Angular2将HTML添加到动态元素
我有以下代码:
import { Component, ElementRef, Renderer2 } from '@angular/core';@Component({
selector: 'my-app',
template: '<button (click)="runR()">Run</button>
<div class="testme">
<div class="somediv">
<div class="dynamically_created_div unique_identifier"></div>
<div class="dynamically_created_div unique_identifier"></div>
<div class="dynamically_created_div unique_identifier"></div>
</div>
</div>',
})
export class AppComponent{
hostEl: any;
constructor(
private el:ElementRef,
private renderer:Renderer2,
) {
this.hostEl = el.nativeElement;
}
runR(){
let change_this;
change_this= this.renderer.createElement('span');
this.renderer.addClass(change_this, 'change_this');
this.renderer.appendChild(this.hostEl, change_this);
}
}
有什么方法可以将HTML添加到中.dynamically_created_div
吗?因为上述内容仅添加到组件HTML的末尾。
我也尝试过:
import { Component, ElementRef, ViewChild, Renderer, AfterViewInit } from '@angular/core';@Component({
selector: 'my-app',
template: `<button (click)="runR()">Run</button>
<div class="testme">
<div class="somediv">
<div class="dynamically_created_div">
</div>
</div>
</div>
`,
})
export class AppComponent {
constructor(private renderer:Renderer) {}
runR() {
@ViewChild('dynamically_created_div') d1:ElementRef;
this.renderer.invokeElementMethod(this.d1.nativeElement, 'insertAdjacentHTML', ['beforeend', '<div class="new_div">new_div</div>'] );
}
}
但这是行不通的,因为@ViewChild指令必须在函数之外,我再也无法控制它了
我也这样尝试过:
<div class="dynamically_created_div" [innerHtml]="newHTML"></div>this.newHTML = '<div class="new_div">new_div</div>';
我不能做的事情是因为我的内容是动态的并且使用唯一的ID,并且我不能动态使用[innerHtml](它仅适用于我第一次放入它们的面板,然后其他任何更改都不能再使用innerHtml。
我检查了Angular2:在DOM中将动态组件作为容器的子代插入,但是存在相同的问题,占位符不是动态的
我的代码稍微复杂一点:
TS:
import { AfterContentInit, Component, OnInit, OnDestroy, ViewEncapsulation } from '@angular/core';import { NgForm, FormsModule, ReactiveFormsModule, FormGroup, FormControl, FormBuilder, Validators } from '@angular/forms';
import { SFService } from '../services/sf.service';
import { Injectable, Pipe, PipeTransform } from '@angular/core';
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
providers: [ SFService ],
})
export class AppComponent implements OnInit {
constructor(
private sfservice: SFService,
) {}
ngOnInit(){
this.sfservice.getMembers().subscribe(members => {
this.members = members.members;
});
}
members: Member[];
member_selector: Member[];
member_each: Member;
member_selector_each: Member[];
cases: Case;
runR(){
this.members.forEach(member_each => {
this.member_selector.forEach(member_selector_each => {
if(member_each.Id === member_selector_each.Id){
console.log(member_selector_each.Id);
this.sfservice.getCaseHistory(member_selector_each.Id, "2017-04-25T00:00:00", "2017-04-28T23:59:59").subscribe(cases => {
this.member_each['cases'] = cases;
console.log(this.member_each);
});
}
})
})
}
}
HTML:
<form #myForm="ngForm" novalidate> <select name="member_selector_name" [(ngModel)]="member_selector" multiple ng-model="selectedValues" style="height:200px;">
<option *ngFor="let member of members" [ngValue]="member">{{member.Name}}</option>
</select>
<button (click)="runR()">Run</button>
</form>
<div id="results">
<div *ngFor="let mem of members" class="member-card-{{mem.Id}}">
<div class="card-container">
<div *ngFor="let case of mem.Cases" class="case-card" id="{{case.Id}}">{{case.Number}}
</div>
</div>
</div>
</div>
我只是尝试使用,ngFor
但现在我得到了
Cannot set property 'cases' of undefined
回答:
这种方法有什么问题?
export class AppComponent{ @ViewChild('d1') d1:ElementRef;
@ViewChild('d2') d2:ElementRef;
@ViewChild('d3') d3:ElementRef;
constructor(private renderer:Renderer2) { }
runR(){
let change_this;
change_this= this.renderer.createElement('span');
this.renderer.addClass(change_this, 'change_this');
this.renderer.appendChild(this.d1, change_this);
}
}
模板:
<div class="dynamically_created_div unique_identifier" #d1></div><div class="dynamically_created_div unique_identifier" #d2></div>
<div class="dynamically_created_div unique_identifier" #d3></div>
以上是 Angular2将HTML添加到动态元素 的全部内容, 来源链接: utcz.com/qa/419229.html