如何以 xamarin 形式从 Microsoft 注销？

Question

我正在处理 xamarin 表单。登录是通过 Microsoft 使用 AuthenticationContext。单击登录按钮后，它将重定向到 Microsoft 登录页面。登录工作正常。一旦我从用户登录后点击注销按钮，用户应该注销，如何注销没有点击按钮？

使用以下代码我可以登录

public Task<AuthenticationResult> Authenticate(string authority, string resource, string clientId, string returnUri)
    {
        try
        {
            var authContext = new AuthenticationContext(authority);
            if (authContext.TokenCache.ReadItems().Any())
            {
                authContext = new AuthenticationContext(authContext.TokenCache.ReadItems().First().Authority);
            }


            var uri = new Uri(returnUri);
            var platformParams = new PlatformParameters((Activity)Forms.Context);
            var authResult = authContext.AcquireTokenAsync(resource, clientId, uri, platformParams);
            return authResult;
        }
        catch (Exception ex)
        {
            Crashes.TrackError(ex);
            return null;
        }
    }

请帮助我如何退出？

Answer 1

你Logout通过清空Tokencache，然后退出应用，或者将App MainPage设置为Login Page。

对于 iOS：

public async Task LogoutAsync()
        {
            var authContext = new AuthenticationContext(authority);
            if (authContext.TokenCache.ReadItems().Any())
            {
                authContext.TokenCache.Clear();
            }

            //In addition to clearing the token cache, you should also clear the cookies in the web view.
            //Otherwise, the session cookies come into play and that is why you are seeing the web view come up and disappear immediately.
            foreach (var cookie in NSHttpCookieStorage.SharedStorage.Cookies)
            {
                NSHttpCookieStorage.SharedStorage.DeleteCookie(cookie);
            }
        }

Android也一样，只是清除cookie的方法不同：

        CookieManager.Instance.RemoveAllCookie();

Answer 2

清除访问令牌以注销

Public static void Logout()
{
  AuthenticationContext authContext = new 
  AuthenticationContext(AuthenticationConstants.Authority);
  TokenCache tokenCache = ac.TokenCache;
  tokenCache.Clear();
}

在返回登录页面之前调用此方法。我的意思是在返回登录页面之前，您必须清除访问令牌

Like example
private void NavigateToLoginViewController()
{ 
    // call the above logout method here 
   .
   .
   .
}