Xamarin Android：為什么對 azure 活動目錄的身份驗證不起作用

Question

大家好我叫谷口

我正在嘗試對 azure 活動目錄進行身份驗證，但代碼 sintaxe 顯示錯誤。

認證界面：

public interface IAuthenticator
{
    Task<AuthenticationResult> Authenticate(string authority, string resource, string clientId, string returnUri);
}

驗證器 class：

[assembly: Xamarin.Android.Dependency(typeof(App11.Authenticator))]
public class Authenticator : IAuthenticator
{
    public async Task<AuthenticationResult> Authenticate(string authority, string resource, string clientId, string returnUri)
    {
        var authContext = new AuthenticationContext(authority);
        if (authContext.TokenCache.ReadItems().Count() > 0)
            authContext = new AuthenticationContext(authContext.TokenCache.ReadItems().First().Authority);
        var uri = new Uri(returnUri);

        var platformParams = new PlatformParameters((Activity)Android.Context);
        var authResult = await authContext.AcquireTokenAsync(resource, clientId, uri, platformParams);
        return authResult;
    }
}

我在哪里調用身份驗證：

public class MainActivity : AppCompatActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.activity_main);
        Authenticate();
    }

    public async void Authenticate()
    {
        string Nome_Usuario = "taniguchi.sales@ax4b.com";
        string clientId = "2b121ed5-9fe6-4ddf-bdea-9bbe8cd37bd0";
        string authority = "https://login.microsoftonline.com/ax4b.com";
        string returnUri = "https://ax4bdev.crm2.dynamics.com";
        string graphResourceUri = "https://ax4bdev.crm2.dynamics.com";
        var auth = Xamarin.Android.DependencyService.Get<IAuthenticator>();
        var data = await auth.Authenticate(authority, graphResourceUri, clientId, returnUri);
    }

    protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
    {
        base.OnActivityResult(requestCode, resultCode, data);
        AuthenticationAgentContinuationHelper.SetAuthenticationAgentContinuationEventArgs(requestCode, resultCode, data);
    }

線路：

[assembly: Xamarin.Android.Dependency(typeof(App11.Authenticator))]

顯示錯誤：錯誤 CS0234 命名空間“Xamarin.Android”中不存在類型或命名空間名稱“DependencyAttribute”（您是否缺少程序集引用？）

Answer 1

[組件：Xamarin.Android.Dependency(typeof(App11.Authenticator))]

DependencyService is usually used in Xamarin.Forms ,but now you are Xamarin.Android project.you dont need IAuthenticator and Authenticator class,you could write the method in your activity directly like (I'm not sure your Authenticate method works，only for the依賴錯誤）：

private  async void Authenticate()
    {
        string Nome_Usuario = "taniguchi.sales@ax4b.com";
        string clientId = "2b121ed5-9fe6-4ddf-bdea-9bbe8cd37bd0";
        string authority = "https://login.microsoftonline.com/ax4b.com";
        string returnUri = "https://ax4bdev.crm2.dynamics.com";
        string graphResourceUri = "https://ax4bdev.crm2.dynamics.com";
        var data = await Authenticate(authority, graphResourceUri, clientId, returnUri);

    }

    private async Task<AuthenticationResult> Authenticate(string authority, string resource, string clientId, string returnUri)
    {
        var authContext = new AuthenticationContext(authority);
        if (authContext.TokenCache.ReadItems().Count() > 0)
            authContext = new AuthenticationContext(authContext.TokenCache.ReadItems().First().Authority);
        var uri = new Uri(returnUri);

        var platformParams = new PlatformParameters(this);
        var authResult = await authContext.AcquireTokenAsync(resource, clientId, uri, platformParams);
        return authResult;
    }