為什么我的angular2中的RouteParams沒有在angular2中刷新？

Question

當我單擊“編輯”按鈕時，我的RouteParams不能正常工作。

在第一個視圖中，我單擊鮑勃行上的btn編輯，這是第二個視圖

現在，我在瀏覽器中單擊“后退”按鈕，它返回到拳頭視圖。 然后我單擊彈出行上的編輯btn，這是第三個視圖（與第二個視圖相同，這是錯誤的）

然后我放了一些控制台進行調試。 這是控制台日志

這是我單擊編輯按鈕時的第一個視圖的代碼，它會啟動功能並在console.log圖片中記錄1和3記錄。

import {Component} from 'angular2/core';
import {CORE_DIRECTIVES} from 'angular2/common';
import { Router, RouteParams, ROUTER_DIRECTIVES } from 'angular2/router';
import {MailingListService} from'../../services/mailing-list/mailing-lists.service'
import {Subscriber} from '../../models/subscriber/subscriber';
import 'rxjs/Rx';
import {Observable} from 'rxjs/Rx';

@Component({
selector: 'subscriber-list-edit-view',
templateUrl: './app/components/subscriber-list-editor-view/subscriber-list-editor-view.html',
directives: [ROUTER_DIRECTIVES]
})

export class EditSubscriberListViewComponent {

subscribers: Subscriber[];
id: string;
constructor(private mailingListsService: MailingListService, params: RouteParams, private router: Router) {

    this.init(this.id = params.get("id"));
}


init(id: string) {
    this.mailingListsService.getSubscribers(this.id).subscribe(x => {
        this.subscribers = x;
    });
}
//this is fired when click the edit button
editSubscriber(subscriber: Subscriber) {

    this.router.navigate(['Subscribers.Edit', { id: this.id, subscriber: subscriber }]);
    console.log(subscriber);//this print the first and third record in console.log
}



deleteSubscriber(subscriber: Subscriber) {

    this.mailingListsService.deleteSubscriber(this.id, subscriber)
        .subscribe(() => { this.init(this.id) });

}


}

這是我單擊編輯按鈕並跳轉到編輯視圖后的第二個視圖的代碼，它觸發了構造函數並在console.log圖片中記錄了2條記錄和4條記錄

import {Component} from 'angular2/core';
import { Router, RouteParams } from 'angular2/router';
import {CORE_DIRECTIVES} from 'angular2/common';  
import {Subscriber}from '../../models/subscriber/subscriber';
import {MailingListService} from'../../services/mailing-list/mailing-lists.service'

@Component({
selector: 'create-subscriber-view',
templateUrl: './app/components/subscriber-creator-view/subscriber-creator-view.html'
})

export class CreateSubscriberComponent {
subscriber: Subscriber;
id: string;
subscriberId: string;  
name: string;
phoneNumber: string;
email: string;
isActivated: boolean;
isBusy: boolean;
isEdit: boolean;
constructor(private mailingListService: MailingListService,private params: RouteParams, private router: Router) {
    this.id = params.get("id");
    this.subscriber = params.get("subscriber");

    console.log(params.get("subscriber")); //this doesn't work well,print the second and forth record in the console.log

    if (this.subscriber != null) { this.isEdit = true; this.name = this.subscriber.name; this.phoneNumber = this.subscriber.phoneNumber; this.email = this.subscriber.email; this.subscriberId = this.subscriber.id; this.isActivated = this.subscriber.isActivated;};          

}

create() {
    if (this.phoneNumber == null && this.email == null) { alert("either phone or email is required ! "); return; }
    this.isBusy = true;
    this.mailingListService.createSubscriber(this.id, {
        name: this.name,
        phoneNumber: this.phoneNumber,
        email: this.email
    })     
        .subscribe(() => { this.router.navigate(['MailingLists.View', { id: this.id }]) });  
}  

edit() {
    if (this.phoneNumber == null && this.email == null) { alert("either phone or email is required ! "); return; }
    this.isBusy = true;
    this.mailingListService.editSubscriber(this.id, {
        name: this.name,
        phoneNumber: this.phoneNumber,
        email: this.email
    })
        .subscribe(() => { this.router.navigate(['MailingLists.View', { id: this.id }]) });  
}

}

如您所見，console.log中的第四條記錄不正確，因此我認為這是參數問題。 但是我不知道為什么以及如何解決這個問題。

這是routeconfig

 { path: '/MailingLists/:id/Subscribers/Create', component: CreateSubscriberComponent, as: 'Subscribers.Create' },
{ path: '/MailingLists/:id/Subscribers/Edit', component: CreateSubscriberComponent, as: 'Subscribers.Edit' },

創建和編輯使用相同的組件，但使用不同的URL。

Answer 1

因為以前我將訂戶作為對象傳遞，而routeparams通過引用找到了對象。 那也許就是為什么它沒有刷新數據的原因。

我在這里有一個可行的解決方案。 只需執行JSON.stringify（subscriber）即可，而不是傳遞對象，而傳遞字符串。

editSubscriber(subscriber: Subscriber) {
    this.router.navigate(['Subscribers.Edit', { id: this.id, subscriberString: JSON.stringify(subscriber) }])//here

}

現在，在第二個組件中，您將獲得字符串並執行JSON.parse（）

 constructor(private mailingListService: MailingListService, private params: RouteParams, private router: Router) {
    this.id = params.get("id");
    this.subscriberString = params.get("subscriberString");            
    if (this.subscriberString != null) {
        this.isEdit = true;
        this.subscriber = JSON.parse(this.subscriberString);//Here
        this.name = this.subscriber.name;
        this.phoneNumber = this.subscriber.phoneNumber;
        this.email = this.subscriber.email;
        this.subscriberId = this.subscriber.id;
        this.isActivated = this.subscriber.isActivated;
    };          

}

永遠記住，您的routeparams只能是字符串類型boolean的類型（原始類型？）