アプリで Google ドライブの使用を実装しようとしていますが、次のエラーが発生しているようです"Method 'get_Error' in type 'Google.Apis.Drive.v2.Data.FileList' from assembly 'Google.Apis.Drive.v2, Version=1.2.4647.29713, Culture=neutral, PublicKeyToken=null' does not have an implementation"
。なぜこれが起こっているのか誰にも分かりますか?Google が提供するタスク API の例に基づいてコードを作成しました。
以下のコード:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Util;
using System.Diagnostics;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth2;
using Google.Apis.Authentication;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using Google.Apis.Util;
using PrepHub.PrepHub;
using System.Web.Services;
using System.Threading;
using Google.Apis;
using Google.Apis.Drive.v2.Data;
using Google.Apis.Drive.v2;
using Google.Apis.Drive;
namespace DriveExample
{
public partial class GDrive : System.Web.UI.Page
{
private static DriveService _service; // We don't need individual service instances for each client.
private OAuth2Authenticator<WebServerClient> _authenticator;
private IAuthorizationState _state;
private IAuthorizationState AuthState
{
get
{
return _state ?? HttpContext.Current.Session["AUTH_STATE"] as IAuthorizationState;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (_service == null)
{
_service = new DriveService(_authenticator = CreateAuthenticator());
}
if (HttpContext.Current.Request["code"] != null)
{
_authenticator = CreateAuthenticator();
_authenticator.LoadAccessToken();
}
var ni = _service.Files.List().Fetch();
}
private OAuth2Authenticator<WebServerClient> CreateAuthenticator()
{
var provider = new WebServerClient(GoogleAuthenticationServer.Description);
provider.ClientIdentifier = ClientCredentials.ClientID;
provider.ClientSecret = ClientCredentials.ClientSecret;
var authenticator =
new OAuth2Authenticator<WebServerClient>(provider, GetAuthorization) { NoCaching = true };
return authenticator;
}
private IAuthorizationState GetAuthorization(WebServerClient client)
{
// If this user is already authenticated, then just return the auth state.
IAuthorizationState state = AuthState;
if (state != null)
{
return state;
}
// Check if an authorization request already is in progress.
state = client.ProcessUserAuthorization(new HttpRequestInfo(HttpContext.Current.Request));
if (state != null && (!string.IsNullOrEmpty(state.AccessToken) || !string.IsNullOrEmpty(state.RefreshToken)))
{
// Store and return the credentials.
HttpContext.Current.Session["AUTH_STATE"] = _state = state;
return state;
}
string scope = DriveService.Scopes.Drive.GetStringValue();
OutgoingWebResponse response = client.PrepareRequestUserAuthorization(new[] { scope });
response.Send();
return null;
}
}
}