Creating Roles in Asp net Identity MVC 5

Question

There is very little documentation about using the new Asp net Identity Security Framework   I have pieced together what I could to try and create a new Role and add a User to it   I tried the following  Add role in ASP NET Identity  which looks like it may have gotten the info from this blog  building a simple to-do application with asp net identity and associating users with to-does  I have added the code to a Database Initializer that is run whenever the model changes  It fails on the RoleExists function with the following error       System InvalidOperationException occurred in mscorlib dll    The entity type IdentityRole is not part of the model for the current context    protected override void Seed  MyContext context        var UserManager   new UserManager lt ApplicationUser gt  new UserStore lt ApplicationUser gt  context         var RoleManager   new RoleManager lt IdentityRole gt  new RoleStore lt IdentityRole gt  context            Create Admin Role     string roleName    Admins       IdentityResult roleResult          Check to see if Role Exists  if not create it     if   RoleManager RoleExists roleName                 roleResult   RoleManager Create new IdentityRole roleName              Any help is appreciated

User · Answer

If you are using the default template that is created when you select a new ASP.net Web application and selected Individual User accounts as Authentication and trying to create users with Roles so here is the solution. In the Account Controller's Register method which is called using [HttpPost], add the following lines in if condition.

using Microsoft.AspNet.Identity.EntityFramework;

var user = new ApplicationUser { UserName = model.Email, Email = model.Email };

var result = await UserManager.CreateAsync(user, model.Password);

if (result.Succeeded)
{
  var roleStore = new RoleStore<IdentityRole>(new ApplicationDbContext());
  var roleManager = new RoleManager<IdentityRole>(roleStore);
  if(!await roleManager.RoleExistsAsync("YourRoleName"))
     await roleManager.CreateAsync(new IdentityRole("YourRoleName"));

  await UserManager.AddToRoleAsync(user.Id, "YourRoleName");
  await SignInManager.SignInAsync(user, isPersistent:false, rememberBrowser:false);
  return RedirectToAction("Index", "Home");
}

This will create first create a role in your database and then add the newly created user to this role.

User · Answer

Here we go   var roleManager   new RoleManager lt Microsoft AspNet Identity EntityFramework IdentityRole gt  new RoleStore lt IdentityRole gt  new ApplicationDbContext           if  roleManager RoleExists  ROLE NAME               var role   new Microsoft AspNet Identity EntityFramework IdentityRole          role Name    ROLE NAME         roleManager Create role

User · Answer

Verify you have following signature of your MyContext class  public class MyContext   IdentityDbContext lt MyUser gt   Or   public class MyContext   IdentityDbContext  The code is working for me  without any modification

User · Answer

Roles View Model  public class RoleViewModel       public string Id   get  set         Required AllowEmptyStrings   false        Display Name    RoleName        public string Name   get  set        Controller method       HttpPost      public async Task lt ActionResult gt  Create RoleViewModel roleViewModel               if  ModelState IsValid                      var role   new IdentityRole roleViewModel Name              var roleresult   await RoleManager CreateAsync role              if   roleresult Succeeded                              ModelState AddModelError     roleresult Errors First                    return View                            return RedirectToAction  some action                    return View

User · Answer

public static void createUserRole string roleName                if   System Web Security Roles RoleExists roleName                         System Web Security Roles CreateRole roleName

User · Answer

I wanted to share another solution for adding roles    lt h2 gt Create Role lt  h2 gt    using  Html BeginForm       Html AntiForgeryToken    Html ValidationSummary true   lt span class  label label-primary  gt Role name  lt  span gt   lt p gt       Html TextBox  RoleName   null  new    class    form-control input-lg      lt  p gt   lt input type  submit  value  Save  class  btn btn-primary    gt      Controller        HttpGet      public ActionResult AdminView                 return View                HttpPost      public ActionResult AdminView FormCollection collection                var roleManager   new RoleManager lt IdentityRole gt  new RoleStore lt IdentityRole gt  new ApplicationDbContext               if  roleManager RoleExists collection  RoleName       false                        Guid guid   Guid NewGuid                roleManager Create new IdentityRole     Id   guid ToString    Name   collection  RoleName                         return View

