add role in database in asp mvc identity - asp.net-mvc

Question

i need to when user regiter add in tabel AspNetRole add user id and role id .
but when i create a user show me this error .
how can i insert role in database ?
/*************************************************************************************************/
identityconfig :
public class ApplicationRoleManager : RoleManager<IdentityRole>
{
public ApplicationRoleManager(IRoleStore<IdentityRole, string> roleStore)
: base(roleStore)
{
}
public static ApplicationRoleManager Create(IdentityFactoryOptions<ApplicationRoleManager> options, IOwinContext context)
{
return new ApplicationRoleManager(new RoleStore<IdentityRole>(context.Get<ApplicationDbContext>()));
}
}
public static class SecurityRole
{
public const string Admin = "admin";
public const string Accounting = "accounting";
}
StartupAuth :
app.CreatePerOwinContext<ApplicationRoleManager>(ApplicationRoleManager.Create);
AccountController :
public ApplicationRoleManager RoleManager
{
get
{
return _roleManager ?? HttpContext.GetOwinContext().Get<ApplicationRoleManager>();
}
private set
{
_roleManager = value;
}
}
public async Task<ActionResult> Register(RegisterViewModel model, HttpPostedFileBase IamgeProfile)
{
if (ModelState.IsValid)
{
var user = new ApplicationUser { UserName = model.Username, Email = model.Email };
user.Name = model.Name;
user.Family = model.Family;
user.Address = model.Address;
user.BankName = model.BankName;
user.City = model.City;
user.Ostan = model.Ostan;
user.PhoneNumber = model.PhoneNumber;
user.HomeNumber = model.HomeNumber;
user.ShabaNo = model.ShabaNo;
user.PostaCode = model.PostaCode;
user.NationalCode = model.NationalCode;
if (IamgeProfile != null)
{
IamgeProfile = Request.Files[0];
var ext = System.IO.Path.GetExtension(IamgeProfile.FileName);
if (ext == ".jpeg" || ext == ".jpg" || ext == ".png")
{
string filename = model.Name + model.Family + model.NationalCode + ext;
IamgeProfile.SaveAs(Server.MapPath(#"~/Images/UserImageProfile/" + filename));
user.IamgeProfile = filename;
}
}
var result = await UserManager.CreateAsync(user, model.Password);
if (result.Succeeded)
{
await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);
await UserManager.AddToRoleAsync(user.Id, role: SecurityRole.Accounting);
var code = await UserManager.GenerateEmailConfirmationTokenAsync(user.Id);
var callbackUrl = Url.Action("ConfirmEmail", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
await UserManager.SendEmailAsync(user.Id, "Confirm your account", "Please confirm your account by clicking this link: link");
ViewBag.Link = callbackUrl;
return View("DisplayEmail");
}
AddErrors(result);
}
// If we got this far, something failed, redisplay form
return View(model);
}

Answer 1

To add a role into AspNetRoles you can do this in your Seed() or other startup method:
if (!context.Roles.Any(r => r.Name == "Admin"))
{
var store = new RoleStore<IdentityRole>(context);
var manager = new RoleManager<IdentityRole>(store);
var role = new IdentityRole { Name = "Admin" };
manager.Create(role);
}
https://msdn.microsoft.com/en-us/library/dn613057(v=vs.108).aspx