在Angular 7中,使用服务器端分页时可能会遇到错误。下面是一个解决方法的示例代码:
pagination.ts
的新文件,其中包含一个Pagination
类:export class Pagination {
currentPage: number;
totalPages: number;
pageSize: number;
totalItems: number;
constructor() {
this.currentPage = 1;
this.totalPages = 0;
this.pageSize = 10;
this.totalItems = 0;
}
}
HttpClient
和Pagination
类:import { Component, OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Pagination } from './pagination';
pagination
属性,并在构造函数中实例化它:export class MyComponent implements OnInit {
pagination: Pagination;
constructor(private http: HttpClient) {
this.pagination = new Pagination();
}
}
ngOnInit
生命周期钩子中,调用服务器端API获取分页数据,并更新pagination
对象的属性:ngOnInit() {
this.getData();
}
getData() {
const url = 'your-server-api-url';
// 默认参数
const params = {
page: this.pagination.currentPage,
pageSize: this.pagination.pageSize
};
// 调用服务器端API
this.http.get(url, { params }).subscribe((response: any) => {
// 更新pagination属性
this.pagination.totalItems = response.totalItems;
this.pagination.totalPages = Math.ceil(response.totalItems / this.pagination.pageSize);
});
}
pagination
属性来显示分页信息:
当前页: {{ pagination.currentPage }}
总页数: {{ pagination.totalPages }}
每页条目数: {{ pagination.pageSize }}
总条目数: {{ pagination.totalItems }}
通过这些步骤,你将能够在Angular 7中使用服务器端分页,并正确地显示分页信息。