[英]Angular2 Parameterised router link component does not refresh completely
單擊菜單項時,我試圖顯示一組圖像。 菜單就像
<ul id="demo23" class="collapse">
<li>
<a [routerLink]="['image-gallery','Picasso']">Picasso</a>
</li>
<li>
<a [routerLink]="['image-gallery','Vincent']">Vincent</a>
</li>
<li>
<a [routerLink]="['image-gallery','Rembrandt']">Rembrandt</a>
</li>
</ul>
路由器組件是
export class ImageGalleryComponent {
private artistName: String;
private galleryRoute: ActivatedRoute;
private apiService: ApiService;
private imageList;
private sanitizer: DomSanitizer;
constructor(route: ActivatedRoute, apiService: ApiService, sanitizer: DomSanitizer) {
this.galleryRoute = route;
this.apiService = apiService;
this.imageList = new Array;
this.sanitizer = sanitizer;
}
ngOnInit() {
this.galleryRoute.params.subscribe(params => {
console.log("Initial image list length");
console.log(this.imageList.length);
this.artistName = params['artistName'];
let artistName2Send = this.artistName;
console.log(this.artistName);
this.apiService.sendAsNonJSON("http://localhost:8080/icreate/getImages", artistName2Send).subscribe(demo => {
let imageList: String[] = demo;
var imageListLength = imageList.length;
var index;
for (index = 0; index < imageListLength; index++) {
this.imageList[index] = this.sanitizer.bypassSecurityTrustHtml(imageList[index] as string);
}
console.log(this.imageList);
});
});
在app.routing.ts中的輸入是
{ path: 'image-gallery/:artistName', component: ImageGalleryComponent }
單擊第一個菜單必須顯示4張圖像,但是當我單擊第二個菜單選項時,它將顯示4張圖像,而它應該顯示1張圖像。 第一個圖像是正確的圖像,其他3個圖像是該路由的先前調用的圖像,尚未刪除。
我需要刪除以前的組件已顯示的內容並顯示新圖像。 任何建議都將受到歡迎
我前一段時間遇到了這樣的問題,它是由於角度的組件重用而改變了URL,但沒有刷新組件。 因此,這里是我如何強制它(在大量stackoverflow之后)。 您需要訂閱參數更改,並在訂閱中執行某些操作。
1)從@ angular / route導入ActivatedRoute和從rxjs訂閱
import { Subscription } from 'rxjs/Rx';
import { ActivatedRoute} from '@angular/router';
export class YourComponent implements onInit, onDestroy {
private subscription: Subscription;
2)在您的ngOnInit中,訂閱並在其中進行某些操作
ngOnInit() {
this.subscription = this.activatedRoute.params.subscribe((params) => {
this.productId = params['id'];
//do something here to trigger the changes
this.product = this.productService.getProduct(this.productId);
console.log(this.product);
});
}
3)最后但並非最不重要的一點,不要忘記退訂
ngOnDestroy() {
this.subscription.unsubscribe();
}
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