Insert dynamically create component after clicked row

问题

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

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

Here is table code

<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>

Code for dynamic components

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)
  }
}

Here is component file.

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 { }

Functions used to render dynamic component

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

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

Right now its appending in same div for any of rows

i would like to append it after clicked row

Please help..

回答1:

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

Update:

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

Try using @ViewChildren instead.

Refer the following changes:

<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 changes:

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

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

Hope this helps :)

来源：https://stackoverflow.com/questions/52535851/insert-dynamically-create-component-after-clicked-row

标签

javascript

angular5

angular-components