时间:2021-06-18 08:44:19 | 栏目:AngularJS | 点击:次
在项目中,前端传给后台的参数有:
pageSize:每页的条数
pageNo:当前页码
比如当前是第1页,每页20条,则后台返回第1页的20条记录(sql应该是用limit去获取分页数据)
同时,后台接口还会返回列表的总条数totalNum,前端根据totaNum/pageSize计算总共有多少页
如图:
注意事项:
需要先配置好路由(Angular2路由与导航)
使用步骤:
(1)在项目中引入分页组件
// 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)在页面中使用分页组件:
// demo.html <!--分页组件参数: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; // 保存页面url参数 public totalNum = 0; // 总数据条数 public pageSize = 20;// 每页数据条数 public totalPage = 0;// 总页数 public curPage = 1;// 当前页码 constructor(location:Location) { let vm = this; if (vm.params) { vm.params = vm.params.replace('?', '').split('&'); let theRequest = []; for (let i = 0; i < vm.params.length; i++) { theRequest[vm.params[i].split("=")[0]] = vm.params[i].split("=")[0] == 'pageNo' ? parseInt(vm.params[i].split("=")[1]) : vm.params[i].split("=")[1]; } vm.params = theRequest; if (vm.params['pageNo']) { vm.curPage = vm.params['pageNo']; //console.log('当前页面', vm.curPage); } } else { vm.params = {}; } } getPageData(pageNo) { let vm = this; vm.curPage = pageNo; console.log('触发', pageNo); } }
分页组件源码:
page.html
<!--分页组件--> <div class="col-md-12 text-right margin-bottom" *ngIf="pageParams.totalPage>1 && pageParams.totalNum>0"> <a class="pull-left text-sm">总计 {{pageParams.totalNum}} 条,第 {{pageParams.curPage}} / {{pageParams.totalPage}} 页</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">上一页</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">下一页</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;// 父组件向子组件传值 @Output() changeCurPage:EventEmitter<Number> = new EventEmitter;// 子组件向父组件广播事件,触发改变当前页面的事件 public pageList = [1, 2, 3, 4, 5]; public totalPage = 5; constructor() { let vm = this; //console.log('从父组件获取的参数', vm['pageParams']); } getPageList(pageParams) { /*分页设置*/ let pageList=[]; if (pageParams.totalPage <= 5) {//如果总的页码数小于5(前五页),那么直接放进数组里显示 for (let i = 0; i < pageParams.totalPage; i++) { pageList.push({ pageNo: i + 1 }); } } else if (pageParams.totalPage - pageParams.curPage < 5 && pageParams.curPage > 4) {//如果总的页码数减去当前页码数小于5(到达最后5页),那么直接计算出来显示 pageList = [ { pageNo: pageParams.curPage - 4 }, { pageNo: pageParams.curPage - 3 }, { pageNo: pageParams.curPage - 2 }, { pageNo: pageParams.curPage - 1 }, { pageNo: pageParams.curPage } ]; } else {//在中间的页码数 let cur = Math.floor((pageParams.curPage - 1) / 5) * 5 + 1; pageList = [ { pageNo: cur }, { pageNo: cur + 1 }, { pageNo: cur + 2 }, { pageNo: cur + 3 }, { pageNo: cur + 4 }, ]; } return pageList; } changePage(pageNo) { let vm = this; //console.log('修改页码', pageNo); vm.pageParams.curPage = pageNo; vm.changeCurPage.emit(vm.pageParams.curPage); } }
ng2还在入门中,组件有待完善,请多多指教
项目demo:https://github.com/youzouzou/ng2-paginator
源码下载:http://xiazai.jb51.net/201704/yuanma/ng2-paginator-master_jb51.rar