如何在特定列的角材料数据表中进行过滤 [英] How to do filter in angular material data table for specific column

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;
};

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