Angular 2表搜索管道过滤器不起作用 [英] Angular 2 Table Search Pipe Filter not working

问题描述

我正在Angular 2中创建一个表组件，在其中创建了一个通用的表搜索过滤器管道，它可以正常工作，但不会在相应的列中显示值。
当我开始在文本框中键入搜索键时，过滤后的值会正确显示，但不会显示在其相应列下。
很抱歉，如果这个问题重复出现，我已经在网络上花了足够的时间，但是我无法找到解决方案。

I am creating a table component in Angular 2, in which I am creating a common table search filter pipe, it is working correctly but not displaying the values in their appropriate columns. When I start typing the search keys in the text box the filtered values are displayed correctly but not under their appropriate columns. Sorry if this question is a duplicated one, I have spent enough time in searching the web but I was unable to get a solution for it.

下面是供您参考的代码

component.ts

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  public tableData: any = [
     {"Name":"Gaurav","Address":"Chennai","Contact":"9632587410"},
     {"Name":"Rakesh","Address":"Goa","Contact":"852397410"}
  ];
}

Pipe.ts

@Pipe({
  name: 'searchPipe'
})
export class searchPipe implements PipeTransform {
   transform(value: any, args: string[]): any {
      let filter = args[0];

      if (filter && Array.isArray(value)) {
         let filterKeys = Object.keys(filter);
         return value.filter(item =>
            filterKeys.reduce((key, keyName) =>
               key && item[keyName].toUpperCase() === filter[keyName].toUpperCase(), true));
      } else {
         return value;
      }
   }
}

component.html

<input type="text" #searchFilter (keyup)="0"/>
<table>
  <tr>
    <th *ngFor="let colValues of tableData | columnPipe">{{colValues}}</th>
  </tr>
  <tr *ngFor="let row of tableData">
    <td *ngFor="let rowValues of row | rowPipe |searchPipe:searchFilter.value">{{rowValues}}</td>
  </tr>
</table>

完全正常工作柱塞，帮助我解决问题

Full working Plunker, help me in resolving the issues

推荐答案

我想您想要像这样： https://plnkr.co/edit/olkIEiOc67Ld28NuASef?p=preview

您不想隐藏整个 td ，而是只想隐藏值..

You dont want to "hide" the whole td, instead you just want to "hide" the value..

@Pipe({
  name: 'searchPipe'
})
export class searchPipe implements PipeTransform {
  transform(value: any, args: string[]): any {
    let filter = args[0];

    if (filter && Array.isArray(value)) {
      let filterKeys = Object.keys(filter);
      return value.filter(item => filterKeys.reduce((key, keyName) => key && item[keyName].toUpperCase() === filter[keyName].toUpperCase(), true));
    }
    // new case !
    else if (filter && typeof value === 'string') {
      return value.toUpperCase().indexOf(filter.toUpperCase()) >= 0 ? value : '';
    }
    else {
      return value;
    }
  }
}

<td *ngFor="let rowValues of row | rowPipe">{{ rowValues | searchPipe : searchFilter.value }}</td>

更新

要显示整行，必须过滤 tableData 。

To show the whole row, you have to filter your tableData.

按如下所示更改管道：

@Pipe({
  name: 'searchPipe'
})
export class searchPipe implements PipeTransform {
  transform(values: any[], filter: string): any {
    if (!values || !values.length) return [];
    if (!filter) return values;

    filter = filter.toUpperCase();

    if (filter && Array.isArray(values)) {
      const keys = Object.keys(values[0]);
      return values.filter(v => v && keys.some(k => v[k].toUpperCase().indexOf(filter) >= 0));
    }
  }
}

<tr *ngFor="let row of tableData | searchPipe : searchFilter.value">
  <td *ngFor="let rowValues of row | rowPipe">{{ rowValues }}</td>
</tr>

实时演示： https://plnkr.co/edit/jXfqfCuJpKdw9HtL569T?p=preview

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