动态设置 md-paginator 值 [英] set md-paginator values dynamically
问题描述
我正在尝试使用 angular-material2
的 pagination
.我面临的问题是通过服务动态设置 md-paginator
的值.
我已经设法使用静态值创建了分页,但我不知道如何动态设置它们.
TS
import {Component,ChangeDetectorRef, Input,ViewChild } from '@angular/core';从@angular/http"导入 {Http, Response, RequestOptions, Headers, Request, RequestMethod};从@angular/material"导入 {MdPaginator,PageEvent};从 '@angular/cdk' 导入 {DataSource};从 'rxjs/BehaviorSubject' 导入 {BehaviorSubject};从 'rxjs/Observable' 导入 {Observable};导入 'rxjs/add/operator/startWith';导入 'rxjs/add/observable/merge';导入 'rxjs/add/operator/map';@成分({选择器:'table-http-example',styleUrls: ['table-http-example.css'],templateUrl: 'table-http-example.html',})导出类 TableHttpExample {displayColumns = ['dbquery', 'title'];示例数据库:ExampleHttpDatabase |空值;数据源:ExampleDataSource |空值;页面事件:页面事件;@ViewChild(MdPaginator) 分页器:MdPaginator;构造函数(私有http:Http){}ngOnInit(){this.loadData();}加载数据(){this.exampleDatabase = new ExampleHttpDatabase(this.http);this.dataSource = new ExampleDataSource(this.exampleDatabase,this.paginator);}onPaginateChange(事件){const startIndex = event.pageIndex * event.pageSize;this.dataSource = new ExampleDataSource(this.exampleDatabase,this.paginator);}}/** 数据源用于检索表数据的示例数据库.*/导出类 ExampleHttpDatabase {私人问题Url = 'https://emgrweb.ecwcloud.com/eManagerWeb/rest/InterfaceQAClientController/getInterfaceClientScripts';//指向 Web API 的 URLgetRepoIssues(startIndex,pageSize): Observable{var headers = new headers();headers.append('Content-Type', 'text/plain');var requestoptions = new RequestOptions({方法:RequestMethod.Post,网址:this.issuesUrl,标题:标题正文:开始="+开始索引+&limit="+ pageSize})返回 this.http.request(new Request(requestoptions)).map(this.extractData);}提取数据(结果:响应):任何{返回 result.json().data.map(data => {返回数据});}onPaginateChange(事件){//警报(JSON.stringify(事件));const startIndex = event.pageIndex * event.pageSize;//this.drugmap.getDrugDataForClient(startIndex, event.pageSize);this.dataSource = new BindDataTableSource(this.drugmap,event);}构造函数(私有 http: Http){}}导出类 ExampleDataSource 扩展了 DataSource{构造函数(私有_exampleDatabase:ExampleHttpDatabase,私有_paginator:MdPaginator){极好的();}/** 表调用的连接函数以检索包含要呈现的数据的流.*/connect(): Observable{console.log( this._paginator);const startIndex = this._paginator.pageIndex * this._paginator.pageSize;返回 this._exampleDatabase.getRepoIssues(startIndex, this._paginator.pageSize);}断开连接(){}}
HTML
<md-table #table [dataSource]="dataSource"><ng-container cdkColumnDef="dbquery"><md-header-cell *cdkHeaderCellDef>dbquery </md-header-cell><md-cell *cdkCellDef="let row">{{row.title}} </ng-容器><ng-container cdkColumnDef="title"><md-header-cell *cdkHeaderCellDef>标题</md-header-cell><md-cell *cdkCellDef="let row">{{row.title}} </ng-容器><md-header-row *cdkHeaderRowDef="displayedColumns"></md-header-row><md-row *cdkRowDef="让行;列:displayColumns;"></md-row></md-table><md-paginator #paginator[长度]="100"[页面索引]="0"[页面大小]="10"[pageSizeOptions]="[5, 10, 25, 100]"(page)="pageEvent = $event; onPaginateChange($event)"></md-paginator>
尝试将 paginator
对象传递给 ExampleHttpDatabase
,但是当我 console
输出它时,它显示未定义.
要动态更改值,请使用变量作为
的输入.当这些变量发生变化时,分页器会拾取它们并将它们呈现给视图.
