In the MVC project template in VS2013 Update 2, there should be a file called `App_Start/IdentityConfig.cs`. In it you should find the class `ApplicationUserManager` and a static factory method called `Create()`. That&#39;s where the user manager class is configured, including the server-side validation rules for passwords are defined. For example:

    manager.PasswordValidator = new PasswordValidator
    {
        RequiredLength = 6,
        RequireNonLetterOrDigit = true,
        RequireDigit = true,
        RequireLowercase = true,
        RequireUppercase = true,
    };



In addition to Anthony Chu&#39;s answer, 

You may also need to change it in Models folder &gt; AccountViewModel.cs &gt; class RegisterViewModel (as well as class ResetPasswordViewModel)

Change &quot;MinimumLength = 6&quot;  (need to scroll right)

     [Required]
     [StringLength(100, ErrorMessage = &quot;The {0} must be at least {2} characters long.&quot;, MinimumLength = 6)]
     [DataType(DataType.Password)]
     [Display(Name = &quot;Password&quot;)]
     public string Password { get; set; }

I have a `List` of cards called _deck:

     private List&lt;String&gt; _deck = new List&lt;String&gt; {&quot;2h&quot;, &quot;3h&quot;, &quot;4h&quot;, ... }

And then I want to remove a card from the `List` and save into a variable. I&#39;m trying to do:

     String p1FirstCard = _deck.RemoveAt(0);

but I&#39;m getting the error 

&gt; Cannot convert type void to String

In C# `List` is there something like push/pop but which does that at the &quot;head&quot; or &quot;start&quot; of the `List`?  (Push/pop works at the &quot;tail&quot; or &quot;end&quot; of the list.)

If not, how should I do remove the first element but save it in a variable?

How to &quot;Dequeue&quot; Element from a List?

Which is best way to pause the console in C++ programs?
    
 0. using `cin.get()`
 0. or using `system(&quot;pause&quot;)`
 0. or using C functions like `getch()` or `getchar()`?

Is it true that use of `system(&quot;pause&quot;)` leads to non portable code and can&#39;t work in UNIX?
    
Is cin.get() is better to use to pause console? 

Pause Console in C++ program

How To Change Password Validation in ASP.Net MVC5 Identity 2 ?

Thanks

How To Change Password Validation in ASP.Net MVC Identity 2?

<p>How To Change Password Validation in ASP.Net MVC5 Identity 2 ?</p>
<p>Thanks</p>


I am unable to edit any files in a project in Visual Studio 2013.  It only happens in one project.  If I open a different project I am able to type fine, but once I go back into the problem project I am unable to type in the editor windows.  Not sure if it matters but the project that is giving me issues we are using SVN on.  The other projects are just local ones on the machine.  I have restarted Visual Stuido, restarted the computer and still am unable to edit the files.  Any ideas?

Unable to type in Visual Studio

I created a ViewModel(`UserModel`) that implement `IUser&lt;int&gt;` (for customizing ASP.NET Identity 2.0)&lt;br /&gt;

    public class UserModel : IUser&lt;int&gt;
    {
        public int Id { get; set; }
    
        public string SecurityStamp { get; set; }
    
        [Display(Name = &quot;Name&quot;)]
        public string FirstName { get; set; }
    
        [Display(Name = &quot;Last Name&quot;)]
        public string LastName { get; set; }
    
        public string FullName { get; set; }
    
        [Display(Name = &quot;Username&quot;)]
        public string UserName { get; set; }
    
        [DataType(DataType.Password)]
        [Display(Name = &quot;Password&quot;)]
        public string Password { get; set; }
    
        [Display(Name = &quot;E-Mail&quot;)]
        public string Email { get; set; }
    
        [Display(Name = &quot;Photo&quot;)]
        public string PhotoPath { get; set; }
    
        public List&lt;Claim&gt; Claims { get; set; }
    
        [IgnoreMapping]
        public List&lt;CommentModel&gt; Comments { get; set; }
    }

