I have isAdmin boolean property which I am checking user logged in as user or admin.(我有isAdmin布尔属性，正在检查以用户或admin身份登录的用户。)
Backend is .net core 2.2, db - Postgre.(后端是.net core 2.2，db-Postgre。) Everything works fine but after refresh I lose isAdmin value.(一切正常，但是刷新后我失去了isAdmin的值。) I have conditional show hide dropdown which is available only for admin roles.(我有条件的show hide下拉列表，仅适用于管理员角色。) How don't lose data after refreshing?(刷新后如何不丢失数据？) PS How to add logic also to my guard for isAdmin property?(PS如何也为isAdmin属性添加逻辑到我的后卫？) My component looks like:(我的组件看起来像：)
model: any = {};
constructor(public authService: AuthService, private alertify: AlertifyService, private router:
Router) { }
ngOnInit() {
}
login() {
this.authService.login(this.model).subscribe(next => {
this.model.isAdmin = true;
this.alertify.success('Logged in as Admin')
}, error => {
this.alertify.error(error)
}, () => {
this.router.navigate(['/projects'])
})
}
loginAsUser() {
this.authService.loginAsUser(this.model).subscribe(next => {
this.model.isAdmin = false;
this.alertify.success('Logged in as User')
}, error => {
this.alertify.error(error)
}, () => {
this.router.navigate(['/home'])
})
}
loggedIn() {
return this.authService.loggedIn();
}
logout() {
localStorage.removeItem('token');
this.alertify.message('logged out');
this.router.navigate(['/home'])
}
My html looks like:(我的html看起来像：)
<nav class="navbar navbar-expand-md navbar-light fixed-top bg-light">
<div class="container">
<a class="navbar-brand" [routerLink]="['/home']">
<img [src]="iteraLogo" alt="Itera">
</a>
<div *ngIf="loggedIn()" class="dropdown" dropdown [hidden]="!model.isAdmin">
<a class="dropdown-toggle" dropdownToggle>
<strong class="text-primary">Admin Panel</strong>
</a>
<div class="dropdown-menu mt-4" *dropdownMenu>
<ul class="navbar-nav">
<li class="nav-item" routerLinkActive="router-link-active">
<a class="nav-link" [routerLink]="['/projects']">Projects</a>
</li>
<li class="nav-item" routerLinkActive="router-link-active">
<a class="nav-link" [routerLink]="['/hypervisors']">Hypervisors</a>
</li>
<li class="nav-item" routerLinkActive="router-link-active">
<a class="nav-link" [routerLink]="['/management']">Management</a>
</li>
<li class="nav-item" routerLinkActive="router-link-active">
<a class="nav-link" [routerLink]="['/users']">Users</a>
</li>
<li class="nav-item" routerLinkActive="router-link-active">
<a class="nav-link" [routerLink]="['/user-projects']">Users Projects</a>
</li>
</ul>
</div>
</div>
<ul class="navbar-nav mr-auto">
<li class="nav-item" routerLinkActive="router-link-active">
<a class="nav-link" [routerLink]="['/test']">About</a>
</li>
</ul>
<div *ngIf="loggedIn()" class="dropdown" dropdown>
<a class="dropdown-toggle" dropdownToggle>
Welcome <strong>{{ authService.decodedToken?.unique_name | titlecase }}</strong>
</a>
<div class="dropdown-menu mt-3" *dropdownMenu>
<a class="dropdown-item text-primary" [routerLink]="['/projects/',
authService.decodedToken?.nameid ]"><i class="fa fa-archive"> My Projects</i></a>
<div class="dropdown-divider"></div>
<a class="dropdown-item text-danger" (click)="logout()"><i class="fa fa-sign-
out"> Logout</i></a>
</div>
</div>
<form *ngIf="!loggedIn()" #loginForm="ngForm" class="form-inline my-2 my-lg-0">
<div class="input-group">
<div class="input-group-prepend">
<div class="input-group-text">
<i class="fa fa-user-circle-o text-primary" aria-hidden="true"></i>
</div>
</div>
<input class="form-control" placeholder="Username" name="username" required
[(ngModel)]="model.username" />
</div>
<div class="input-group">
<div class="input-group-prepend">
<div class="input-group-text">
<i class="fa fa-unlock text-danger" aria-hidden="true"></i>
</div>
</div>
<input class="form-control" placeholder="Password" name="password" required type="password"
[(ngModel)]="model.password" />
</div>
<div>
<button [disabled]="!loginForm.valid" type="submit" (click)="loginAsUser()" class="btn btn-primary my-2 my-sm-0">
<i class="fa fa-user-circle" aria-hidden="true"></i> User
</button>
<button [disabled]="!loginForm.valid" type="submit" (click)="login()" class="btn btn-success
my-2 my-sm-0">
<i class="fa fa-user-secret" aria-hidden="true"></i> Admin
</button>
</div>
</form>
</div>
</nav>
My guard looks like:(我的守卫看起来像：)
canActivate(): boolean {
if(this.authService.loggedIn()) {
return true
}
this.alertify.error('You have no access to see this page!!!');
this.router.navigate(['/home']);
return false;
}
ask by Arzu Suleymanov translate from so
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