我需要在客户端实现分页。从后面,我收到以卡片形式带来的待办事项。我决定连接 mat-paginator,但遇到了问题。我将待办事项的数量传递给[length] =“length”,但是翻页并将总数分成几部分不起作用,将它们显示在不同的页面上。例如,我现在有 13 个待办事项(可能还有更多),我需要在 1 页上显示 4 个待办事项。 4 然后第二个,依此类推。 这是我的代码。
组件.html
...
<div class="tasks-list" >
<mat-card class="task-card" *ngFor="let task of tasks">
<mat-card-header>
<mat-card-title>
/////////some code////////////
</mat-card>
</div>
<mat-paginator [length]="length"
[pageSize]="4"
[pageSizeOptions]="[4, 8, 12]">
</mat-paginator>
组件.ts
@ViewChild(MatPaginator) paginator: MatPaginator;
constructor(private taskService: TaskListService) {}
ngOnInit() { this.getTasks();}
getTasks() {
this.taskService.getTasks()
.subscribe(
(data) => {
this.tasks = data;
this.length = this.tasks.length;
})
}
我很困惑下一步该做什么才能让它发挥作用。到处主要写如何在表格中打开分页,但是我没有表格。如果该行添加“async”,则它将不起作用。
最佳答案
分页器使用表数据源。
所有分页工作都是在迭代器方法内完成的。此方法计算出跳过和获取并将其分配给卡片列表的数据源。
查看:
<div class="tasks-list">
<mat-card class="task-card" *ngFor="let task of dataSource">
<mat-card-header>
<mat-card-title>
{{task}}
</mat-card-title>
</mat-card-header>
</mat-card>
</div>
<mat-paginator #paginator [pageSize]="pageSize" [pageSizeOptions]="[1, 10, 20]" [showFirstLastButtons]="true" [length]="totalSize"
[pageIndex]="currentPage" (page)="pageEvent = handlePage($event)">
</mat-paginator>
组件:
export class PaginatorOverviewExample implements OnInit {
public tasks: any[];
public dataSource: any;
public pageSize = 1;
public currentPage = 0;
public totalSize = 0;
@ViewChild(MatPaginator) paginator: MatPaginator;
ngOnInit() { this.getTasks(); }
getTasks() {
// Replace with HTTP call
var data = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11"];
this.dataSource = new MatTableDataSource<any>(data);
this.dataSource.paginator = this.paginator;
this.tasks = data;
this.totalSize = this.tasks.length;
this.iterator();
}
handlePage(event?: PageEvent) {
this.currentPage = event.pageIndex;
this.pageSize = event.pageSize;
this.iterator();
}
private iterator() {
const end = (this.currentPage + 1) * this.pageSize;
const start = this.currentPage * this.pageSize;
const part = this.tasks.slice(start, end);
this.dataSource = part;
}
}
关于html - 分页在 Angular 7 中不起作用。(我使用 Angular Material ),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55043614/