Everything is well, but `GenerateUserIdentityAsync` method.&lt;br /&gt;
The following code is my `GenerateUserIdentityAsync` in UserModel:

    public async Task&lt;ClaimsIdentity&gt; GenerateUserIdentityAsync(UserManager&lt;UserModel, int&gt; manager)
    {
        this.SecurityStamp = Guid.NewGuid().ToString();
        this.Claims = new List&lt;Claim&gt;();
        
        ClaimsIdentity userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);//Exception : Value cannot be null. Parameter name: value
    
        return userIdentity;
    }

An exception has occurred in `CreateIdentityAsync` method with the following stack trace

    ArgumentNullException: Value cannot be null.
    Parameter name: value]
       System.Security.Claims.Claim..ctor(String type, String value, String valueType, String issuer, String originalIssuer, ClaimsIdentity subject, String propertyKey, String propertyValue) +10798181
       System.Security.Claims.Claim..ctor(String type, String value) +34
       Microsoft.AspNet.Identity.&lt;CreateAsync&gt;d__0.MoveNext() +1458
       System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
       System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
       System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +24
       Smartiz.UI.Models.&lt;GenerateUserIdentityAsync&gt;d__2.MoveNext() in e:\Works\Smartiz\Smartiz.UI\Models\UserModels.cs:215
       System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
       System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
       System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +24
       Smartiz.UI.Controllers.&lt;SignInAsync&gt;d__58.MoveNext() in e:\Works\Smartiz\Smartiz.UI\Controllers\AccountController.cs:448
       System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
       System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
       System.Runtime.CompilerServices.TaskAwaiter.GetResult() +21
       Smartiz.UI.Controllers.&lt;ExternalLoginCallback&gt;d__3c.MoveNext() in e:\Works\Smartiz\Smartiz.UI\Controllers\AccountController.cs:315
       System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
       System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
       System.Runtime.CompilerServices.TaskAwaiter.GetResult() +21
       System.Threading.Tasks.TaskHelpersExtensions.ThrowIfFaulted(Task task) +61
       System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult) +114
       System.Web.Mvc.Async.&lt;&gt;c__DisplayClass37.&lt;BeginInvokeAsynchronousActionMethod&gt;b__36(IAsyncResult asyncResult) +66
       System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +47
       System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +136
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +102
       System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +49
       System.Web.Mvc.Async.AsyncInvocationWithFilters.&lt;InvokeActionMethodFilterAsynchronouslyRecursive&gt;b__3d() +117
       System.Web.Mvc.Async.&lt;&gt;c__DisplayClass46.&lt;InvokeActionMethodFilterAsynchronouslyRecursive&gt;b__3f() +323
       System.Web.Mvc.Async.&lt;&gt;c__DisplayClass33.&lt;BeginInvokeActionMethodWithFilters&gt;b__32(IAsyncResult asyncResult) +44
       System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +47
       System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +136
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +102
       System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +50
       System.Web.Mvc.Async.&lt;&gt;c__DisplayClass2b.&lt;BeginInvokeAction&gt;b__1c() +72
       System.Web.Mvc.Async.&lt;&gt;c__DisplayClass21.&lt;BeginInvokeAction&gt;b__1e(IAsyncResult asyncResult) +185
       System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +42
       System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56
       System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +40
       System.Web.Mvc.Controller.&lt;BeginExecuteCore&gt;b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +34
       System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +70
       System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +139
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +59
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +40
       System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +44
       System.Web.Mvc.Controller.&lt;BeginExecute&gt;b__15(IAsyncResult asyncResult, Controller controller) +39
       System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +62
       System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +139
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +59
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +40
       System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +39
       System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +39
       System.Web.Mvc.MvcHandler.&lt;BeginProcessRequest&gt;b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +39
       System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +70
       System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +139
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +59
       System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +40
       System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +40
       System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +38
       System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9651188
       System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp; completedSynchronously) +155

Could you please guide me where my wrong is ?

Value cannot be null. Parameter name: value, CreateIdentityAsync?

