I am using ngFor to populate my column names and corresponding data in Angular. How can I implement a separate filter row for each column in an Angular Material table?
This filter row should appear below the header row, which displays the different column names.
To filter specific columns only, it is necessary to customize the filterPredicate in the following way:
import {MatTableDataSource} from '@angular/material';
export interface Element {
id: string;
name: number;
age:number;
}
const dataItemsArray: Element[] = [
{id: 1, name: 'Ali', age:23},
{id: 2, name: 'Umar', age:43},
{id: 3, name: 'Asim', age:21},
]
export class TableFiltering{
dataSource = new MatTableDataSource(dataItemsArray);
ngOnInit() {
this.dataSource.filterPredicate = (data: Element, filter:string) =>
(data.name.indexOf(filter) !== -1 ||
data.id.indexOf(filter) !== -1 );
}
.
.
.
.
}
Alternatively, for filtering all columns, set a value to the filter property:
ngOnInit() {
// To apply filter, call the applyFilter function with a filter value from code or template
applyFilter(filterValue: string) {
// Remove white spaces and convert to lowercase
// filterValue = filterValue.trim();
// filterValue = filterValue.toLowerCase();
this.dataSource.filter = filterValue;
}
}
You can choose either approach (filterPredicate or dataSource.filter) based on your needs. Ensure that you implement them within ngOnInit().
Using MatTableDataSource as suggested in the official documentation.
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