Send data through routing paths in Angular

There is a lot of confusion on this topic because there are so many different ways to do it.

Here are the appropriate types used in the following screen shots:

private route: ActivatedRoute
private router: Router

1) Required Routing Parameters:

https://i.stack.imgur.com/WJGO8.png

2) Route Optional Parameters:

https://i.stack.imgur.com/T1TPO.png

3) Route Query Parameters:

https://i.stack.imgur.com/xbX48.png

4) You can use a service to pass data from one component to another without using route parameters at all.

For an example see: https://blogs.msmvps.com/deborahk/build-a-simple-angular-service-to-share-data/

I have a plunker of this here: https://plnkr.co/edit/KT4JLmpcwGBM2xdZQeI9?p=preview

There is a new method what came with Angular 7.2.0

https://angular.io/api/router/NavigationExtras#state

Send:

    this.router.navigate(['action-selection'], { state: { example: 'bar' } });

Receive:

    constructor(private router: Router) {
      console.log(this.router.getCurrentNavigation().extras.state.example); // should log out 'bar'
    }

You can find some additional info here:

https://github.com/angular/angular/pull/27198

The link above contains this example which can be useful: https://stackblitz.com/edit/angular-bupuzn

Latest version of angular (7.2 +) now has the option to pass additional information using NavigationExtras.

Home component

import {
  Router,
  NavigationExtras
} from '@angular/router';
const navigationExtras: NavigationExtras = {
  state: {
    transd: 'TRANS001',
    workQueue: false,
    services: 10,
    code: '003'
  }
};
this.router.navigate(['newComponent'], navigationExtras);

newComponent

test: string;
constructor(private router: Router) {
  const navigation = this.router.getCurrentNavigation();
  const state = navigation.extras.state as {
    transId: string,
    workQueue: boolean,
    services: number,
    code: string
  };
  this.test = "Transaction Key:" + state.transId + "<br /> Configured:" + state.workQueue + "<br /> Services:" + state.services + "<br /> Code: " + state.code;
}

Output

https://i.stack.imgur.com/ReGHC.png

Hope this would help!

I needed access to the data in CustomRouteReuseStrategy and I couldn't inject the Router there due to a circular dependency but you can use the Location object to read the state as well.

Send:

    this.router.navigate(['action-selection'], { state: { example: 'bar' } });

Receive:
    import { Location } from '@angular/common';

    constructor(private location: Location) {
      console.log(this.location.getState().example); // should log out 'bar'
    }

@dev-nish Your code works with little tweaks in them. make the

const navigationExtras: NavigationExtras = {
  state: {
    transd: 'TRANS001',
    workQueue: false,
    services: 10,
    code: '003'
  }
};

into

let navigationExtras: NavigationExtras = {
  state: {
    transd: '',
    workQueue: ,
    services: ,
    code: ''
  }
};

then if you want to specifically sent a type of data, for example, JSON as a result of a form fill you can send the data in the same way as explained before.

In navigateExtra we can pass only some specific name as argument otherwise it showing error like below: For Ex- Here I want to pass customer key in router navigate and I pass like this-

this.Router.navigate(['componentname'],{cuskey: {customerkey:response.key}});

but it showing some error like below:

Argument of type '{ cuskey: { customerkey: any; }; }' is not assignable to parameter of type 'NavigationExtras'.
  Object literal may only specify known properties, and 'cuskey' does not exist in type 'NavigationExt## Heading ##ras'

.

Solution: we have to write like this:

this.Router.navigate(['componentname'],{state: {customerkey:response.key}});

getStateById(stateId) { return this.http.get(environment.user_service_url + "/getStateById", {params:{"stateId": stateId}}); }

Best I found on internet for this is ngx-navigation-with-data. It is very simple and good for navigation the data from one component to another component. You have to just import the component class and use it in very simple way. Suppose you have home and about component and want to send data then

HOME COMPONENT

import { Component, OnInit } from '@angular/core';
import { NgxNavigationWithDataComponent } from 'ngx-navigation-with-data';

@Component({
 selector: 'app-home',
 templateUrl: './home.component.html',
 styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnInit {

constructor(public navCtrl: NgxNavigationWithDataComponent) { }

 ngOnInit() {
 }

 navigateToABout() {
  this.navCtrl.navigate('about', {name:"virendta"});
 }

}

ABOUT COMPONENT

import { Component, OnInit } from '@angular/core';
import { NgxNavigationWithDataComponent } from 'ngx-navigation-with-data';

@Component({
 selector: 'app-about',
 templateUrl: './about.component.html',
 styleUrls: ['./about.component.css']
})
export class AboutComponent implements OnInit {

 constructor(public navCtrl: NgxNavigationWithDataComponent) {
  console.log(this.navCtrl.get('name')); // it will console Virendra
  console.log(this.navCtrl.data); // it will console whole data object here
 }

 ngOnInit() {
 }

}

For any query follow https://www.npmjs.com/package/ngx-navigation-with-data

Comment down for help.