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angular - MatTable OR 过滤器

问题描述

是否可以在 MatTable 上有一个或过滤器？想象一下，我有两个单独的搜索框，我想过滤其中任何一个是否匹配。有没有办法做到这一点？或者我需要创建一个自定义过滤谓词吗？谢谢！

编辑。例如，如果我有一个文本输入和一个日期选择器，我如何使用过滤器检查表中是否有与文本和/或日期匹配的内容？

标签： angularangular-materialangular-material2angular6

解决方案

您可以使用以下代码实现或过滤 MatTable。

对于 ts 文件

import {Component} from '@angular/core';
import {MatTableDataSource} from '@angular/material';

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'},
];

/**
 * @title Table with filtering
 */
@Component({
  selector: 'table-filtering-example',
  styleUrls: ['table-filtering-example.css'],
  templateUrl: 'table-filtering-example.html',
})
export class TableFilteringExample {
  search1: string;
  search2: string;
  displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
  dataSource = new MatTableDataSource(ELEMENT_DATA);

  applyFilter() {
    this.dataSource.filter = this.search1.trim().toLowerCase();

    if(this.dataSource.filteredData.length == 0){
        this.dataSource.filter = this.search2.trim().toLowerCase();
    }
  }
}

对于 html 文件

<mat-form-field>
  <input matInput (keyup)="applyFilter()" placeholder="Filter 1" [(ngModel)]="search1">
</mat-form-field>
<mat-form-field>
  <input matInput (keyup)="applyFilter()" placeholder="Filter 2" [(ngModel)]="search2">
</mat-form-field>
<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">

  <!-- 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>

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