在項目中,前端傳給背景的參數有:
pageSize:每頁的條數
pageNo:目前頁碼
比如目前是第1頁,每頁20條,則背景傳回第1頁的20條記錄(sql應該是用limit去擷取分頁資料)
同時,背景接口還會傳回清單的總條數totalNum,前端根據totaNum/pageSize計算總共有多少頁
如圖:
注意事項:
需要先配置好路由(Angular2路由與導航)
使用步驟:
(1)在項目中引入分頁元件
// app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { AppComponent } from './app.component';
import { RouterModule } from '@angular/router';
import { Demo } from './demo/demo';
import { Page } from './page/page';
@NgModule({
declarations: [
AppComponent,
Demo,
Page
],
imports: [
BrowserModule,
FormsModule,
RouterModule.forRoot([
{
path: 'demo',
component: Demo
}
]),
HttpModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule {
}
(2)在頁面中使用分頁元件:
// demo.html
<!--分頁元件參數:pageSize,totalNum,curPage,totalPage-->
<page-template [pageParams]="{pageSize:20,totalNum:100,curPage:1,totalPage:5}" (changeCurPage)="getPageData($event)"></page-template>
// demo.ts
import { Component } from '@angular/core';
import { Location } from '@angular/common';
import { Router } from '@angular/router';
@Component({
selector: 'demo',
templateUrl: './demo.html'
})
export class Demo {
public params; // 儲存頁面url參數
public totalNum = ; // 總資料條數
public pageSize = ;// 每頁資料條數
public totalPage = ;// 總頁數
public curPage = ;// 目前頁碼
constructor(location:Location) {
let vm = this;
if (vm.params) {
vm.params = vm.params.replace('?', '').split('&');
let theRequest = [];
for (let i = ; i < vm.params.length; i++) {
theRequest[vm.params[i].split("=")[]] = vm.params[i].split("=")[] == 'pageNo' ? parseInt(vm.params[i].split("=")[]) : vm.params[i].split("=")[];
}
vm.params = theRequest;
if (vm.params['pageNo']) {
vm.curPage = vm.params['pageNo'];
//console.log('目前頁面', vm.curPage);
}
} else {
vm.params = {};
}
}
getPageData(pageNo) {
let vm = this;
vm.curPage = pageNo;
console.log('觸發', pageNo);
}
}
分頁元件源碼:
page.html
<!--分頁元件-->
<div class="col-md-12 text-right margin-bottom" *ngIf="pageParams.totalPage>1 && pageParams.totalNum>0">
<a class="pull-left text-sm">總計 {{pageParams.totalNum}} 條,第 {{pageParams.curPage}} / {{pageParams.totalPage}} 頁</a>
<button class="btn btn-default previous" [routerLink]="['./']" [disabled]="pageParams.curPage<=5"
(click)="changePage(pageParams.curPage-5)" [queryParams]="{pageNo:pageParams.curPage-5}"><<</button>
<button class="btn btn-default next" [routerLink]="['./']" (click)="changePage(pageParams.curPage-1)"
[queryParams]="{pageNo:pageParams.curPage-1}" [disabled]="pageParams.curPage==1">上一頁</button>
<button class="btn btn-default" [routerLink]="['./']" [disabled]="pageParams.curPage==page.pageNo"
(click)="changePage(page.pageNo)" [queryParams]="page" *ngFor="let page of getPageList(pageParams)">
{{page.pageNo}}
</button>
<button class="btn btn-default next" [routerLink]="['./']" (click)="changePage(pageParams.curPage-(-1))"
[queryParams]="{pageNo:pageParams.curPage-(-1)}" [disabled]="pageParams.curPage==pageParams.totalPage">下一頁</button>
<button class="btn btn-default previous" [routerLink]="['./']" [disabled]="pageParams.totalPage-pageParams.curPage<=5"
(click)="changePage(pageParams.curPage-(-5))" [queryParams]="{pageNo:pageParams.curPage-(-5)}">>></button>
</div>
<div class="col-md-12 text-center text-sm text-dark-gray" *ngIf="!pageParams.totalNum">
空空如也
</div>
page.ts
import { Component,Input, Output,EventEmitter } from '@angular/core';
@Component({
selector: 'page',
templateUrl: './page.html'
})
export class Page {
@Input('pageParams') pageParams;// 父元件向子元件傳值
@Output() changeCurPage:EventEmitter<Number> = new EventEmitter;// 子元件向父元件廣播事件,觸發改變目前頁面的事件
public pageList = [, , , , ];
public totalPage = ;
constructor() {
let vm = this;
//console.log('從父元件擷取的參數', vm['pageParams']);
}
getPageList(pageParams) {
/*分頁設定*/
let pageList=[];
if (pageParams.totalPage <= ) {//如果總的頁碼數小于5(前五頁),那麼直接放進數組裡顯示
for (let i = ; i < pageParams.totalPage; i++) {
pageList.push({
pageNo: i +
});
}
} else if (pageParams.totalPage - pageParams.curPage < && pageParams.curPage > ) {//如果總的頁碼數減去目前頁碼數小于5(到達最後5頁),那麼直接計算出來顯示
pageList = [
{
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage
}
];
} else {//在中間的頁碼數
let cur = Math.floor((pageParams.curPage - ) / ) * + ;
pageList = [
{
pageNo: cur
}, {
pageNo: cur +
}, {
pageNo: cur +
}, {
pageNo: cur +
}, {
pageNo: cur +
},
];
}
return pageList;
}
changePage(pageNo) {
let vm = this;
//console.log('修改頁碼', pageNo);
vm.pageParams.curPage = pageNo;
vm.changeCurPage.emit(vm.pageParams.curPage);
}
}
ng2還在入門中,元件有待完善,請多多指教
項目demo:https://github.com/youzouzou/ng2-paginator