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我只是想使用角材料測試2.0.0 beta.8新推出的數據表，但我不能讓它的工作，因爲我堅持了這個錯誤：MD-表角材料2不工作
ERROR TypeError: Cannot read property 'columnsChange' of undefined
at MdTable.webpackJsonp.../../../cdk/@angular/cdk.es5.js.CdkTable.ngAfterContentInit (cdk.es5.js:1950)
at callProviderLifecycles (core.es5.js:11174)
at callElementProvidersLifecycles (core.es5.js:11155)
at callLifecycleHooksChildrenFirst (core.es5.js:11139)
at checkAndUpdateView (core.es5.js:12239)
at callViewAction (core.es5.js:12601)
at execEmbeddedViewsAction (core.es5.js:12559)
at checkAndUpdateView (core.es5.js:12237)
at callViewAction (core.es5.js:12601)
at execComponentViewsAction (core.es5.js:12533)
at checkAndUpdateView (core.es5.js:12242)
at callViewAction (core.es5.js:12601)
at execEmbeddedViewsAction (core.es5.js:12559)
at checkAndUpdateView (core.es5.js:12237)
at callViewAction (core.es5.js:12601)
我進口都MdTableModule和CdkTableModule到我的應用程序的模塊。
的DataSource實現是這樣的：
import {OnInit, Component} from "@angular/core";
import {SetupSummaryService} from "./setupSummaryService";
import {BehaviorSubject} from 'rxjs/BehaviorSubject';
import {Observable} from 'rxjs/Observable';
import {DataSource} from "@angular/cdk";
import 'rxjs/add/operator/startWith';
import 'rxjs/add/observable/merge';
import 'rxjs/add/operator/map';
@Component({
templateUrl: 'setupSummary.component.html',
styleUrls: ['setupSummary.component.scss'],
providers: [SetupSummaryService]
})
export class SetupSummaryComponent implements OnInit {
displayedColumns = ['userId', 'userName', 'progress', 'color'];
exampleDatabase = new ExampleDatabase();
dataSource: ExampleDataSource | null;
constructor() {
}
ngOnInit(): void {
this.dataSource = new ExampleDataSource(this.exampleDatabase);
}
}
/** 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) {
super();
}
/** Connect function called by the table to retrieve one stream containing the data to render. */
connect(): Observable<UserData[]> {
return this._exampleDatabase.dataChange;
}
disconnect() {}
}
，這裏是我的HTML模板：
<md-table [dataSource]="dataSource">
<!--- 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 cdkColumnDef="userId">
<md-header-cell *cdkHeaderCellDef> ID </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.id}} </md-cell>
</ng-container>
<!-- Progress Column -->
<ng-container cdkColumnDef="progress">
<md-header-cell *cdkHeaderCellDef> Progress </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.progress}}% </md-cell>
</ng-container>
<!-- Name Column -->
<ng-container cdkColumnDef="userName">
<md-header-cell *cdkHeaderCellDef> Name </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.name}} </md-cell>
</ng-container>
<!-- Color Column -->
<ng-container cdkColumnDef="color">
<md-header-cell *cdkHeaderCellDef>Color</md-header-cell>
<md-cell *cdkCellDef="let row" [style.color]="row.color"> {{row.color}} </md-cell>
</ng-container>
</md-table>
我按照網址https://material.angular.io/components/table/overview
爲指導，以實現這一點。
你可以創建一個'plunker' – Aravind
@Aravind，我嘗試創建plunker，但它不允許我添加Angular Material beta 2.0.0-beta.8。對不起，我是新來的笨蛋，我嘗試從包中添加它，並且它不可用是否有任何其他方式待辦事項。 – user1188867
@ user1188867您可以嘗試在此重新創建它：http://plnkr.co/edit/o077B6uEiiIgkC0S06dd – Edric