如何为DotNetOpenAuth编写VB或C＃GUI客户端？

Question

我正在学习如何使用Google Calendar API，这反过来要求我学习如何使用DotNetOpenAuth访问Google帐户。 我使提供的示例工作，并在Console程序中编写工作代码以访问和操作日历。

我现在想要编写一个Windows窗体应用程序（在C＃或VB中）来做同样的事情。 我不能让OAuth2进程在GUI应用程序中工作。 它编译并运行，但不起作用。 基于我到目前为止所看到的，我得出结论，没有调用GetAuthorization（）函数。

我尝试从按钮单击，构造函数和表单Loader方法启动该过程。 我已经尝试过C＃和VB。

public GoogleCal()
{
    InitializeComponent();

    var provider = new NativeApplicationClient(
                           GoogleAuthenticationServer.Description);
    provider.ClientIdentifier = "xxxxx.apps.googleusercontent.com";
    provider.ClientSecret = "yyyyy";

    var auth = new OAuth2Authenticator<NativeApplicationClient>(
                       provider, GetAuthorization);
}

private IAuthorizationState GetAuthorization(NativeApplicationClient arg)
{
    // Get the auth URL:
    IAuthorizationState state = new AuthorizationState(new[] {
                               CalendarService.Scopes.Calendar.GetStringValue() });

    state.Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl);
    Uri authUri = arg.RequestUserAuthorization(state);

    // Request authorization from the user (by opening a browser window):
    Process.Start(authUri.ToString());
    authCodeText = Microsoft.VisualBasic.Interaction.InputBox(
                                                   "Paste code:", "title", "");

    // Retrieve the access token by using the authorization code:
    return arg.ProcessUserAuthorization(authCodeText, state);
}

我显然做错了什么，但我无法弄清楚它是什么。 有任何想法吗？

Answer 1

使用whelkaholism.blogspot上的教程，我能够做我想做的事情。 我采取了一种不同的方法（部分使用更新的OAuth2）。

我的C＃表单程序代码如下。

// Add references:
//      DotNetOpenAuth.dll
//      Google.Apis.dll
//      Google.Apis.Authentication.OAth2.dll
//      Newtonsoft.Json.Net35.dll
// plus, add references for whichever Google App(s) you want
//      Google.Apis.Calendar.v3.dll

// form contains at least the following:
//      button1: Button, start the authentication process
//      authCode: TextBox, to recive the auth code from Google
//      button2: Button, complete the authentication prop
//      textBox2: TextBox, multi-line, to display status message and output

// in addition to the libraries required for any forms program, use:
using System.Diagnostics;
using DotNetOpenAuth.OAuth2;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using Google.Apis.Calendar.v3;
using Google.Apis.Calendar.v3.Data;
using Google.Apis.Util;


// methods not related to authentication deleted for space

namespace GoogleCal
{
    public partial class GoogleCal : Form
    {
        private static String NL = Environment.NewLine;
        private static IAuthorizationState state;
        private static NativeApplicationClient provider;
        private static OAuth2Authenticator<NativeApplicationClient> auth;
        private static CalendarService calService;

        private void button1_Click(object sender, EventArgs e)
        {
            // clicked to initiate authentication process

            // provider and state are declared above as private static

            provider = new NativeApplicationClient(GoogleAuthenticationServer.Description);
            provider.ClientIdentifier = "<my id>.apps.googleusercontent.com";
            provider.ClientSecret = "<my secret>";

            // next line changes if you want to access something other than Calendar
            state = new AuthorizationState(new[] { CalendarService.Scopes.Calendar.GetStringValue() });
            state.Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl);
            Uri authUri = provider.RequestUserAuthorization(state);

            Process.Start(authUri.ToString());
        }

        private void button2_Click(object sender, EventArgs e)
        {
            // clicked after Google code is pasted into TextBox to complete authentication process

            // auth and calService are declared above as private static

            auth = new OAuth2Authenticator<NativeApplicationClient>(provider, GetAuthorization);

            // create the service object to use in other methods
            calService = new CalendarService(auth);

            textBox2.AppendText("Ready" + NL);
            textBox2.Update();
        }

        private IAuthorizationState GetAuthorization(NativeApplicationClient arg)
        {
            // state is declared above as private static
            // authCode is a TextBox on the form
            return arg.ProcessUserAuthorization(authCode.Text, state);
        }
    }
}