如何在一个组件中拥有多个 Mat Paginator 实例？

Question

因为我的 HTML 文件有一个 ngIf，所以我不得不重新调整包含我的 Mat Table / Mat Paginator 的组件。熟悉的人会知道 Mat Paginator 不符合处理分页器的标准约定，因为数据到达需要时间。下面是当 ONE 表使用 mat 分页时有效的更新打字稿。

现在，我需要在同一个组件中有两个带有 Mat Pagination 的表格。但是，我只能让一个工作。由于我是 Angular 的新手，我希望有人能帮助我指出正确的方向。随着我继续进行更多研究，我将更新我的问题。不过，据我了解，每个组件只能有一个 Mat Pagination 实例。

您将在下面找到有效的 Typescript 代码：

 dataSource1 = new MatTableDataSource<any>(this.userData());
 dataSource2 = new MatTableDataSource<any>(this.userData2());

 private paginator: MatPaginator;

  @ViewChild(MatPaginator, { static: false }) set matPaginator(mp: MatPaginator) {
    this.paginator = mp;
    this.dataSource1.paginator = this.paginator;
  }

ngOnInit() {
    this.dataSource1.paginator = this.paginator;
  }

最终，我希望分页适用于 dataSource1 和 dataSource2。显然，当我在 ngOnInit 和 ViewChild 中声明 this.dataSource2.paginator = this.paginator 时，它会破坏两者的分页。我已经验证我的 HTML 没有问题。

Answer 1

我对具有相同分页器的 2 个表没有任何问题，我遵循 angular 文档指南并看到工作：

ts 文件：

import { Component, OnInit, ViewChild } from '@angular/core';
import {PageEvent, MatPaginator} from '@angular/material/paginator';
import { MatTableDataSource } from '@angular/material/table';

export interface PeriodicElement {
  name: string;
  position: number;
  weight: number;
  symbol: string;
}

const ELEMENT_DATA: PeriodicElement[] = [
  {position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
  {position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
  {position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
  {position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
  {position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
  {position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
  {position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
  {position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
  {position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
  {position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];

const ELEMENT_DATA2: PeriodicElement[] = [
  {position: 1, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
  {position: 2, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
  {position: 3, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
  {position: 4, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
  {position: 5, name: 'Carbon', weight: 12.0107, symbol: 'C'},
  {position: 6, name: 'Boron', weight: 10.811, symbol: 'B'},
  {position: 7, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
  {position: 8, name: 'Lithium', weight: 6.941, symbol: 'Li'},
  {position: 9, name: 'Helium', weight: 4.0026, symbol: 'He'},
  {position: 10, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
];

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{
  title = 'bootstrapDivTextInside';
  displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
  dataSource = new MatTableDataSource<PeriodicElement>(ELEMENT_DATA);
  dataSource2 = new MatTableDataSource<PeriodicElement>(ELEMENT_DATA2);
  length = 100;
  pageSize = 2;
  pageSizeOptions: number[] = [5, 10, 25, 100];
  pageEvent: PageEvent;
  @ViewChild(MatPaginator, {static: true}) paginator: MatPaginator;

  constructor() {}

  ngOnInit() {
    this.dataSource.paginator = this.paginator;
    this.dataSource2.paginator = this.paginator;
  }

}

html模板：

<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">

  <!--- Note that these columns can be defined in any order.
        The actual rendered columns are set as a property on the row definition" -->

  <!-- Position Column -->
  <ng-container matColumnDef="position">
    <th mat-header-cell *matHeaderCellDef> No. </th>
    <td mat-cell *matCellDef="let element"> {{element.position}} </td>
  </ng-container>

  <!-- Name Column -->
  <ng-container matColumnDef="name">
    <th mat-header-cell *matHeaderCellDef> Name </th>
    <td mat-cell *matCellDef="let element"> {{element.name}} </td>
  </ng-container>

  <!-- Weight Column -->
  <ng-container matColumnDef="weight">
    <th mat-header-cell *matHeaderCellDef> Weight </th>
    <td mat-cell *matCellDef="let element"> {{element.weight}} </td>
  </ng-container>

  <!-- Symbol Column -->
  <ng-container matColumnDef="symbol">
    <th mat-header-cell *matHeaderCellDef> Symbol </th>
    <td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
  </ng-container>

  <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
  <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
<!---*******************************************************************************-->
<table mat-table [dataSource]="dataSource2" class="mat-elevation-z8">

  <!--- Note that these columns can be defined in any order.
        The actual rendered columns are set as a property on the row definition" -->

  <!-- Position Column -->
  <ng-container matColumnDef="position">
    <th mat-header-cell *matHeaderCellDef> No. </th>
    <td mat-cell *matCellDef="let element"> {{element.position}} </td>
  </ng-container>

  <!-- Name Column -->
  <ng-container matColumnDef="name">
    <th mat-header-cell *matHeaderCellDef> Name </th>
    <td mat-cell *matCellDef="let element"> {{element.name}} </td>
  </ng-container>

  <!-- Weight Column -->
  <ng-container matColumnDef="weight">
    <th mat-header-cell *matHeaderCellDef> Weight </th>
    <td mat-cell *matCellDef="let element"> {{element.weight}} </td>
  </ng-container>

  <!-- Symbol Column -->
  <ng-container matColumnDef="symbol">
    <th mat-header-cell *matHeaderCellDef> Symbol </th>
    <td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
  </ng-container>

  <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
  <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>

<mat-paginator [length]="length"
              [pageSize]="pageSize"
              [pageSizeOptions]="pageSizeOptions"
              (page)="pageEvent = $event">
</mat-paginator>

编辑：

在你的情况下：

export class AdminComponent implements OnInit, AfterContentInit {
  USER_DATA: UserData[] = [];
  ORGANIZATION_DATA: OrganizationData[] = [];
  // Table Variables
  dataSourceUsers = new MatTableDataSource<UserData[]>(this.USER_DATA);
  dataSourceOrganizations = new MatTableDataSource<OrganizationData[]>(this.ORGANIZATION_DATA);
@ViewChild(MatPaginator, {static: true}) paginator: MatPaginator;

然后在ngOnInit中执行函数带入信息然后设置分页器：

ngOnInit() {
    this.userData(); 
    this.dataSourceUsers.paginator = this.paginator;
    this.organizationData()
    this.dataSourceOrganizations.paginator = this.paginator;
  }