I started getting this error recently when trying to login using twitter- any idea why?

    Stack Trace: 
    
    
    [AuthenticationException: The remote certificate is invalid according to the validation procedure.]
       System.Net.TlsStream.EndWrite(IAsyncResult asyncResult) +230
       System.Net.PooledStream.EndWrite(IAsyncResult asyncResult) +13
       System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar) +123
    
    [WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.]
       System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) +6432446
       System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) +64



Owin Twitter login - the remote certificate is invalid according to the validation procedure

I am trying to trigger an action method for onchange event for dropdownlist, how can I do this without using jquery onchange.

    @Html.DropDownList(&quot;Sortby&quot;, 
                       new SelectListItem[] 
                       { 
                           new SelectListItem() { Text = &quot;Newest to Oldest&quot;, Value = &quot;0&quot; }, 
                           new SelectListItem() { Text = &quot;Oldest to Newest&quot;, Value = &quot;1&quot; }})

Thanks


onchange event for html.dropdownlist

I am new to EF so here goes.I have a class which contains the following

    public class EmailTemplate
    {
        public Guid Id { get; set; }

        [MaxLength(2000)]
        public string Html { get; set; }
    }

Here is my mapping class

    class EmailMapper : EntityTypeConfiguration&lt;EmailTemplate&gt;
        {
            public EmailMapper()
            {
                ToTable(&quot;EmailTemplate&quot;);

                HasKey(c =&gt; c.Id);
                Property(c =&gt; c.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
                Property(c =&gt; c.Id).IsRequired();
            }
        }

I am trying to call `DbContext.SaveChanges()`, but I get the following error :

&gt; Exception Details: System.Data.SqlClient.SqlException: Cannot insert the value NULL into column &#39;Id&#39;, table &#39;AutoSendConnection.dbo.EmailTemplates&#39;; column does not allow nulls. INSERT fails.

What am i doing wrong? Why won&#39;t EF auto create a unique GUID?

Entity Framework auto generate GUID

Does anyone know how to enable a user to change username/email with ASP.NET identity with email confirmation? There&#39;s plenty of examples on how to change the password but I can&#39;t find anything on this.

.NET Identity Email/Username change

The default Identity provider provided in ASP.NET 5 has very strict password rules by default, requiring a lower case character, an upper case character, a non-alphanumeric character, and a number. I am looking for a way to change the password requirements for the provider.

Previously in ASP.NET 4, the provider could be configured via the Web.config XML file, as [previously answered](https://stackoverflow.com/questions/678454/how-do-i-define-the-password-rules-for-the-asp-net-membership-provider). However ASP.NET 5 uses the new code based configuration pattern and it is unclear how to configure the identity.

How can I change the password requirements for my application?

How do I define the password rules for Identity in ASP.NET 5 MVC 6 (vNext)?

In our `Startup` class, I have configured the following auth server options:

    OAuthAuthorizationServerOptions OAuthServerOptions = new OAuthAuthorizationServerOptions()
    {
        AllowInsecureHttp = true,
        TokenEndpointPath = new PathString(&quot;/api/v1/token&quot;),
        AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
        Provider = new SimpleAuthorizationServerProvider()
    };

After this, which option are we supposed to use to actually enable bearer authentication?  There seem to be two variations on the Internet.

**Option 1:**

    app.UseOAuthAuthorizationServer(OAuthServerOptions);
    app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());

**Option 2:**

    app.UseOAuthBearerTokens(OAuthServerOptions);

I have tested them both and the results are the same.

What are the difference between these options?  When are we supposed to use which?

UseOAuthBearerTokens vs UseOAuthBearerAuthentication

I&#39;m using MVC5 Identity 2.0 for users to log into my website, where the authentication details are stored in an SQL database. Asp.net Identity has been implemented in a standard way as can be found in many online tutorials.

