我使用mfDataTable在UI中表示我的数据。我每行都有一个按钮,用于删除行。从组件中的阵列中删除数据是可行的,但表不会刷新。我告诉你我的代码,请给我一些提示,我会犯错误,以及如何刷新UI上的表格!
mfDataTable
来自:
import { DataTableModule } from "angular2-datatable";
我的服务类,其中包含修复数据:
@Injectable()
export class AgentsService {
agentsData = [{
'id': 1,
'agentCountry': 40,
'agentName': 'New Agent',
'agentNumber': 246
},
{...more agents...}
];
removeAgentByAgentId(agent: any): void {
let index: number = this.agentsData.indexOf(agent);
if (index !== -1) {
this.agentsData.splice(index, 1);
}
}
}
HTML部分,其中表格定义为mfDataTable
:
<table class="table table-striped" [mfData]="agentsData | agentsDataFilterByCountry : filterByCountry" #mf="mfDataTable" [mfRowsOnPage]="rowsOnPage"
[(mfSortBy)]="sortBy" [(mfSortOrder)]="sortOrder">
<thead>
<tr>
<th style="width: 15%">Actions</th>
<th style="width: 20%">
<mfDefaultSorter by="agentName">Name</mfDefaultSorter>
</th>
<th style="width: 5%">
<mfDefaultSorter by="agentNumber">Number</mfDefaultSorter>
</th>
<th style="width: 10%">
<mfDefaultSorter by="agentCountry">Country</mfDefaultSorter>
</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let agent of mf.data; let i = index" [attr.data-index]="i">
<td>
<button (click)="onDeleteConfirm(agent)" class="btn btn-danger ion-trash-a"></button>
</td>
<td>{{agent.agentName}}</td>
<td>{{agent.agentNumber}}</td>
<td>{{agent.agentCountry}}</td>
</tr>
</tbody>
</table>
我实现OnChanges
的组件,但没有从ngOnChanges
方法记录,也不刷新数据表:
import { Component, OnInit, OnChanges, SimpleChange, Input } from '@angular/core';
import { AgentsService } from '../../services/agents/agents.service';
@Component({
selector: 'app-agents',
templateUrl: './agents.component.html',
styleUrls: ['./agents.component.scss']
})
export class AgentsComponent implements OnInit, OnChanges {
private service: AgentsService;
agentsData: Array<any>;
filterByCountry = "40";
rowsOnPage = 10;
sortBy = "agentName";
sortOrder = "asc";
constructor(service: AgentsService) {
this.service = service;
this.agentsData = service.agentsData;
}
ngOnInit() {
}
ngOnChanges(changes: {[propKey: string]: SimpleChange}) {
console.log("something changed");//not logging anything... :(
}
onDeleteConfirm(agent: any): void {
if (window.confirm('Are you sure you want to delete?')) {
console.log("agentsData before remove: "+this.agentsData.length);
this.service.removeAgentByAgentId(agent);
this.agentsData = service.agentsData;
console.log("agentsData after remove: "+this.agentsData.length);
}
}
}
在onDeleteConfirm
方法中,日志在删除之前和之后清楚地显示,它删除了所选代理。但不刷新表。我该如何刷新它?谢谢!
答案 0 :(得分:1)
你应该清楚你的收藏。在组件中使用以下内容:
this.agentsData = new Array<any>();
this.agentsData = this.service.getAgentData();
在服务中创建了一个getter方法
OR
this.agentsData = new Array<any>();
this.agentsData = this.agentsData.concat(this.service.agentsData);
也会这样做。