User · Answer

the method i Use for creating roles is below  assigning them to users in code is also listed  the below code does be in  configuration cs  in the migrations folder   string    roleNames      role1    role2    role3     var RoleManager   new RoleManager lt IdentityRole gt  new RoleStore lt IdentityRole gt  context                     IdentityResult roleResult                  foreach var roleName in roleNames                                        if  RoleManager RoleExists roleName                                                 roleResult   RoleManager Create new IdentityRole roleName                                                            var UserManager   new UserManager lt ApplicationUser gt  new UserStore lt ApplicationUser gt  context                    UserManager AddToRole  user    role1                    UserManager AddToRole  user    role2                    context SaveChanges

User · Answer

As an improvement on Peters code above you can use this      var roleManager   new RoleManager lt Microsoft AspNet Identity EntityFramework IdentityRole gt  new RoleStore lt IdentityRole gt  new ApplicationDbContext          if   roleManager RoleExists  Member                roleManager Create new IdentityRole  Member

User · Answer

Here is the complete article describing how to create role  modify roles  delete roles and manage roles using ASP NET Identity  This also contains User interface  controller methods etc  http   www dotnetfunda com articles show 2898 working-with-roles-in-aspnet-identity-for-mvc Hope this helpls Thanks

User · Answer

In ASP NET 5 rc1-final  I did following   Created ApplicationRoleManager  in similar manner as there is ApplicationUser created by template   public class ApplicationRoleManager   RoleManager lt IdentityRole gt        public ApplicationRoleManager          IRoleStore lt IdentityRole gt  store          IEnumerable lt IRoleValidator lt IdentityRole gt  gt  roleValidators          ILookupNormalizer keyNormalizer          IdentityErrorDescriber errors          ILogger lt RoleManager lt IdentityRole gt  gt  logger          IHttpContextAccessor contextAccessor            base store  roleValidators  keyNormalizer  errors  logger  contextAccessor                  To ConfigureServices in Startup cs  I added it as RoleManager  services       AddIdentity lt ApplicationUser  IdentityRole gt         AddRoleManager lt ApplicationRoleManager gt       For creating new Roles  call from Configure following   public static class RoleHelper       private static async Task EnsureRoleCreated RoleManager lt IdentityRole gt  roleManager  string roleName                if   await roleManager RoleExistsAsync roleName                         await roleManager CreateAsync new IdentityRole roleName                        public static async Task EnsureRolesCreated this RoleManager lt IdentityRole gt  roleManager                   add all roles  that should be in database  here         await EnsureRoleCreated roleManager   Developer             public async void Configure      RoleManager lt IdentityRole gt  roleManager                       await roleManager EnsureRolesCreated                 Now  the rules can be assigned to user  await  userManager AddToRoleAsync await  userManager FindByIdAsync User GetUserId      Developer      Or used in Authorize attribute   Authorize Roles    Developer    public class DeveloperController   Controller

User · Answer

My application was hanging on startup when I used Peter Stulinski  amp  Dave Gordon s code samples with EF 6 0  I changed   var roleManager   new RoleManager lt Microsoft AspNet Identity EntityFramework IdentityRole gt  new RoleStore lt IdentityRole gt  new ApplicationDbContext        to  var roleManager   new RoleManager lt Microsoft AspNet Identity EntityFramework IdentityRole gt  new RoleStore lt IdentityRole gt    context        Which makes sense when in the seed method you don t want instantiate another instance of the ApplicationDBContext  This might have been compounded by the fact that I had Database SetInitializer lt ApplicationDbContext gt  new ApplicationDbInitializer     in the constructor of ApplicationDbContext

[c#] Creating Roles in Asp.net Identity MVC 5

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