单击行后插入动态创建的组件 [英] Insert dynamically create component after clicked row

问题描述

我正在研究一种解决方案，在该解决方案中，我想在单击行后追加动态创建的组件

I am working on solution in which i want to append dynamically created component after clicked row

我的表包含带有操作按钮的行，单击这些按钮后，我将调用角度函数并在该行之后加载组件.

I have table consist rows with action button on click of which i will call angular function and load component after that row.

这是表代码

<div class="row" *ngFor="let rData of reportData; let i = index;" >
        <div class="col" >
            <button class="btn btn-sm" (click)="loadChildComponent()">+</button>
        </div>
        <div class="col">Name</div>
        <div class="col">Description</div>
        <ng-template #dynamic></ng-template>

</div>

动态组件代码

Service.ts


import { DynamicComponent } from './dynamic.component'
@Injectable()
export class Service {
  factoryResolver;
  rootViewContainer; 
  constructor(@Inject(ComponentFactoryResolver) factoryResolver) {
    this.factoryResolver = factoryResolver
  }
  setRootViewContainerRef(viewContainerRef) {
    this.rootViewContainer = viewContainerRef
  }
  addDynamicComponent() {
    const factory = this.factoryResolver
                        .resolveComponentFactory(DynamicComponent)

    const component = factory
      .create(this.rootViewContainer.parentInjector)

    this.rootViewContainer.insert(component.hostView)
  }
}

这是组件文件.

dynamic.component.ts

dynamic.component.ts

import { Component } from '@angular/core'
@Component({
  selector: 'dynamic-component',
  template: `<div class="row"  >
            <div class="col">Data</div>
            <div class="col">Data</div>
            <div class="col">Data</div>
            <div class="col">Data</div>
            <div class="col">Data</div>
            <div class="col">Data</div>
            <div class="col">Data</div>
    <ng-template #dynamic></ng-template>
    </div>`
})
export class DynamicComponent { }

用于呈现动态组件的功能

Functions used to render dynamic component

@ViewChild('dynamic', { 
      read: ViewContainerRef 
    }) viewContainerRef: ViewContainerRef

loadChildComponent() {
        this.service.setRootViewContainerRef(this.viewContainerRef)
        this.service.addDynamicComponent()
    }

现在将其添加到同一div中的任何行中

Right now its appending in same div for any of rows

我想在点击行后追加它

请帮助.

推荐答案

Angular中的ng-template就像一个幽灵元素，即从不直接显示.选中此链接.

The ng-template in Angular acts like a ghost element i.e. it is never displayed directly. Check this link.

更新:

因为您一直使用 @ViewChild ，所以总是在第一行插入模板. @ViewChild在模板中查找第一个元素.

You are having the template inserted with first row always because you have used @ViewChild. @ViewChild looks for the first element in the template.

尝试使用 @ViewChildren .

请参考以下更改:

<ng-container *ngFor="let rData of reportData; let i = index;">
    <div class="row">
        <div class="col" >
            <button class="btn btn-sm" (click)="loadChildComponent(i)">+</button>
        </div>
        <div class="col">Name</div>
        <div class="col">Description</div>

    </div>
    <div class="row">
        <ng-template #dynamic></ng-template>
    </div>
</ng-container>

JS更改:

@ViewChildren('dynamic', { read: ViewContainerRef }) viewContainerRef: QueryList<ViewContainerRef>

loadChildComponent(index) {
        this.service.setRootViewContainerRef(this.viewContainerRef.toArray()[index])
        this.service.addDynamicComponent()
    }

希望这会有所帮助:)

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