Asp.net .NET 身份邮箱用户名更改

Update Dec 2017 comments 中提出了一些好的观点:

• 在确认新邮件时，最好为其设置一个单独的字段，以防用户输入错误的邮箱.等待新邮件确认，然后将其作为主要邮件.请参见下面Chris_u的详细回答.
• 此外，当该邮箱的帐户已经存在时，也可能会出现这种情况-确保您也判断了这一点，否则可能会有麻烦.

这是一个非常基本的解决方案，没有涵盖所有可能的组合，所以使用您的判断力，并确保您通读了 comments -其中提出了非常好的观点.

// get user object from the storage
var user = await userManager.FindByIdAsync(userId);

// change username and email
user.Username = "NewUsername";
user.Email = "New@email.com";

// Persiste the changes
await userManager.UpdateAsync(user);

// generage email confirmation code
var emailConfirmationCode = await userManager.GenerateEmailConfirmationTokenAsync(user.Id);

// generate url for page where you can confirm the email
var callbackurl= "http://example.com/ConfirmEmail";

// append userId and confirmation code as parameters to the url
callbackurl += String.Format("?userId={0}&code={1}", user.Id, HttpUtility.UrlEncode(emailConfirmationCode));

var htmlContent = String.Format(
        @"Thank you for updating your email. Please confirm the email by clicking this link: 
        <br><a href='{0}'>Confirm new email</a>",
        callbackurl);

// send email to the user with the confirmation link
await userManager.SendEmailAsync(user.Id, subject: "Email confirmation", body: htmlContent);



// then this is the action to confirm the email on the user
// link in the email should be pointing here
public async Task<ActionResult> ConfirmEmail(string userId, string code)
{
    var confirmResult = await userManager.ConfirmEmailAsync(userId, code);

    return RedirectToAction("Index");
}