c# - ExternalLoginInfo 电子邮件在 Microsoft 和 Facebook oauth2、MVC C# 中始终为 null？

Question

我正在为 ExternalLoginCallback
使用以下代码 在 google 中一切正常。但在 Facebook 和 Microsoft 中，loginInfo.Email 始终为空。 以下代码有什么问题？

    [AllowAnonymous]
public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
{
    ExternalLoginInfo loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
    if (loginInfo == null)
    {
        return RedirectToAction("Login");
    }

    // loginInfo.Email is always null, so FindByEmailAsync throws an exception
    UserIdentityModel user = await UserManager.FindByEmailAsync(loginInfo.Email); 

    if (user != null)
    {
        await SignInAsync(user, false);
        return RedirectToLocal(returnUrl);
    }

    // If the user does not have an account, then prompt the user to create an account
    ViewBag.ReturnUrl = returnUrl;
    ViewBag.LoginProvider = loginInfo.Login.LoginProvider;
    return View("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel
    {
        UserName = loginInfo.DefaultUserName,
        Email = loginInfo.Email
    });
}

我正在使用以下软件包:

<package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Facebook" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Google" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.MicrosoftAccount" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.OAuth" version="3.0.1" targetFramework="net45" />
  <package id="Microsoft.Owin.Security.Twitter" version="3.0.1" targetFramework="net45" />

Answer 1

我找到了解决方案，我们必须在 Startup.Auth.cs 文件中使用 Facebook 和 Microsoft 如下:

// Facebook
app.UseFacebookAuthentication(new FacebookAuthenticationOptions
{
    AppId = "---",
    AppSecret = "---",
    Scope = { "email" }
});

// Microsoft
app.UseMicrosoftAccountAuthentication(new MicrosoftAccountAuthenticationOptions()
{
    ClientId = "---",
    ClientSecret = "---",
    Scope = { "wl.basic", "wl.emails" }
});