Tôi đang cố gắng để mat-tablesắp xếp hoạt động cục bộ và trong khi tôi có thể khiến dữ liệu hiển thị như mong đợi, việc nhấp vào hàng tiêu đề không thực hiện việc sắp xếp như trên các ví dụ trực tuyến (không có gì xảy ra cả). Tôi đang cố gắng làm cho bản demo này hoạt động cục bộ:
https://material.angular.io/components/sort/overview
https://plnkr.co/edit/XF5VxOSEBxMTd9Yb3ZLA?p=preview
Tôi đã tạo một dự án mới với Angular CLI, sau đó làm theo các bước sau: https://material.angular.io/guide/getting-started
Đây là các tệp cục bộ của tôi:
app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { MatSort, MatTableModule } from '@angular/material';
import { AppComponent } from './app.component';
import { TableSortingExample } from './table-sorting-example';
@NgModule({
declarations: [
AppComponent,
TableSortingExample,
MatSort
],
imports: [
BrowserModule,
MatTableModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }app.component.ts
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'app';
}app.component.html
<div style="text-align:center">
<h1>
Welcome to {{title}}!
</h1>
<table-sorting-example></table-sorting-example>
</div>table-sorting-example.html
<div class="example-container mat-elevation-z8">
<mat-table #table [dataSource]="dataSource" matSort>
<!--- Note that these columns can be defined in any order.
The actual rendered columns are set as a property on the row definition" -->
<!-- ID Column -->
<ng-container matColumnDef="userId">
<mat-header-cell *matHeaderCellDef mat-sort-header> ID </mat-header-cell>
<mat-cell *matCellDef="let row"> {{row.id}} </mat-cell>
</ng-container>
<!-- Progress Column -->
<ng-container matColumnDef="progress">
<mat-header-cell *matHeaderCellDef mat-sort-header> Progress </mat-header-cell>
<mat-cell *matCellDef="let row"> {{row.progress}}% </mat-cell>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="userName">
<mat-header-cell *matHeaderCellDef mat-sort-header> Name </mat-header-cell>
<mat-cell *matCellDef="let row"> {{row.name}} </mat-cell>
</ng-container>
<!-- Color Column -->
<ng-container matColumnDef="color">
<mat-header-cell *matHeaderCellDef mat-sort-header> Color </mat-header-cell>
<mat-cell *matCellDef="let row" [style.color]="row.color"> {{row.color}} </mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>
</div>
<!-- Copyright 2017 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license -->table-sorting-example.ts
import {Component, ViewChild} from '@angular/core';
import {DataSource} from '@angular/cdk/collections';
import {MatSort} from '@angular/material';
import {BehaviorSubject} from 'rxjs/BehaviorSubject';
import {Observable} from 'rxjs/Observable';
import 'rxjs/add/operator/startWith';
import 'rxjs/add/observable/merge';
import 'rxjs/add/operator/map';
/**
* @title Table with sorting
*/
@Component({
selector: 'table-sorting-example',
styleUrls: ['table-sorting-example.css'],
templateUrl: 'table-sorting-example.html',
})
export class TableSortingExample {
displayedColumns = ['userId', 'userName', 'progress', 'color'];
exampleDatabase = new ExampleDatabase();
dataSource: ExampleDataSource | null;
@ViewChild(MatSort) sort: MatSort;
ngOnInit() {
this.dataSource = new ExampleDataSource(this.exampleDatabase, this.sort);
}
}
/** Constants used to fill up our data base. */
const COLORS = ['maroon', 'red', 'orange', 'yellow', 'olive', 'green', 'purple',
'fuchsia', 'lime', 'teal', 'aqua', 'blue', 'navy', 'black', 'gray'];
const NAMES = ['Maia', 'Asher', 'Olivia', 'Atticus', 'Amelia', 'Jack',
'Charlotte', 'Theodore', 'Isla', 'Oliver', 'Isabella', 'Jasper',
'Cora', 'Levi', 'Violet', 'Arthur', 'Mia', 'Thomas', 'Elizabeth'];
export interface UserData {
id: string;
name: string;
progress: string;
color: string;
}
/** An example database that the data source uses to retrieve data for the table. */
export class ExampleDatabase {
/** Stream that emits whenever the data has been modified. */
dataChange: BehaviorSubject<UserData[]> = new BehaviorSubject<UserData[]>([]);
get data(): UserData[] { return this.dataChange.value; }
constructor() {
// Fill up the database with 100 users.
for (let i = 0; i < 100; i++) { this.addUser(); }
}
/** Adds a new user to the database. */
addUser() {
const copiedData = this.data.slice();
copiedData.push(this.createNewUser());
this.dataChange.next(copiedData);
}
/** Builds and returns a new User. */
private createNewUser() {
const name =
NAMES[Math.round(Math.random() * (NAMES.length - 1))] + ' ' +
NAMES[Math.round(Math.random() * (NAMES.length - 1))].charAt(0) + '.';
return {
id: (this.data.length + 1).toString(),
name: name,
progress: Math.round(Math.random() * 100).toString(),
color: COLORS[Math.round(Math.random() * (COLORS.length - 1))]
};
}
}
/**
* Data source to provide what data should be rendered in the table. Note that the data source
* can retrieve its data in any way. In this case, the data source is provided a reference
* to a common data base, ExampleDatabase. It is not the data source's responsibility to manage
* the underlying data. Instead, it only needs to take the data and send the table exactly what
* should be rendered.
*/
export class ExampleDataSource extends DataSource<any> {
constructor(private _exampleDatabase: ExampleDatabase, private _sort: MatSort) {
super();
}
/** Connect function called by the table to retrieve one stream containing the data to render. */
connect(): Observable<UserData[]> {
const displayDataChanges = [
this._exampleDatabase.dataChange,
this._sort.sortChange,
];
return Observable.merge(...displayDataChanges).map(() => {
return this.getSortedData();
});
}
disconnect() {}
/** Returns a sorted copy of the database data. */
getSortedData(): UserData[] {
const data = this._exampleDatabase.data.slice();
if (!this._sort.active || this._sort.direction == '') { return data; }
return data.sort((a, b) => {
let propertyA: number|string = '';
let propertyB: number|string = '';
switch (this._sort.active) {
case 'userId': [propertyA, propertyB] = [a.id, b.id]; break;
case 'userName': [propertyA, propertyB] = [a.name, b.name]; break;
case 'progress': [propertyA, propertyB] = [a.progress, b.progress]; break;
case 'color': [propertyA, propertyB] = [a.color, b.color]; break;
}
let valueA = isNaN(+propertyA) ? propertyA : +propertyA;
let valueB = isNaN(+propertyB) ? propertyB : +propertyB;
return (valueA < valueB ? -1 : 1) * (this._sort.direction == 'asc' ? 1 : -1);
});
}
}
/** Copyright 2017 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license */Có ai biết tại sao nó sẽ hiển thị giống như bảng trực tuyến nhưng thiếu chức năng sắp xếp không?
Nó đang hoạt động đối với tôi mà không có sắp xếp @ViewChild (MatSort): MatSort; Có lý do gì không?
—
user123456
ng test --sm=falsevà xem những gì xuất hiện.