如何在特定列的角材料数据表中进行过滤

如何在特定列的角材料数据表中进行过滤

本文介绍了如何在特定列的角材料数据表中进行过滤的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试角材料数据表.

i am trying angular material data table.

正如我们所知,默认情况下对每一行进行过滤.

As we know filtering happened for each row by default.

如果我想过滤特定列,那我该怎么办?

If i want to filter column specific, then what should i do?

我是否应该编写获取所有记录的方法,然后对其进行迭代并比较特定列?

Should i have to write method for getting all records, then iterate over it and compare specific column?

component.ts

component.ts

ngOnInit() {
    this.service.getUser().subscribe( results => {
        if(!results){

          return;
        }
        console.log(results);
        this.dataSource = new MatTableDataSource(results);
        this.dataSource.sort = this.sort;
    })


onSearchClear(){
    this.searchKey="";
    this.applyFilter();
  }

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

component.html

component.html

<mat-form-field class="search-form-field">
      <input matInput [(ngModel)]="searchKey" placeholder="search by userName" (keyup)="applyFilter()">
    </mat-form-field>

推荐答案

you should use filterPredicate property of MatTableDataSource

you should use filterPredicate property of MatTableDataSource

初始化this.dataSource后,定义一个自定义filterPredicate函数如下;

after you initialize this.dataSource, define a custom filterPredicate function as follows;

this.dataSource = new MatTableDataSource(results);
this.dataSource.sort = this.sort;
this.dataSource.filterPredicate = function(data: any, filterValue: string) {
  return data.specificColumn /** replace this with the column name you want to filter */
    .trim()
    .toLocaleLowerCase().indexOf(filterValue.trim().toLocaleLowerCase()) >= 0;
};

这篇关于如何在特定列的角材料数据表中进行过滤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!

07-24 19:52