How to Transfer Data to Routes in Angular 2?

Question

How to Transfer Data to Routes in Angular 2?

I have been working on a project with Angular 2 where I am utilizing ROUTER_DIRECTIVES to move between components.

There are currently two components involved, namely PagesComponent and DesignerComponent.

My goal is to navigate from PagesComponent to DesignerComponent.

Although the routing is working as expected, I am facing an issue where I need to pass the page Object to the designer component so it can load that specific page.

I attempted to use RouteParams but encountered a problem where the page object was returning as undefined.

Here is a snippet of my code:

pages.component.ts

import {Component, OnInit ,Input} from 'angular2/core';
import { GlobalObjectsService} from './../../shared/services/global/global.objects.service';
import { ROUTER_DIRECTIVES, RouteConfig } from 'angular2/router';
import { DesignerComponent } from './../../designer/designer.component';
import {RouteParams} from 'angular2/router';

@Component({
    selector: 'pages',    
    directives:[ROUTER_DIRECTIVES,],
    templateUrl: 'app/project-manager/pages/pages.component.html'
})
@RouteConfig([
  { path: '/',name: 'Designer',component: DesignerComponent }      
])

export class PagesComponent implements OnInit {
@Input() pages:any;
public selectedWorkspace:any;    
constructor(private globalObjectsService:GlobalObjectsService) {
    this.selectedWorkspace=this.globalObjectsService.selectedWorkspace;                    
}
ngOnInit() { }   
}

In the html, I am implementing the following:

<scrollable height="300" class="list-group" style="overflow-y: auto; width: auto; height: 200px;" *ngFor="#page of pages">
    {{page.name}}<a [routerLink]="['Designer',{page: page}]" title="Page Designer"><i class="fa fa-edit"></i></a>
</scrollable>

Within the constructor of DesignerComponent, I have included the following code:

constructor(params: RouteParams) {
    this.page = params.get('page');
    console.log(this.page);//undefined
}

While the routing is functioning correctly to the designer component, I am encountering an issue when trying to access the page Object within the designer, as it is displaying as undefined. Any suggestions or solutions?

javascript typescript angular angular2-routing

Answer 1

Answer №1

When passing objects using router params, it is important to note that only strings can be passed as it needs to be reflected in the URL. A better approach may be to utilize a shared service to pass data between routed components.

Although the old router allows for passing data, the new router in RC.1 does not yet support this feature.

Update

In RC.4, the ability to pass data has been re-introduced. You can read more about this in this discussion on How do I pass data in Angular 2 components while using Routing?

Answer 2

When passing objects using router params, it is important to note that only strings can be passed as it needs to be reflected in the URL. A better approach may be to utilize a shared service to pass data between routed components.

Although the old router allows for passing data, the new router in RC.1 does not yet support this feature.

Update

In RC.4, the ability to pass data has been re-introduced. You can read more about this in this discussion on How do I pass data in Angular 2 components while using Routing?

Answer 3

Answer №2

Something new in angular 2.1.0

Modify something.module.ts

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { BlogComponent } from './blog.component';
import { AddComponent } from './add/add.component';
import { EditComponent } from './edit/edit.component';
import { RouterModule } from '@angular/router';
import { MaterialModule } from '@angular/material';
import { FormsModule } from '@angular/forms';
const routes = [
  {
    path: '',
    component: BlogComponent
  },
  {
    path: 'add',
    component: AddComponent
  },
  {
    path: 'edit/:id',
    component: EditComponent,
    data: {
      type: 'edit'
    }
  }

];
@NgModule({
  imports: [
    CommonModule,
    RouterModule.forChild(routes),
    MaterialModule.forRoot(),
    FormsModule
  ],
  declarations: [BlogComponent, EditComponent, AddComponent]
})
export class BlogModule { }

Accessing data or parameters in edit component

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, Params, Data } from '@angular/router';
@Component({
  selector: 'app-edit',
  templateUrl: './edit.component.html',
  styleUrls: ['./edit.component.css']
})
export class EditComponent implements OnInit {
  constructor(
    private route: ActivatedRoute,
    private router: Router

  ) { }
  ngOnInit() {

    this.route.snapshot.params['id'];
    this.route.snapshot.data['type'];

  }
}

Answer 4

Something new in angular 2.1.0

Modify something.module.ts

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { BlogComponent } from './blog.component';
import { AddComponent } from './add/add.component';
import { EditComponent } from './edit/edit.component';
import { RouterModule } from '@angular/router';
import { MaterialModule } from '@angular/material';
import { FormsModule } from '@angular/forms';
const routes = [
  {
    path: '',
    component: BlogComponent
  },
  {
    path: 'add',
    component: AddComponent
  },
  {
    path: 'edit/:id',
    component: EditComponent,
    data: {
      type: 'edit'
    }
  }

