InsertRequest’.”I just, can’t use service on this way at all.All required namespaces are imported.service.File.Insert just won’t be override.Thanks for help. Hi Linda, Thanks for your help.I know that it says “Website” in your initial paragraph but, can you confirm if its possible to use C# and Google Drive V2 for an asp.net (or other) project to let the users upload files to a service account? Its necessary for me because I dont want to use the transfer montly quote when the users upload their files.PS: I did before some VB.Net and C# desktop apps that upload files to a service account but I’m not sure if this could be useful to apply it in websites.Regards.