The ApplicationUser class in IdentityModels has been extended to include some custom properties, such as an integer OrganizationId. The idea is that many users can be created and assigned to a common Organization for database relationship purposes.

    public class ApplicationUser : IdentityUser
        {
            public async Task&lt;ClaimsIdentity&gt; GenerateUserIdentityAsync(UserManager&lt;ApplicationUser&gt; manager)
            {
                // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
                var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
                // Add custom user claims here
                return userIdentity;
            }
    
            //Extended Properties
            public DateTime? BirthDate { get; set; }
            public long? OrganizationId { get; set; }
    
            //Key Mappings
            [ForeignKey(&quot;OrganizationId&quot;)]
            public virtual Organization Organization { get; set; }
        }

How can I retrieve the OrganizationId property of the currently logged in user from within a controller? 
Is this available via a method once a user is logged in or do I always have the retrieve the OrganizationId from the database, based on the UserId, every time a controller method executes?

Reading around on the web I have seen I need to use the following to get the logged in UserId etc.

    using Microsoft.AspNet.Identity;
    ...
    User.Identity.GetUserId();

However, OrganizationId is not a property available in User.Identity. Do I need to extend User.Identity to include the OrganizationId property? If so, how do I go about this.

The reason I need the OrganizationId so often is that many table queries are reliant on the OrganizationId to retrieve data relevant to the Organization that&#39;s associated to the logged in user.

How to extend available properties of User.Identity

I&#39;m using **Asp.Net-Identity-2** and I&#39;m trying to verify email verification code using the below method. But I am getting an **&quot;Invalid Token&quot;** error message. 

 - My Application&#39;s User Manager is like this:
    
        public class AppUserManager : UserManager&lt;AppUser&gt;
        {
            public AppUserManager(IUserStore&lt;AppUser&gt; store) : base(store) { }

            public static AppUserManager Create(IdentityFactoryOptions&lt;AppUserManager&gt; options, IOwinContext context)
            {
                AppIdentityDbContext db = context.Get&lt;AppIdentityDbContext&gt;();
                AppUserManager manager = new AppUserManager(new UserStore&lt;AppUser&gt;(db));

                manager.PasswordValidator = new PasswordValidator { 
                    RequiredLength = 6,
                    RequireNonLetterOrDigit = false,
                    RequireDigit = false,
                    RequireLowercase = true,
                    RequireUppercase = true
                };

                manager.UserValidator = new UserValidator&lt;AppUser&gt;(manager)
                {
                    AllowOnlyAlphanumericUserNames = true,
                    RequireUniqueEmail = true
                };

                var dataProtectionProvider = options.DataProtectionProvider;

                //token life span is 3 hours
                if (dataProtectionProvider != null)
                {
                    manager.UserTokenProvider =
                       new DataProtectorTokenProvider&lt;AppUser&gt;
                          (dataProtectionProvider.Create(&quot;ConfirmationToken&quot;))
                       {
                           TokenLifespan = TimeSpan.FromHours(3)
                       };
                }

                manager.EmailService = new EmailService();

                return manager;
            } //Create
          } //class
        } //namespace


 - My Action to generate the token is (and even if I check the token here, I get &quot;Invalid token&quot; message):

        [AllowAnonymous]
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult ForgotPassword(string email)
        {
            if (ModelState.IsValid)
            {
                AppUser user = UserManager.FindByEmail(email);
                if (user == null || !(UserManager.IsEmailConfirmed(user.Id)))
                {
                    // Returning without warning anything wrong...
                    return View(&quot;../Home/Index&quot;);

                } //if

                string code = UserManager.GeneratePasswordResetToken(user.Id);
                string callbackUrl = Url.Action(&quot;ResetPassword&quot;, &quot;Admin&quot;, new { Id = user.Id, code = HttpUtility.UrlEncode(code) }, protocol: Request.Url.Scheme);

                UserManager.SendEmail(user.Id, &quot;Reset password Link&quot;, &quot;Use the following  link to reset your password: &lt;a href=\&quot;&quot; + callbackUrl + &quot;\&quot;&gt;link&lt;/a&gt;&quot;);

