Angular Material Table 使用反应式数组排序

Question

我正在尝试使用 formArray 作为输入数据源对 angular material table 实施排序/过滤。

dataSource = new MatTableDataSource([]);
<table mat-table [dataSource]="formdataarray.controls" multiTemplateDataRows class="mat elevation-z8" matSort >
<ng-container  matColumnDef="{{column}}" *ngFor="let column of columnsToDisplay" >
<th mat-header-cell *matHeaderCellDef mat-sort-header>{{column}}</th>
<td mat-cell *matCellDef="let element"> {{ element.value[column] }}  </td>
</ng-container>

但是排序/过滤不起作用

Answer 1

您还需要添加活动 (matSortChange)=sortTable($event)

到 table 标签

并在组件内部添加sortTable逻辑

Answer 2

这里有两个选择：

使用普通数组 formdataarray.controls 作为 dataSource 并实现所有 DataSource 方法，如过滤器，自行排序。或者编写自定义 CDK 数据源实现。另见 https://blog.angular-university.io/angular-material-data-table/
使用 MatTableDataSource 并调整筛选和排序逻辑以支持 AbstractControl 对象。

html

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

ts

ngOnInit() {
  // fill FormArray
  ...
  this.dataSource.data = this.formdataarray.controls;
  this.dataSource.sortingDataAccessor = (data: AbstractControl, sortHeaderId: string) => {
    const value: any = data.value[sortHeaderId];
    return typeof value === 'string' ? value.toLowerCase() : value;
  };

  const filterPredicate = this.dataSource.filterPredicate;
  this.dataSource.filterPredicate = (data: AbstractControl, filter) => {
    return filterPredicate.call(this.dataSource, data.value, filter);
  }
}

Forked Stackblitz

此外，如果您想向 FormArray 添加新项目，您也应该更新 this.dataSource.data。另见

Answer 3

Requires ngAfterViewInit to work

import { MatTableDataSource } from '@angular/material/table';
import { MatSort } from '@angular/material/sort';

...

@ViewChild(MatSort, {static: false}) sort: MatSort

...

ngOnInit() {
  this.getYourData$.subscribe(d => this.data = new MatTableDataSource(d));
}

ngAfterViewInit(): void {

  this.data.sortingDataAccessor = (data: AbstractControl, sortHeaderId: string) => {
  const value: any = data.value[sortHeaderId];
  return typeof value === 'string' ? value.toLowerCase() : value;
};

this.data.sort = this.sort; // where this.sort defined above.

  this.data.filterPredicate = (data: AbstractControl, filter) => {
  // return true or false on data.
  }
}


... html

<table matSort ...

Angular Material Table 使用反应式数组排序

Angular Material Table Sorting with reactive formarray

angular

angular-material

material-design

material-table

angular-material-table