UserManager.CreateAsync Method (TUser, String) doesn't mention about errors.
In controller, I jsut edit something like:
public async Task<ObjectResult> Register(RegisterViewModel model, string returnUrl = null)
{
IDictionary<string, object> value = new Dictionary<string, object>();
value["Success"] = false;
value["ReturnUrl"] = returnUrl;
if (ModelState.IsValid)
{
var user = new ApplicationUser { Id = Guid.NewGuid().ToString(), UserName = model.Email, Email = model.Email };
var result = await _userManager.CreateAsync(user, model.Password);
if (result.Succeeded)
{
await _signInManager.SignInAsync(user, isPersistent: false);
value["Success"] = true;
}
else
{
value["ErrorMessage"] = result.Errors;
}
}
return new ObjectResult(value);
}
In client:
$scope.registerForm_submit = function ($event, account) {
$event.preventDefault();
if (registerForm.isValid(account)) {
// registerForm.collectData returns new FormData() which contains
// email, password, confirmpassword, agreement, returnurl...
let formData = registerForm.collectData(account),
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function () {
if (xhttp.readyState === XMLHttpRequest.DONE) {
let data = JSON.parse(xhttp.responseText);
if (data['Success']) {
window.location = '/'
} else {
if (data['ErrorMessage'][0]['code'] === 'DuplicateUserName') {
let li = angular.element('<li/>').text(`Email ${account['email']} already exists.`);
angular.element('div[data-valmsg-summary=true] ul').html(li);
}
}
}
}
xhttp.open('POST', '/account/register');
xhttp.send(formData);
}
};
I've tried to register new account with an existing email and got the code:
data['ErrorMessage'][0]['code'] === 'DuplicateUserName'
My question: how to check other cases?
The error codes defined in ASP.NET Identity are found at https://aspnetidentity.codeplex.com/SourceControl/latest#src/Microsoft.AspNet.Identity.Core/Resources.Designer.cs - I've extracted them out to this list:
ASP.NET Core Identity has these codes defined:
So, it's possible that not all of the former error codes will actually show up in an IdentityResult. I don't use either, so this is just what I gather from skimming the available source code. Caveat emptor...
Seems like this should be documented somewhere...
I like to have strings of this nature defined in one place, so I typically do something like:
public class IdentityErrorCodes
{
public const string DefaultError = "DefaultError";
public const string ConcurrencyFailure = "ConcurrencyFailure";
public const string PasswordMismatch = "PasswordMismatch";
public const string InvalidToken = "InvalidToken";
public const string LoginAlreadyAssociated = "LoginAlreadyAssociated";
public const string InvalidUserName = "InvalidUserName";
public const string InvalidEmail = "InvalidEmail";
public const string DuplicateUserName = "DuplicateUserName";
public const string DuplicateEmail = "DuplicateEmail";
public const string InvalidRoleName = "InvalidRoleName";
public const string DuplicateRoleName = "DuplicateRoleName";
public const string UserAlreadyHasPassword = "UserAlreadyHasPassword";
public const string UserLockoutNotEnabled = "UserLockoutNotEnabled";
public const string UserAlreadyInRole = "UserAlreadyInRole";
public const string UserNotInRole = "UserNotInRole";
public const string PasswordTooShort = "PasswordTooShort";
public const string PasswordRequiresNonAlphanumeric = "PasswordRequiresNonAlphanumeric";
public const string PasswordRequiresDigit = "PasswordRequiresDigit";
public const string PasswordRequiresLower = "PasswordRequiresLower";
public const string PasswordRequiresUpper = "PasswordRequiresUpper";
public static string[] All = {
DefaultError,
ConcurrencyFailure,
PasswordMismatch,
InvalidToken,
LoginAlreadyAssociated,
InvalidUserName,
InvalidEmail,
DuplicateUserName,
DuplicateEmail,
InvalidRoleName,
DuplicateRoleName,
UserAlreadyHasPassword,
UserLockoutNotEnabled,
UserAlreadyInRole,
UserNotInRole,
PasswordTooShort,
PasswordRequiresNonAlphanumeric,
PasswordRequiresDigit,
PasswordRequiresLower,
PasswordRequiresUpper
};
}
This lets you be consistent in the keys you're using as lookups, and the last field, All
, gives you an array you can enumerate through, if necessary.
Using your code, you can do this:
if(data['ErrorMessage'][0]['code'] == IdentityErrorCodes.DuplicateUserName)
{
}
And so on.
For ASP.NET Core you can find the different error types in the IdentityErrorDescriber
class under the namespace Microsoft.AspNetCore.Identity
.
As you can see, the error codes are generated via nameof()
, e.g:
Code = nameof(DuplicateUserName)
So you could also use that for your cases:
data['ErrorMessage'][0]['code'] == nameof(IdentityErrorDescriber.DuplicateUserName)
This way you don't have to curate a list of error codes as suggested in another answer to your question.
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