如何使用材料角的分页器？

Question

我是角色的新手,并试图在我的应用程序中实现分页.我正在尝试使用这个材料组件.

用下面的代码,我可以得到length,pagesize和pageSizeOptions在我的.ts文件

<md-paginator [length]="length"
              [pageSize]="pageSize"
              [pageSizeOptions]="pageSizeOptions"
</md-paginator>

export class PaginatorConfigurableExample {

  length = 100;
  pageSize = 10;
  pageSizeOptions = [5, 10, 25, 100];

  }
}

但是,当页面被更改时,我似乎无法触发更改上表中数据的功能.此外,我怎么使用nextPage,previousPage,hasNextPage,和hasPreviousPage方法呢？

Answer 1

我在这里苦苦挣扎.但我可以告诉你我做了一些研究.基本上,你刚开始添加在页面@Output事件foo.template.ts:

 <md-paginator #paginator
                [length]="length"
                [pageIndex]="pageIndex"
                [pageSize]="pageSize"
                [pageSizeOptions]="[5, 10, 25, 100]"
                (page)="pageEvent = getServerData($event)"
                >
 </md-paginator>

之后,您必须在foo.component.ts类和其他类中添加pageEvent属性来处理分页器要求:

pageEvent: PageEvent;
datasource: null;
pageIndex:number;
pageSize:number;
length:number;

并添加将获取服务器数据的方法:

ngOnInit() {
   getServerData(null) ...
}

public getServerData(event?:PageEvent){
  this.fooService.getdata(event).subscribe(
    response =>{
      if(response.error) {
        // handle error
      } else {
        this.datasource = response.data;
        this.pageIndex = response.pageIndex;
        this.pageSize = response.pageSize;
        this.length = response.length;
      }
    },
    error =>{
      // handle error
    }
  );
  return event;
}

因此,基本上每次单击paginator时,都会激活getServerData(..)方法,该方法将调用foo.service.ts获取所需的所有数据.在这种情况下,您不需要处理nextPage和nextXXX事件,因为它将在视图呈现时自动计算.

希望这可以帮到你.如果你有成功,请告诉我.=]

Answer 2

根据 Wesley Coetzee 的回答，我写了这个。希望它可以帮助任何使用谷歌搜索这个问题的人。我在交换列表中间的分页器大小时遇到​​了错误，这就是我提交答案的原因：

分页器 html 和列表

<mat-paginator [length]="localNewspapers.length" pageSize=20
               (page)="getPaginatorData($event)" [pageSizeOptions]="[10, 20, 30]"
               showFirstLastButtons="false">
</mat-paginator>
<mat-list>
   <app-newspaper-pagi-item *ngFor="let paper of (localNewspapers | 
                         slice: lowValue : highValue)"
                         [newspaper]="paper"> 
  </app-newspaper-pagi-item>

组件逻辑

import {Component, Input, OnInit} from "@angular/core";
import {PageEvent} from "@angular/material";

@Component({
  selector: 'app-uniques-newspaper-list',
  templateUrl: './newspaper-uniques-list.component.html',
})
export class NewspaperUniquesListComponent implements OnInit {
  lowValue: number = 0;
  highValue: number = 20;

  // used to build a slice of papers relevant at any given time
  public getPaginatorData(event: PageEvent): PageEvent {
    this.lowValue = event.pageIndex * event.pageSize;
    this.highValue = this.lowValue + event.pageSize;
    return event;
  }

}

Answer 3

嘿所以我偶然发现了它,并使它工作,这是如何:

在我的component.html中

<mat-paginator #paginator [pageSize]="pageSize" [pageSizeOptions]="[5, 10, 20]" [showFirstLastButtons]="true" [length]="totalSize"
    [pageIndex]="currentPage" (page)="pageEvent = handlePage($event)">
</mat-paginator>

在我的组件里面

public array: any;
public displayedColumns = ['', '', '', '', ''];
public dataSource: any;    

public pageSize = 10;
public currentPage = 0;
public totalSize = 0;

@ViewChild(MatPaginator) paginator: MatPaginator;

constructor(private app: AppService) { }

ngOnInit() {
  this.getArray();
}

public handlePage(e: any) {
  this.currentPage = e.pageIndex;
  this.pageSize = e.pageSize;
  this.iterator();
}

private getArray() {
  this.app.getDeliveries()
    .subscribe((response) => {
      this.dataSource = new MatTableDataSource<Element>(response);
      this.dataSource.paginator = this.paginator;
      this.array = response;
      this.totalSize = this.array.length;
      this.iterator();
    });
}

private iterator() {
  const end = (this.currentPage + 1) * this.pageSize;
  const start = this.currentPage * this.pageSize;
  const part = this.array.slice(start, end);
  this.dataSource = part;
}

所有的分页工作都是从该iterator方法中完成的.此方法适用了skip,并take和该分配到dataSource的材料表.

Answer 4

使用Slice Pipe将Angular Paginator与数据表链接的另一种方法.这些数据仅从服务器获取一次.

视图:

 <div class="col-md-3" *ngFor="let productObj of productListData | 
     slice: lowValue : highValue">
       //actual data dispaly  
 </div>

<mat-paginator [length]="productListData.length" [pageSize]="pageSize" 
   (page)="pageEvent = getPaginatorData($event)">
</mat-paginator> 

零件

    pageIndex:number = 0;
    pageSize:number = 50;
    lowValue:number = 0;
    highValue:number = 50;       

  getPaginatorData(event){
     console.log(event);
     if(event.pageIndex === this.pageIndex + 1){
        this.lowValue = this.lowValue + this.pageSize;
        this.highValue =  this.highValue + this.pageSize;
       }
    else if(event.pageIndex === this.pageIndex - 1){
       this.lowValue = this.lowValue - this.pageSize;
       this.highValue =  this.highValue - this.pageSize;
      }   
       this.pageIndex = event.pageIndex;
 }

Answer 5

成分：

import { Component,  AfterViewInit, ViewChild } from @angular/core;
import { MatPaginator } from @angular/material;

export class ClassName implements AfterViewInit {
    @ViewChild(MatPaginator) paginator: MatPaginator;
    length = 1000;
    pageSize = 10;
    pageSizeOptions: number[] = [5, 10, 25, 100];

    ngAfterViewInit() {
        this.paginator.page.subscribe(
           (event) => console.log(event)
    );
}

HTML

<mat-paginator 
   [length]="length"
   [pageSize]="pageSize" 
   [pageSizeOptions]="pageSizeOptions"
   [showFirstLastButtons]="true">
</mat-paginator>

Answer 6

原始问题中的问题是您没有捕获“页面”事件，要解决此问题，您需要(page)='yourEventHandler($event)在 md-paginator 标签中添加' 作为属性。

在这里检查一个工作示例

您还可以在此处查看 API 文档