以多个路径角度访问数据数组4

Question

我有一个服务，其中包含一些像这样存储的数据以及将数据推送到它的函数：

service.ts

    import { Component, ViewChild, ElementRef, OnInit } from '@angular/core';
    import { SongsComponent } from './songs/songs.component';
    import { Router } from '@angular/router';
    import { SongsService } from './songs.service';

    @Component({
      selector: 'app-root',
      templateUrl: './app.component.html',
      styleUrls: ['./app.component.css'],
      providers: []
    })
    export class AppComponent {
        albums:any = [];

        constructor(private songsService: SongsService){
        };


        ngOnInit() {
            this.songsService.init()    
    }

    }

我已将 app.component 设置为运行init函数作为种子：

     const appRoutes: Routes =[
        {path: '', component: AlbumsComponent},
        {path: ':album', component: SongsComponent},
      ];

      @NgModule({
        declarations: [
          SongsComponent,
          AppComponent,
          AlbumsComponent    
        ],
        imports: [
          BrowserModule,
          FormsModule,
          RouterModule.forRoot(appRoutes),
          HttpModule
        ],
        providers: [SongsService],
        bootstrap: [AppComponent]
      })
      export class AppModule {}

App.module

    @Component({
      selector: 'app-albums',
      templateUrl: './albums.component.html',
      styleUrls: ['./albums.component.css'],
      providers: []
    })
    export class AlbumsComponent {

     @ViewChild('albumInput') albumInput: ElementRef;
     @ViewChild('deleteIcon') deleteIcon: ElementRef;

        private albums:{name: string, songs:Array<string>}[] = [];
        private subscription: Subscription;

        constructor(private songsService: SongsService,
                    private router: Router){};

     ngOnInit() {
            this.albums = this.songsService.albums;
            this.subscription = this.songsService.albumsChanged
            .subscribe(
                (albums:{name: string, songs:Array<string>}[]) => {
                    this.albums = albums;
                });
            console.log(this.albums);
     }

        albumslog(){
            console.log(this.albums)
        }

        // albumSongs(){
        //  this.router.navigate([])
        // }

      deleteAlbum(indexOfAlbum){
        console.log(this);
        console.log(indexOfAlbum);
        this.songsService.albums.splice(indexOfAlbum,1);

      addAlbum(albumName){
        this.songsService.newAlbum(albumName);
        console.log(this.songsService.albums);

当我在下一个组件中的console.log（this.albums）时，它只有我在service.ts上硬编码的种子。

Albums.component.ts

   @Component({
      selector: 'app-songs',
      templateUrl: './songs.component.html',
      styleUrls: ['./songs.component.css'],
      providers: []
    })

    export class SongsComponent implements OnInit {
       private subscription: Subscription;
       private albums:any;
       private album:any;
       private songs:Array<string>;
       private albumIndex:string;

      constructor(private songsService: SongsService,
                  private router: Router,
                  private route: ActivatedRoute){};

      ngOnInit() {
        var albumIndex = +this.route.snapshot.params['album'];
        console.log(albumIndex);
        this.albums = this.songsService.albums;
         this.subscription = this.songsService.albumsChanged
         .subscribe(
           (albums:{name: string, songs:Array<string>}[]) => {
             this.albums = albums;
             this.songs = this.getAlbum(albumIndex);

           });
         console.log(this.albums);
        this.getAlbum(albumIndex);
        // console.log(this.songsService.getAlbum("Así en el Cielo Como en la Selva"))
        console.log(this.songs);
      }

      getAlbum(index: number){
        return this.album = this.albums.splice(index)

songs.components ：

service.albums

因此，当我转到另一条路线时，我的服务中的if(cell.getStringCellValue().contains(",")){ if (cell.getStringCellValue().contains("\"")){ String t= "\""+cell.getStringCellValue()+"\""; data.append(t+","); } else{ data.append("\""+cell.getStringCellValue()+"\""+","); } } 为空，我如何将这些数据保存在多条路线上？