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 = ; // 总数据条数
public pageSize = ;// 每页数据条数
public totalPage = ;// 总页数
public curPage = ;// 当前页码
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('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 = [, , , , ];
public totalPage = ;
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 <= ) {//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 = ; i < pageParams.totalPage; i++) {
pageList.push({
pageNo: i +
});
}
} else if (pageParams.totalPage - pageParams.curPage < && pageParams.curPage > ) {//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 -
}, {
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage -
}, {
pageNo: pageParams.curPage
}
];
} else {//在中间的页码数
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