我试图让mat-table
排序在本地工作,虽然我可以按预期显示数据,但点击标题行不会像在线示例那样进行排序(根本不会发生任何事情)。我想让这个演示在本地工作:https://material.angular.io/components/sort/overview https://plnkr.co/edit/XF5VxOSEBxMTd9Yb3ZLA?p=preview
我使用Angular CLI生成了一个新项目,然后按照以下步骤操作:https://material.angular.io/guide/getting-started
这是我的本地文件:
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>
表分拣example.html的
<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 -->
表分拣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 */
有没有人知道为什么它会像在线表一样出现但缺乏排序功能?
对于任何可能遇到此问题的人:问题是我没有在角度材料网站上正确阅读API参考,该部分说我必须导入MatSortModule。我将app.module.ts中的导入列表更改为
imports: [
BrowserModule,
MatTableModule,
MatSortModule
],
它工作得很好
我有一个问题,排序功能正在运行,但它没有正确排序。我意识到matColumnDef
必须与我在class / interface
中引用的matCellDef
属性相同。
根据角度材料documentation:
默认情况下,MatTableDataSource在假设已排序列的名称与列显示的数据属性名称匹配的情况下进行排序。
例如:
<ng-container matColumnDef="name">
<mat-header-cell *matHeaderCellDef mat-sort-header> NAME </mat-header-cell>
<mat-cell *matCellDef="let row"> {{row.name}} </mat-cell>
</ng-container>
name
指令中的matColumnDef
必须与name
组件中使用的<mat-cell>
相同。
在超时块中添加排序对我有用,
dataSource = new MatTableDataSource(this.articleService.getAllArticles());
setTimeout(() => {
this.tableDataSource.sort = this.sort;
this.tableDataSource.paginator = this.paginator;
});
如果您不想使用生命周期钩子。
matColumnDef名称和* matCellDef实际值名称应该相同
例:
<ng-container matColumnDef="oppNo">
<th mat-header-cell *matHeaderCellDef mat-sort-header>Opportunity Number</th>
<td mat-cell *matCellDef="let element">{{element.oppNo}}</td>
</ng-container>
在我的情况下,oppNo对于matColumnDef名称和* matCellDef名称和排序工作正常。
如果表在* ngIf内,它将无法正常工作。如果将其更改为[隐藏],它将起作用
我也遇到了这个问题。由于您需要等待定义子项,因此必须实现并使用AfterViewInit
,而不是onInit。
ngAfterViewInit (){
this.dataSource.sort = this.sort;
}