![](/img/trans.png)
[英]unable to change an attribute value of one component from another component in angular
[英]Angular 5 - Unable to navigate from one component to another component
我正在开发 Angular 应用程序。 在那我有两个页面登录和主页。 登录提交按钮后,它应该导航到主页。 为此,我尝试了多种方法,但它没有导航到主页。 最后我在我的登录(app.component.html)文件中使用了<router-outlet></router-outlet>
。 所以主页显示在登录页面中。 我想在登录后导航主页。 下面是我当前的输出和代码
当我刷新http://localhost:4200/home
它显示如下错误
app.component.html(登录页面)
<div align="center">
<form (ngSubmit)="onLoginSubmit()" class="fullForm">
<div class="imgcontainer"></div>
<h2>PL Auth</h2>
<div class="container">
<form (ngSubmit)="generateOtpSubmit()" class="generateOtpForm">
<label> <b>Username: </b>
</label> <input type="text" placeholder="Enter Username" id="username"
[(ngModel)]=userName name="uname" required> <br> <br>
<label> <b>Password : </b>
</label> <input type="password" placeholder="Enter Password" id="password"
[(ngModel)]=password name="psw" required> <br> <br>
<button type="submit" class="otpButton">Generate OTP</button>
</form>
<br> <br> <label> <b>Enter OTP : </b>
</label> <input type="text" placeholder="Enter OTP" id="otp" [(ngModel)]=otp
name="otp" required> <br> <br>
<button type="submit" class="loginButton">Login</button>
</div>
<div>
<p style="color: red;">{{ loginStatus }}</p>
</div>
</form>
<router-outlet></router-outlet>
</div>
app.component.ts
import { Component, OnInit } from '@angular/core';
import { Location } from '@angular/common';
import { HomepageComponent } from './homepage/homepage.component';
import { Headers, Http, Response } from '@angular/http';
import { RouterModule, Routes } from '@angular/router';
import { HttpClient } from '@angular/common/http';
import { Directive } from '@angular/core';
//import { Router } from '@angular/router';
import { Router } from "@angular/router";
import { Text } from '@angular/compiler';
export const appRoutes: Routes = [
{path: 'home', component:HomepageComponent}
];
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
otpsubmitted = false;
loginSubmitted = false;
userName = '';
password = '';
otp ='';
userAuthCheck:Text;
checkOtp:Text;
authCheck ='';
loginStatus='';
ngOnInit() {
}
constructor(private http: Http,private httpClient: HttpClient,private route: Router ) { }
private generateOtp(){
this.http.post('http://localhost:8080/loginController/generateotp', {
userMail: this.userName
})
.subscribe(
res => {
console.log(res);
},
err => {
console.log("Error occured");
}
);
}
private logSubmit(){
this.http.post('http://localhost:8080/loginController/authUser', {
userMail: this.userName,
password: this.password,
otp: this.otp
})
.subscribe(
res => {
const printResp=res.json();
console.log(res);
//this.loginStatus=printResp.status;
if (printResp.status === 'true'){
this.loginStatus = '';
console.log('in the clickName');
this.route.navigateByUrl('/home');
//this.route.navigate(['home/']);
} else if(printResp.status === 'false') {
this.loginStatus = printResp.Data.errorMessage;
}
},
err => {
console.log("Error occured"+err);
}
);
}
generateOtpSubmit() {
this.otpsubmitted = true;
this.generateOtp();
}
onLoginSubmit(){
this.loginSubmitted = true;
this.logSubmit();
}
}
app-routing.module.ts
import {ApplicationComponent} from './application/application.component';
import {NavigationComponent} from './navigation/navigation.component';
import { HomepageComponent } from './homepage/homepage.component';
import {AppComponent} from './app.component';
import {NgModule} from '@angular/core';
import {RouterModule, Routes} from '@angular/router';
import { CommonModule } from '@angular/common';
const routes: Routes = [
{path: 'home', component: HomepageComponent},
{path: 'application', component: ApplicationComponent},
{path: 'navigation', component: NavigationComponent},
];
@NgModule({
imports: [CommonModule,RouterModule.forRoot(routes)],
exports: [RouterModule],
declarations: []
})
export class AppRoutingModule {}
app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { Router } from '@angular/router';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { HttpModule } from '@angular/http';
import { HttpClientModule } from '@angular/common/http';
import { HomepageComponent } from './homepage/homepage.component';
import { ApplicationComponent } from './application/application.component';
import { NavigationComponent } from './navigation/navigation.component';
import { SearchuserComponent } from './searchuser/searchuser.component';
@NgModule({
declarations: [
AppComponent,
HomepageComponent,
ApplicationComponent,
NavigationComponent,
SearchuserComponent
],
imports: [
BrowserModule,
FormsModule,
HttpClientModule,
HttpModule,
AppRoutingModule
],
bootstrap: [AppComponent]
})
export class AppModule { }
主页.component.html
<p>
homepage works!
</p>
索引.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CyberSecurityVw</title>
<base href="/">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" type="image/x-icon" href="favicon.ico">
</head>
<body>
<app-root></app-root>
</body>
</html>
主页.component.ts
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'app-homepage',
templateUrl: './homepage.component.html',
styleUrls: ['./homepage.component.css']
})
export class HomepageComponent implements OnInit {
constructor() { }
ngOnInit() {
}
}
只需使用
this.route.navigate(['/home']);
首先:您需要将登录表单移至名为 (login) 的新组件
第二:你的应用组件 html 应该只包含这一行
<router-outlet></router-outlet>
因为应用组件会像你的登陆页面一样,所以你不应该在上面添加登录表单
第三:你需要修改你的路由
import { HomepageComponent } from './homepage/homepage.component';
import { LoginComponent } from './login/login.component';
import { AppComponent } from './app.component';
import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { CommonModule } from '@angular/common';
const routes: Routes = [
{ path: '', redirectTo: 'home', pathMatch: 'full' },
{
path: 'home', component: HomepageComponent,
children: [
{ path: '', redirectTo: '/example', pathMatch: 'full' },
{
path: 'example', component: ExampleComponent
}
]
},
{ path: 'login', component: LoginComponent },
];
@NgModule({
imports: [CommonModule, RouterModule.forRoot(routes)],
exports: [RouterModule],
declarations: []
})
export class AppRoutingModule { }
- 会发生什么是当你输入你的网站 url 而没有任何路由时,它会导航到 home/example - 所以 home 组件应该包含你的网站设计模板,所以所有的子组件都将注入 home 组件并采用相同的模板设计
- 登录组件是独立的,因为你不需要它来采用相同的网站设计模板
第四:在你的主页html中添加这个
<div>
//your header
<header></header>
<div class="content">
<router-outlet></router-outlet>
</div>
// your footer
<footer></footer>
</div>
</div>
首先在您的主要组件中添加导入
import {Router } from '@angular/router';
在同一个文件中为构造函数和方法添加以下代码
constructor(private route: Router) {}
public Dashbord()
{
this.route.navigate(['/dashboard']);
}
在app-routing.module.ts
文件中添加dashboard
const routes: Routes =
[
{ path: '', pathMatch: 'full' ,component: TestComponent},
{ path: 'dashboard', component: DashboardComponent }
];
这是您的.html
文件代码
<button mat-button (click)="Dashbord()">Dashboard</button><br>
祝你好运。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.