angular - 带有 Angular 的 NativeScript 将参数传递给 url
问题描述
我正在尝试将参数传递给 URL,并根据传递给 URL 的参数显示信息。我有一个省份列表,我想要做的是当用户点击一个特定省份时,我想将该省份传递给 URL 并显示属于被点击省份的那个地区。我不确定我做错了什么,当我按下一个省份时,什么也没有发生,也没有加载。
示例网址:https ://example.com/province/?province_name=aprovince
服务.ts
export class DistrictService {
districtArray: Array<ProvinceData> = [];
url = "https://example.com/province";
headers = new HttpHeaders({
"Content-Type": "application/json",
Authorization: "Token 5a72afc446dd4c38e5f99"
});
constructor(private http: HttpClient) { }
getInfo(): any {
return this.http.get(this.url, {headers: this.headers});
}
getProvince(province: string){
return this.http.get<ProvinceData>(`${this.url}${province}/`, {headers: this.headers});
}
}
@Component({
selector: "ns-district",
templateUrl: "./district.component.html",
styleUrls: ["./district.component.css"],
moduleId: module.id
})
export class DistrictComponent implements OnInit {
districtData: ProvinceData;
// tslint:disable-next-line: max-line-length
constructor(private districtservices: DistrictService, private route: ActivatedRoute, private router: RouterExtensions) { }
ngOnInit(): void {
const province = this.route.snapshot.params.province;
this.districtservices.getProvince(province).subscribe(
(data: ProvinceData) => {
this.districtData = data;
console.log(province)
},
(error) => console.error(error)
)
}
}
<StackLayout *ngIf="districtData">
<GridLayout android:useDefaultMargins="true" class="test" columns="auto,100" rows="auto,auto" width="2000" height="30" *ngFor="let item of districtData.district">
<Label class="list-province" nsRouterLink ="/district" [text]="item" col="0" row="0"></Label>
<Label class ="arrow-icon" text="" class="fas" col="1" row="0" ></Label>
</GridLayout>
</StackLayout>
解决方案
您需要HttpParams
从角度使用。http get
并在你的电话中传递它。您的代码将如下所示。
let httpParams = new HttpParams();
httpParams = httpParams.append(province_name, value);
getProvince(province: string){
return this.http.get<ProvinceData>(`${this.url}${province}`, {headers: this.headers, httpParams});
}
注意:使用查询参数时,您不需要/
在 url 末尾传递。