                //This 2 lines I use tho debugger propose. The result is: &quot;Invalid token&quot; (???)
                IdentityResult result;
                result = UserManager.ConfirmEmail(user.Id, code);
            }

            // If we got this far, something failed, redisplay form
            return View();
            
        } //ForgotPassword

 - My Action to check the token is (here, I always get &quot;Invalid Token&quot; when I check the result):

        [AllowAnonymous]
        public async Task&lt;ActionResult&gt; ResetPassword(string id, string code)
        {

            if (id == null || code == null)
            {
                return View(&quot;Error&quot;, new string[] { &quot;Invalid params to reset password.&quot; });
            }
            
            IdentityResult result;
            
            try
            {
                result = await UserManager.ConfirmEmailAsync(id, code);
            }
            catch (InvalidOperationException ioe)
            {
                // ConfirmEmailAsync throws when the id is not found.
                return View(&quot;Error&quot;, new string[] { &quot;Error to reset password:&lt;br/&gt;&lt;br/&gt;&lt;li&gt;&quot; + ioe.Message + &quot;&lt;/li&gt;&quot; });
            }

            if (result.Succeeded)
            {
                AppUser objUser = await UserManager.FindByIdAsync(id);
                ResetPasswordModel model = new ResetPasswordModel();
                
                model.Id = objUser.Id;
                model.Name = objUser.UserName;
                model.Email = objUser.Email;

                return View(model);
            }

            // If we got this far, something failed.
            string strErrorMsg = &quot;&quot;;
            foreach(string strError in result.Errors)
            {
                strErrorMsg += &quot;&lt;li&gt;&quot; + strError + &quot;&lt;/li&gt;&quot;;
            } //foreach

            return View(&quot;Error&quot;, new string[] { strErrorMsg });

        } //ForgotPasswordConfirmation


I don&#39;t know what could be missing or what&#39;s wrong...

Asp.NET Identity 2 giving &quot;Invalid Token&quot; error

I need ability to change password for user by admin. So, admin should not enter a current password of user, he should have ability to set a new password. I look at ChangePasswordAsync method, but this method requires to enter old password. So, this method is not appropriate for this task. Therefore I have made it by the following way:

        [HttpPost]
        public async Task&lt;ActionResult&gt; ChangePassword(ViewModels.Admin.ChangePasswordViewModel model)
        {
            var userManager = HttpContext.GetOwinContext().GetUserManager&lt;ApplicationUserManager&gt;();
            var result = await userManager.RemovePasswordAsync(model.UserId);
            if (result.Succeeded)
            {
                result = await userManager.AddPasswordAsync(model.UserId, model.Password);
                if (result.Succeeded)
                {
                    return RedirectToAction(&quot;UserList&quot;);
                }
                else
                {
                    ModelState.AddModelError(&quot;&quot;, result.Errors.FirstOrDefault());
                }
            }
            else
            {
                ModelState.AddModelError(&quot;&quot;, result.Errors.FirstOrDefault());
            }
            return View(model);
        }

it works, but theoretically we can receive error on AddPasswordAsync method. So, old password will be removed but new is not set. It&#39;s not good. Any way to do it in &quot;one transaction&quot;?
PS. I seen ResetPasswordAsync method with reset token, seems, it&#39;s more safe (because can&#39;t be unstable situation with user) but in any case, it does by 2 actions. 

Content Type	Original Author	Original Content on Stackoverflow
Question	Nazmul Hossain	View Question on Stackoverflow
Solution 1 - asp.net Mvc	Anthony Chu	View Answer on Stackoverflow
Solution 2 - asp.net Mvc	nanonerd	View Answer on Stackoverflow

How To Change Password Validation in ASP.Net MVC Identity 2?

asp.net Mvc Problem Overview

asp.net Mvc Solutions

Solution 1 - asp.net Mvc

Solution 2 - asp.net Mvc

Pause Console in C++ program

How to "Dequeue" Element from a List?

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