当数据源为 Observable<T> 时，如何在 Angular Material Data Table 中启用排序 [英] How to enable sorting in Angular Material Data Table, when the datasource is Observable&lt;T&gt;

问题描述

我的组件中有一个下表，

I have a following table in my component,

<table [dataSource]="(searchResults$ | async)?.accounts" mat-table matSort multiTemplateDataRows>

          <ng-container matColumnDef="Code">
            <th *matHeaderCellDef mat-header-cell mat-sort-header> Account Code</th>
            <td *matCellDef="let account" mat-cell> {{account.code}} </td>
          </ng-container>

</table>

我在列定义和表级别都保留了 mat-sort 指令.
https://material.angular.io/components/table/examples 中提供的所有示例a> - 当从 TS 文件设置而不是可观察流时，列出数据源.

I have kept mat-sort directive in both the column definition and at table level.
All the examples provided in https://material.angular.io/components/table/examples - lists down dataSource when set from TS file not as observable stream.

推荐答案

我只是因为这个问题纠结了一段时间，所以把它放在这里，希望能节省一些时间.什么对我有用:

Was just banging my head against the wall about this one for a while so putting this here to hopefully save someone some time. What worked for me:

component.ts:

component.ts:

@Input() dataSource;

@ViewChild(MatSort, {static: true}) sort: MatSort;

ngAfterViewInit() {
  this.dataSource.subscribe(data => {
    this.dataSource = new MatTableDataSource(data);
    this.dataSource.sort = this.sort;
  });
}

component.html:

component.html:

<app-table [dataSource]="yourService.getData()"></app-table>

确保在将 Observable 传递给 dataSource 时不要使用 async 管道.

Make sure you don't use the async pipe when passing the Observable to dataSource.

我是 Angular、TS 和 RxJS 的新手(通常使用 React)，所以如果有人发现这种方法有问题，请告诉我！

I'm new to Angular, TS and RxJS (usually work with React) so if anyone sees issues with this approach let me know!

这篇关于当数据源为 Observable<T> 时，如何在 Angular Material Data Table 中启用排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！