</md-paginator>
I am trying to use pagination
of angular-material2
. The problem I am facing is to set the values of md-paginator
dynamically through a service.
I have managed to create the pagination using static values but I dont know how to set them dynamically.
TS
import {Component,ChangeDetectorRef, Input,ViewChild } from '@angular/core';
import {Http, Response, RequestOptions, Headers, Request, RequestMethod} from '@angular/http';
import {MdPaginator,PageEvent} from '@angular/material';
import {DataSource} from '@angular/cdk';
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';
@Component({
selector: 'table-http-example',
styleUrls: ['table-http-example.css'],
templateUrl: 'table-http-example.html',
})
export class TableHttpExample {
displayedColumns = ['dbquery', 'title'];
exampleDatabase: ExampleHttpDatabase | null;
dataSource: ExampleDataSource | null;
pageEvent: PageEvent;
@ViewChild(MdPaginator) paginator: MdPaginator;
constructor(private http: Http) {
}
ngOnInit(){
this.loadData();
}
loadData(){
this.exampleDatabase = new ExampleHttpDatabase(this.http);
this.dataSource = new ExampleDataSource(this.exampleDatabase,this.paginator);
}
onPaginateChange(event){
const startIndex = event.pageIndex * event.pageSize;
this.dataSource = new ExampleDataSource(this.exampleDatabase,this.paginator);
}
}
/** An example database that the data source uses to retrieve data for the table. */
export class ExampleHttpDatabase {
private issuesUrl = 'https://emgrweb.ecwcloud.com/eManagerWeb/rest/InterfaceQAClientController/getInterfaceClientScripts'; // URL to web API
getRepoIssues(startIndex,pageSize): Observable<any> {
var headers = new Headers();
headers.append('Content-Type', 'text/plain');
var requestoptions = new RequestOptions({
method: RequestMethod.Post,
url: this.issuesUrl,
headers: headers
body : "start=" +startIndex +"&limit="+ pageSize
})
return this.http.request(new Request(requestoptions)).map(this.extractData);
}
extractData(result: Response): any{
return result.json().data.map(data => {
return data
});
}
onPaginateChange(event){
//alert(JSON.stringify(event));
const startIndex = event.pageIndex * event.pageSize;
// this.drugmap.getDrugDataForClient(startIndex, event.pageSize);
this.dataSource = new BindDataTableSource(this.drugmap,event);
}
constructor(private http: Http) {}
}
export class ExampleDataSource extends DataSource<any> {
constructor(private _exampleDatabase: ExampleHttpDatabase,private _paginator : MdPaginator) {
super();
}
/** Connect function called by the table to retrieve one stream containing the data to render. */
connect(): Observable<any[]> {
console.log( this._paginator);
const startIndex = this._paginator.pageIndex * this._paginator.pageSize;
return this._exampleDatabase.getRepoIssues(startIndex, this._paginator.pageSize);
}
disconnect() {}
}
HTML
<div class="example-container mat-elevation-z8">
<md-table #table [dataSource]="dataSource">
<ng-container cdkColumnDef="dbquery">
<md-header-cell *cdkHeaderCellDef> dbquery </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.title}} </md-cell>
</ng-container>
<ng-container cdkColumnDef="title">
<md-header-cell *cdkHeaderCellDef> Title </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.title}} </md-cell>
</ng-container>
<md-header-row *cdkHeaderRowDef="displayedColumns"></md-header-row>
<md-row *cdkRowDef="let row; columns: displayedColumns;"></md-row>
</md-table>
<md-paginator #paginator
[length]="100"
[pageIndex]="0"
[pageSize]="10"
[pageSizeOptions]="[5, 10, 25, 100]"
(page)="pageEvent = $event; onPaginateChange($event)"
>
</md-paginator>
</div>
Tried passing the paginator
object to ExampleHttpDatabase
but when I console
it out, it says undefined.
To change the values dynamically, use variables as inputs to the <md-paginator>
. When those variables change, the paginator will pick them up and render them to the view.
<md-paginator #paginator
[length]="myExampleLength"
[pageIndex]="myExamplePageIndex"
[pageSize]="myExamplePageSize"
[pageSizeOptions]="myExamplePageSizeOptions"
(page)="pageEvent = $event; onPaginateChange($event)">
</md-paginator>
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