public async Task <IActionResult> ManagerClaims(ManagerClaimsViewModel vm)
        {
            var user = await _userManager.FindByIdAsync(vm.UserId);

            if (user == null)
            {
                return(RedirectToAction("Index"));
            }

            var claim = new IdentityUserClaim <string>
            {
                ClaimType  = vm.ClaimId,
                ClaimValue = vm.ClaimId
            };

            user.Claims.Add(claim);
            var result = await _userManager.UpdateAsync(user);

            if (result.Succeeded)
            {
                return(RedirectToAction("UpdateUser", new{ id = vm.UserId }));
            }
            ModelState.AddModelError(string.Empty, "编辑用户Claims时发生错误");
            return(View(vm));
        }
        public async Task <IActionResult> ManagerClaims(string id)
        {
            var user = await _userManager.Users.Where(x => x.Id == id)
                       .Include(x => x.Claims).SingleOrDefaultAsync();

            if (user == null)
            {
                return(RedirectToAction("Index"));
            }
            var list = ClaimTypes.AllClaimTypeList.Except(user.Claims.Select(x => x.ClaimType)).ToList();
            var vm   = new ManagerClaimsViewModel
            {
                UserId    = id,
                AllClaims = list
            };

            return(View(vm));
        }