Angular-如何在模板文件中添加或使用搜索过滤器管道

如何解决Angular-如何在模板文件中添加或使用搜索过滤器管道

我正在尝试学习角度学习，但我遇到了一个小问题。我想在表中添加搜索过滤器。对于桌子，我使用的是角材。我不知道，或者您可以说我不知道​​在模板文件中如何以及在何处使用管道过滤器。下面是我的源代码文件。

filter.pipe.ts：

import { Pipe,PipeTransform } from '@angular/core';

@Pipe({
  name: 'productfilter'
})
export class ProductfilterPipe implements PipeTransform {

  transform(value:any,searchTerm:any): any {
    return value.filter(function(searchelement){
      return searchelement.name.indexOf(searchTerm) > -1
    })
    
  }

}

component.ts：

import { Component,OnInit } from '@angular/core';
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'},];
@Component({
  selector: 'app-products',templateUrl: './products.component.html',styleUrls: ['./products.component.scss']
})
export class ProductsComponent implements OnInit {
  searchedResult:string="";
  constructor() { }

  ngOnInit(): void {
  }
  displayedColumns: string[] = ['position','name','weight','symbol'];
  dataSource = ELEMENT_DATA;
}

模板文件：

  <form class="example-form">
    <mat-form-field class="example-full-width">
      <mat-label>Elements</mat-label>
      <input matInput placeholder="search element here..." [(ngModel)]="searchedResult">
    </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>
  
  

请提供我在模板文件中添加管道过滤器的解决方案。预先感谢