这个错误通常是由于未正确指定输入数据类型所导致的。为避免出现此问题,请在分页组件中使用泛型类型,以允许传递不同类型的数据。例如:
export class AppComponent {
data: any[];
pagedData: any[];
pager: any = {};
constructor() {
this.data = [{ name: 'John'}, { name: 'Jane'}, { name: 'Mark'}, { name: 'Mike'}, { name: 'Bob'}, { name: 'Alice'}];
this.setPage(1);
}
setPage(page: number) {
let pageSize = 2;
this.pager = this.paginationService.getPager(this.data.length, page, pageSize);
this.pagedData = this.data.slice(this.pager.startIndex, this.pager.endIndex + 1);
}
}
export class PaginationService {
getPager(totalItems: number, currentPage: number = 1, pageSize: number = 10) {
let totalPages = Math.ceil(totalItems / pageSize);
let startPage: number, endPage: number;
if (totalPages <= 10) {
startPage = 1;
endPage = totalPages;
} else {
if (currentPage <= 6) {
startPage = 1;
endPage = 10;
} else if (currentPage + 4 >= totalPages) {
startPage = totalPages - 9;
endPage = totalPages;
} else {
startPage = currentPage - 5;
endPage = currentPage + 4;
}
}
let startIndex = (currentPage - 1) * pageSize;
let endIndex = Math.min(startIndex + pageSize - 1, totalItems - 1);
let pages = Array.from(Array((endPage + 1) - startPage).keys()).map(i => startPage + i);
let pager = {
totalItems: totalItems,
currentPage: currentPage,
pageSize: pageSize,
totalPages: totalPages,
startPage: startPage,
endPage: endPage,
startIndex: startIndex,
endIndex: endIndex,
pages: pages
};
return pager;
}
}
在这个示例中,AppComponent
使用any
类型定义了data
和pagedData
变量,pager
变量的类型为任意。这会导致Angular
分页组件使用不受限制的any
类型数据,从而导致错误。为了解决这个问题,我们可以使用