];
@NgModule({
  imports: [
    CommonModule,
    RouterModule.forChild(routes),
    MaterialModule.forRoot(),
    FormsModule
  ],
  declarations: [BlogComponent, EditComponent, AddComponent]
})
export class BlogModule { }

Accessing data or parameters in edit component

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, Params, Data } from '@angular/router';
@Component({
  selector: 'app-edit',
  templateUrl: './edit.component.html',
  styleUrls: ['./edit.component.css']
})
export class EditComponent implements OnInit {
  constructor(
    private route: ActivatedRoute,
    private router: Router

  ) { }
  ngOnInit() {

    this.route.snapshot.params['id'];
    this.route.snapshot.data['type'];

  }
}

Answer 5

Answer №3

Here is a way to achieve this:

app-routing-modules.ts:

import { NgModule                   }    from '@angular/core';
import { RouterModule, Routes       }    from '@angular/router';
import { PowerBoosterComponent      }    from './component/power-booster.component';


export const routes: Routes = [
  { path:  'pipeexamples', component: PowerBoosterComponent, 
data:{ name:'shubham' } },
    ];
    @NgModule({
      imports: [ RouterModule.forRoot(routes) ],
      exports: [ RouterModule ]
    })
    export class AppRoutingModule {}

In the route above, data is passed through the path 'pipeexamples' to PowerBoosterComponent. To access this data in PowerBoosterComponent, follow these steps:

power-booster-component.ts

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, Params, Data } from '@angular/router';

@Component({
  selector: 'power-booster',
  template: `
    <h2>Power Booster</h2>`
})

export class PowerBoosterComponent implements OnInit {
  constructor(
    private route: ActivatedRoute,
    private router: Router

  ) { }
  ngOnInit() {
    console.log("Data via params: ", this.route.snapshot.data['name']);
  }
}

To retrieve the data, use this.route.snapshot.data['name'].

Answer 6

Here is a way to achieve this:

app-routing-modules.ts:

import { NgModule                   }    from '@angular/core';
import { RouterModule, Routes       }    from '@angular/router';
import { PowerBoosterComponent      }    from './component/power-booster.component';


export const routes: Routes = [
  { path:  'pipeexamples', component: PowerBoosterComponent, 
data:{ name:'shubham' } },
    ];
    @NgModule({
      imports: [ RouterModule.forRoot(routes) ],
      exports: [ RouterModule ]
    })
    export class AppRoutingModule {}

In the route above, data is passed through the path 'pipeexamples' to PowerBoosterComponent. To access this data in PowerBoosterComponent, follow these steps:

power-booster-component.ts

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, Params, Data } from '@angular/router';

@Component({
  selector: 'power-booster',
  template: `
    <h2>Power Booster</h2>`
})

export class PowerBoosterComponent implements OnInit {
  constructor(
    private route: ActivatedRoute,
    private router: Router

  ) { }
  ngOnInit() {
    console.log("Data via params: ", this.route.snapshot.data['name']);
  }
}

To retrieve the data, use this.route.snapshot.data['name'].

Answer 7

Answer №4

1. Configure routes to handle incoming data

{
    path: 'some-route',
    loadChildren: 
      () => import(
        './some-component/some-component.module'
      ).then(
        m => m.SomeComponentModule
      ),
    data: {
      key: 'value',
      ...
    },
}

2. Navigate to a specific route:

From HTML:

<a [routerLink]=['/some-component', { key: 'value', ... }> ... </a>

Or from Typescript:

import {Router} from '@angular/router';

...

 this.router.navigate(
    [
       '/some-component',
       {
          key: 'value',
          ...
       }
    ]
 );

3. Retrieve data from the route

import {ActivatedRoute} from '@angular/router';

...

this.value = this.route.snapshot.params['key'];

Answer 8

1. Configure routes to handle incoming data

{
    path: 'some-route',
    loadChildren: 
      () => import(
        './some-component/some-component.module'
      ).then(
        m => m.SomeComponentModule
      ),
    data: {
      key: 'value',
      ...
    },
}

2. Navigate to a specific route:

From HTML:

<a [routerLink]=['/some-component', { key: 'value', ... }> ... </a>

Or from Typescript:

import {Router} from '@angular/router';

...

 this.router.navigate(
    [
       '/some-component',
       {
          key: 'value',
          ...
       }
    ]
 );

3. Retrieve data from the route

import {ActivatedRoute} from '@angular/router';

...

this.value = this.route.snapshot.params['key'];

How to Transfer Data to Routes in Angular 2?

Answer №1

Answer №2

Answer №3

Answer №4

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