使用 mat-paginator 和 mat-table 使用可观察数组作为数据源

Question

我正在使用一个可观察数组作为数据源。这工作正常，除了我现在无法弄清楚如何使用分页器。下面是 html 和 ts

html

 <table mat-table #TABLE [dataSource]="cards" class="mat-elevation-z8">          
                <!-- Email Column -->
             <ng-container matColumnDef="date">
                <th mat-header-cell *matHeaderCellDef  class="tbl-th"> Date </th>
                <td mat-cell *matCellDef="let element"> {{core.pretifyDate(element.date)}} </td>
              </ng-container>

            <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
            <tr mat-row *matRowDef="let row; columns: displayedColumns;">
            </tr>
          </table>
          <mat-paginator [pageSizeOptions]="[5, 10, 20, 50, 100]" [pageSize]="pageSize" showFirstLastButtons></mat-paginator>

.ts

export class CardQueueComponent implements OnInit {

  @ViewChild('TABLE', {static: false}) table: MatTable<any>;
  @ViewChild(MatPaginator, {static: true}) paginator: MatPaginator;

  displayedColumns: string[] = [ 'image', 'customer', 'email',  'date', 'process' ];
  cards: Observable<Card[]> 
  pageSize = 5


  constructor(public dataSvc: SBDataService,
              public core:CoreService,
              private changeDetectorRefs: ChangeDetectorRef,
              ) { }

    async ngOnInit() {

      this.cards = this.dataSvc.fetchCards().pipe(
        map((cards: any) => cards.map(cardObj => {
          var c = new Card(cardObj.key, cardObj._frontImageUrl, cardObj._date, cardObj._rawData)

        return c
      }))
    );


    this.changeDetectorRefs.detectChanges();

    //this.dataSource.paginator = this.paginator;

  }

}

所以分页器上的最后一行注释是我在直接关联卡片观察后需要弄清楚的。请指教

Answer 1

您只需要在其中获取对表的 DataSource and set your paginator 的引用。例如：

dataSource = new MatTableDataSource()

async ngOnInit() {

  this.dataSvc.fetchCards().pipe(
    map((cards: any) => cards.map(cardObj => {
      var c = new Card(cardObj.key, cardObj._frontImageUrl, cardObj._date, cardObj._rawData)
  })).subscribe(cards => this.dataSource.data = cards);

);

ngAfterViewInit() {
  this.dataSource.paginator = this.paginator;
}

  <mat-table [dataSource]="dataSource">

使用 mat-paginator 和 mat-table 使用可观察数组作为数据源

using mat-paginator with mat-table using observable array as the datasource

observable

typescript

angular-material

angular

mat-table