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I am using Below piece of code to get files with service account.

        var certificate = new X509Certificate2("D:\\05-privatekey.p12", "notasecret", X509KeyStorageFlags.Exportable);
        var privateKey = certificate.Export(X509ContentType.Cert);
        var provider = new AssertionFlowClient(GoogleAuthenticationServer.Description, certificate)
        {
            ServiceAccountId = "877564787679-glrhdp0gclc9mbj77qe4998dkc6mfj62@developer.gserviceaccount.com",
            Scope = DriveService.Scopes.Drive.GetStringValue(),
            ServiceAccountUser = "[email protected]"
        };
        var auth = new OAuth2Authenticator<AssertionFlowClient>(provider, AssertionFlowClient.GetState);
        DriveService service = new DriveService(new BaseClientService.Initializer()
        {
            Authenticator = auth,
            ApplicationName = "My APP",
        });

        FilesResource.ListRequest request = service.Files.List();
        FileList files = request.Execute();

Here Execute() api is giving exception

Error occurred while sending a direct message or getting the response.

Edit: Project is based on the settings mentioned @ https://code.google.com/p/google-api-dotnet-client/wiki/Build

Edit 2: I have proper settings in CPanel based on service account

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Did you go through the delegation that's explained on developers.google.com/drive/delegation? –  Burcu Dogan Jul 17 '13 at 13:05
    
Thanks Burcu, It starts working.... I have created a new Google APP account and did the setting mentioned @ developers.google.com/drive/delegation....But I think It takes some time to take effect....:-) –  Jeevan Jul 17 '13 at 13:15
    
Good to know it's working now. –  Burcu Dogan Jul 17 '13 at 20:57
    
Hi @Jeevan I am also trying to do the same.But every time they want authentication.Can you please help me in that.My mail id [email protected]. Can you please share your code with me. –  amit ghosh Jul 20 '13 at 9:21
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1 Answer

up vote 0 down vote

I was having the same problem. I got it working eventually; I had a few things wrong.

  1. I went to the Google Cloud Console and regenerated and downloaded my key file. Go to APIs & auth->Registered Apps.
  2. The ONLY properties I put in the provider object are .ServiceAccountId and .Scope.
  3. I had to replace Scope with the actual scope and not use the enum value (This is only a problem because I am using VB). I'm working in Fusion Tables and the scope was rendering as just "Fusiontables" because VB.NET does not use the GetStringValue() enum function. Now I'm using "https://www.googleapis.com/auth/fusiontables". Go here for a list of valid scopes.
  4. For the ServiceAccountId, I used the service account "Email address:" with the "@" in it. ([email protected]), and not the one they label as a "Client ID:" in the console (12345.apps.googleusercontent.com).

Hopefully this helps others.

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