.NET Code Samples

using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;

/*
 * External dependencies, OAuth 2.0 support, and core client libraries are at:
 *   https://developers.google.com/api-client-library/dotnet/apis/
 * Also see the Samples.zip file for the Google.Apis.Samples.Helper classes at:
 *   https://github.com/youtube/api-samples/tree/master/dotnet
 */

using DotNetOpenAuth.OAuth2;

using Google.Apis.Authentication;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using Google.Apis.Samples.Helper;
using Google.Apis.Services;
using Google.Apis.Util;
using Google.Apis.Youtube.v3;
using Google.Apis.Youtube.v3.Data;

namespace dotnet
{
  class papi_my_managed_channels
  {
    static void Main(string[] args)
    {
      CommandLine.EnableExceptionHandling();
      CommandLine.DisplayGoogleSampleHeader("YouTube Partner API: My Managed Channels");

      var credentials = PromptingClientCredentials.EnsureFullClientCredentials();
      var provider = new NativeApplicationClient(GoogleAuthenticationServer.Description)
      {
        ClientIdentifier = credentials.ClientId,
        ClientSecret = credentials.ClientSecret
      };
      var auth = new OAuth2Authenticator<NativeApplicationClient>(provider, GetAuthorization);

      var youtube = new YoutubeService(new BaseClientService.Initializer()
      {
        Authenticator = auth
      });

      var contentOwnerId = CommandLine.RequestUserInput<string>("Content Owner ID");

      var nextPageToken = "";
      while (nextPageToken != null)
      {
        var channelsListRequest = youtube.Channels.List("snippet");
        channelsListRequest.MaxResults = 50;
        channelsListRequest.ManagedByMe = true;
        channelsListRequest.OnBehalfOfContentOwner = contentOwnerId;
        channelsListRequest.PageToken = nextPageToken;

        var channelsListResponse = channelsListRequest.Fetch();

        foreach (var channelItem in channelsListResponse.Items)
        {
          CommandLine.WriteLine(String.Format("{0} ({1})", channelItem.Snippet.Title, channelItem.Id));
        }

        nextPageToken = channelsListResponse.NextPageToken;
      }
      
      CommandLine.PressAnyKeyToExit();
    }

    private static IAuthorizationState GetAuthorization(NativeApplicationClient client)
    {
      var storage = MethodBase.GetCurrentMethod().DeclaringType.ToString();
      var key = "storage_key";

      IAuthorizationState state = AuthorizationMgr.GetCachedRefreshToken(storage, key);
      if (state != null)
      {
        client.RefreshToken(state);
      }
      else
      {
        state = AuthorizationMgr.RequestNativeAuthorization(client, YoutubeService.Scopes.YoutubeReadonly.GetStringValue(), YoutubeService.Scopes.Youtubepartner.GetStringValue());
        AuthorizationMgr.SetCachedRefreshToken(storage, key, state);
      }

      return state;
    }
  }
}