我有带分页的桌子。我构建了一个函数,该函数接受对象并对其进行过滤,然后在表中显示结果。
问题是,当我再次搜索时,对象的旧数据在第一次搜索中被删除,而当我再次搜索时,找不到我。
这是我的代码和排序函数:
export class TaxreportsComponent implements OnInit {
public taxList: Array<Tax>;
public page: number;
public currentPage: Array<Tax>;
public totalItems: number;
constructor(private service: CompanyService) {
this.totalItems = 0;
this.currentPage = [];
this.taxList = [];
this.page = 1;
}
ngOnInit() {
this.service.getTaxList((data) => this.onGetTaxList(data));
}
onGetTaxList(data) {
this.taxList = data;
this.currentPage = this.taxList.slice(0, 10);
this.totalItems = this.taxList.length;
}
pageChanged(event) {
const startItem = (event.page - 1) * event.itemsPerPage;
const endItem = event.page * event.itemsPerPage;
this.currentPage = this.taxList.slice(startItem, endItem);
}
// Sort the data and change the table
sort(searchWord) {
const data = this.taxList.filter(item => {
return item.type === searchWord;
});
this.onGetTaxList(data);
}
这是我的html:
<app-home-menu (filteEvent)="sort($event)" ></app-home-menu>
<div class="table-container">
<table class="table">
<thead>
<tr class="table-nav">
<th scope="col">Year</th>
<th scope="col">Type</th>
<th scope="col">HP</th>
<th scope="col">CompanyName</th>
</tr>
</thead>
<tbody>
<ng-container *ngFor="let tax of currentPage">
<tr>
<td>{{tax.year}}</td>
<td>{{tax.type}}</td>
<td>{{tax.cid}}</td>
<td>{{tax.company}}</td>
</tr>
</ng-container>
</tbody>
</table>
<div class="table-footer">
<pagination class="pagination" nextText=">" previousText="<" [totalItems]="totalItems" (pageChanged)="pageChanged($event)"> </pagination>
</div>
</div>
我需要为每次搜索找到一种方法,首先对原始对象进行初始化,然后再次搜索
答案 0 :(得分:1)
您仅使用一个变量(taxList
)来存储数据。当您从服务中获取实际数据时,就进行设置。当您对其进行过滤时,请再次进行设置。因此实际数据将会丢失。
您可以改为引入另一个变量(filteredTaxList
)来过滤数据。
现在,首先,当您从服务中获取实际数据时,应将其存储在taxList
上,并为其设置filteredTaxList
。
然后,当您更改过滤器时,可以从filteredTaxList
中设置taxList
。
然后您应该在整个代码中使用新变量(filteredTaxList
),例如分页等。
export class TaxreportsComponent implements OnInit {
public taxList: Array<Tax>;
public filteredList: Array<Tax>;
public page: number;
public currentPage: Array<Tax>;
public totalItems: number;
constructor(private service: CompanyService) {
this.totalItems = 0;
this.currentPage = [];
this.taxList = [];
this.filteredList= [];
this.page = 1;
}
ngOnInit() {
this.service.getTaxList((data) => this.onGetTaxList(data, true));
}
onGetTaxList(data, isOriginal) {
if(isOriginal) this.taxList = data;
this.filteredtaxList = data;
this.currentPage = this.filteredtaxList.slice(0, 10);
this.totalItems = this.filteredtaxList.length;
}
pageChanged(event) {
const startItem = (event.page - 1) * event.itemsPerPage;
const endItem = event.page * event.itemsPerPage;
this.currentPage = this.filteredTaxList.slice(startItem, endItem);
}
// Sort the data and change the table
sort(searchWord) {
const data = this.taxList.filter(item => {
return item.type === searchWord;
});
this.onGetTaxList(data, false);
}