ExternalLoginInfo电子邮件总是空的微软和Facebook的oauth2，MVC C＃？ [英] ExternalLoginInfo Email is always null in Microsoft and Facebook oauth2, MVC C#?

问题描述

我用下面的code为 ExternalLoginCallback 结果
在谷歌一切正常。但在的Facebook 和微软 loginInfo.Email 总是空。
这有什么错如下code？

  [使用AllowAnonymous]
公共异步任务＆LT;＆的ActionResult GT; ExternalLoginCallback（字符串RETURNURL）
{
    ExternalLoginInfo LOGININFO =等待AuthenticationManager.GetExternalLoginInfoAsync（）;
    如果（LOGININFO == NULL）
    {
        返回RedirectToAction（登录）;
    }    // loginInfo.Email总是空，所以FindByEmailAsync抛出一个异常
    UserIdentityModel用户=等待UserManager.FindByEmailAsync（loginInfo.Email）;    如果（用户！= NULL）
    {
        等待SignInAsync（用户，FALSE）;
        返回RedirectToLocal（RETURNURL）;
    }    //如果用户没有一个帐户，然后提示用户创建一个帐户
    ViewBag.ReturnUrl = RETURNURL;
    ViewBag.LoginProvider = loginInfo.Login.LoginProvider;
    返回视图（ExternalLoginConfirmation，新ExternalLoginConfirmationViewModel
    {
        用户名= loginInfo.DefaultUserName，
        电子邮件= loginInfo.Email
    }）;
}
 

我用下面的软件包：

 ＆LT;包ID =Microsoft.Owin版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Host.SystemWeb版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security.Cookies版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security.Facebook版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security.Google版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security.MicrosoftAccount版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security.OAuth版本=3.0.1targetFramework =net45/＆GT;
  ＆LT;包ID =Microsoft.Owin.Security.Twitter版本=3.0.1targetFramework =net45/＆GT;
 

解决方案

我找到了解决办法，我们必须使用的Facebook 和微软在 Startup.Auth.cs 文件：

  //的Facebook
app.UseFacebookAuthentication（新FacebookAuthenticationOptions
{
    的AppId =---，
    AppSecret =---，
    SCOPE = {电子邮件}
}）;//微软
app.UseMicrosoftAccountAuthentication（新MicrosoftAccountAuthenticationOptions（）
{
    客户端Id =---，
    ClientSecret =---，
    SCOPE = {wl.basic，wl.emails}
}）;
 

I'm using the following code for ExternalLoginCallback
In google everything is OK. but in Facebook and Microsoft loginInfo.Email is always null. What's wrong with the following code?

    [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
    });
}

I'm using the following packages:

<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" />

解决方案

I found the solution, We have to use Facebook and Microsoft as the following in Startup.Auth.cs file:

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

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

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